Abiogenic petroleum origin

Abiogenic petroleum origin

Abiogenic petroleum origin is a largely abandoned hypothesis that was proposed as an alternative to theory of biological petroleum origin. It was relatively popular in the past, but it went largely forgotten at the end of the 20th century after it failed to predict the location of new wells.[1]

The abiogenic hypothesis argues that petroleum was formed from deep carbon deposits, perhaps dating to the formation of the Earth. Supporters of the abiogenic hypothesis suggest that a great deal more petroleum exists on Earth than commonly thought, and that petroleum may originate from carbon-bearing fluids that migrate upward from the mantle. The presence of methane on Saturn's moon Titan and in the atmospheres of Jupiter, Saturn, Uranus and Neptune is cited[1] as evidence of the formation of hydrocarbons without biology.[2]

The biogenic theory for petroleum was first proposed by Georg Agricola in the 16th century and various abiogenic hypotheses were proposed in the 19th century, most notably by Alexander von Humboldt, the Russian chemist Dmitri Mendeleev and the French chemist Marcellin Berthelot. Abiogenic hypotheses were revived in the last half of the 20th century by Russian and Ukrainian scientists, who had little influence outside the Soviet Union because most of their research was published in their native languages. The theory was re-defined and made popular in the West by Thomas Gold, who published all his research in English.[1]

Although the abiogenic hypothesis was accepted by many geologists in the former Soviet Union, it allegedly fell out of favor because it never made any useful prediction for the discovery of oil deposits.[1] Most geologists now consider the abiogenic formation of petroleum scientifically unsupported.[1] The abiogenic origin of petroleum has also recently been reviewed in detail by Glasby, who raises a number of objections, including that there is no direct evidence to date of abiogenic petroleum (liquid crude oil and long-chain hydrocarbon compounds).[1]

It has been recently discovered that thermophilic bacteria, in the sea bottom and in cooling magma, produce methane and hydrocarbon gases,[3][4] but studies indicate they are not produced in commercially significant quantities (i.e. in extracted hydrocarbon gases, the median abiogenic hydrocarbon content is 0.02%).[5]


History of abiogenic hypothesis

The abiogenic theory for the origin of petroleum is usually traced to the early part of the 19th century. The hypothesis was developed well before the field of organic chemistry, much less that of biochemistry, was established so the chemical nature of the petroleum was not known. Absent intellectual framework of organic and biological chemistry, abiologic theories were inevitable. In the early 19th century, Phlogiston theory was the dominant model for explaining chemical phenomena. Furthermore, the formal study of paleontology had only started in the early 19th century. It is within this scientifically primitive but changing environment that theories on the origin of petroleum originated.

Alexander von Humboldt was the first to propose an inorganic abiogenic hypothesis for petroleum formation after he observed petroleum springs in the Bay of Cumaux (Cumaná) on the northeast coast of Venezuela.[6] In 1804 he is quoted as saying, "petroleum is the product of a distillation from great depth and issues from the primitive rocks beneath which the forces of all volcanic action lie." Abraham Gottlob Werner and the proponents of neptunism in the 18th century believed basaltic sills to be solidified oils or bitumen. While these notions have been proven unfounded, the basic idea that petroleum is associated with magmatism persisted. Other prominent proponents of what would become the abiogenic hypothesis included Mendeleev[7] and Berthelot.

Russian geologist Nikolai Alexandrovitch Kudryavtsev proposed the modern abiotic hypothesis of petroleum in 1951. On the basis of his analysis of the Athabasca Oil Sands in Alberta, Canada, he concluded that no "source rocks" could form the enormous volume of hydrocarbons, and that therefore the most plausible explanation is abiotic deep petroleum. However, humic coals have since been proposed for the source rocks.[8] Kudryavtsev's work was continued by Petr N. Kropotkin, Vladimir B. Porfir'ev, Emmanuil B. Chekaliuk, Vladilen A. Krayushkin, Georgi E. Boyko, Georgi I. Voitov, Grygori N. Dolenko, Iona V. Greenberg, Nikolai S. Beskrovny, and Victor F. Linetsky.

Astronomer Thomas Gold was the most prominent proponent of the abiogenic hypothesis in the West until his death in 2004.[1] Currently, Jack Kenney of Gas Resources Corporation is a prominent proponent in the West.[9][10][11]

State of current research

Little research is directed on establishing abiogenic petroleum or methane, although the Carnegie Institution for Science have found that ethane and heavier hydrocarbons can be synthesized under conditions of the upper mantle.[12] Research mostly related to astrobiology and the deep microbial biosphere and serpentinite reactions, however, continue to provide insight into the contribution of abiogenic hydrocarbons into petroleum accumulations.

  • rock porosity and migration pathways for abiogenic petroleum [13]
  • ocean floor hydrothermal vents as in the Lost City hydrothermal field;
  • Mud volcanoes and the volatile contents of deep pelagic oozes and deep formation brines
  • mantle peridotite serpentinization reactions and other natural Fischer-Tropsch analogs
  • Primordial hydrocarbons in meteorites, comets, asteroids and the solid bodies of the solar system
    • Primordial or ancient sources of hydrocarbons or carbon in Earth [14][15]
      • Primordial hydrocarbons formed from hydrolysis of metal carbides of the iron peak of cosmic elemental abundance (Cr, Fe, Ni, V, Mn, Co) [16]
  • isotopic studies of groundwater reservoirs, sedimentary cements, formation gases and the composition of the noble gases and nitrogen in many oil fields
  • the geochemistry of petroleum and the presence of trace metals related to Earth's mantle (Ni, V, Cd, As, Pb, Zn, Hg and others)

Similarly, research into the deep microbial hypothesis of hydrocarbon generation is advancing as part of the attempt to investigate the concept of panspermia and astrobiology, specifically using deep microbial life as an analog for life on Mars. Research applicable to deep microbial petroleum theories includes

  • Research into how to sample deep reservoirs and rocks without contamination
  • Sampling deep rocks and measuring chemistry and biological activity [17]
  • Possible energy sources and metabolic pathways which may be used in a deep biosphere [18][4]
  • Investigations into the reworking primordial hydrocarbons by bacteria and their effects on carbon isotope fractionation

A 2006 review article by Glasby presented arguments against the abiogenic origin of petroleum on a number of counts.[1]

Foundations of the hypotheses

Within the mantle, carbon may exist as hydrocarbons, chiefly methane and as elemental carbon, carbon dioxide and carbonates.[11] The abiotic hypothesis is that the full suite of hydrocarbons found in petroleum can be generated in the mantle by abiogenic processes,[11] and these hydrocarbons can migrate out of the mantle into the crust until they escape to the surface or are trapped by impermeable strata, forming petroleum reservoirs.

Abiogenic theories reject the supposition that certain molecules found within petroleum, known as biomarkers, are indicative of the biological origin of petroleum. They contend that these molecules mostly come from microbes feeding on petroleum in its upward migration through the crust, that some of them are found in meteorites, which have presumably never contacted living material, and that some can be generated abiogenically by plausible reactions in petroleum.[10]

The hypothesis is founded primarily upon:

Proponents Item
Gold The presence of methane on other planets, meteors, moons and comets [19][20]
Gold, Kenney Proposed mechanisms of abiotically chemically synthesizing hydrocarbons within the mantle [9][10][11]
Kudryavtsev, Gold Hydrocarbon-rich areas tend to be hydrocarbon-rich at many different levels[2]
Kudryavtsev, Gold Petroleum and methane deposits are found in large patterns related to deep-seated large-scale structural features of the crust rather than to the patchwork of sedimentary deposits [2]
Gold Interpretations of the chemical and isotopic composition of natural petroleum [2]
Kudryavtsev, Gold The presence of oil and methane within non-sedimentary rocks upon the Earth [21]
Gold The existence of methane hydrate deposits [2]
Gold Perceived ambiguity in some assumptions and key evidence used in the orthodox biogenic petroleum theories [2][9]
Gold Bituminous coal creation is based upon deep hydrocarbon seeps [2]
Gold Surface carbon budget and oxygen levels stable over geologic time scales[2]
Kudryavtsev, Gold Biogenic theories do not explain some hydrocarbon deposit characteristics[2]
Szatmari The distribution of metals in crude oils fits better with upper serpentinized mantle, primitive mantle and chondrite patterns than oceanic and continental crust, and show no correlation with sea water[22]
Gold The association of hydrocarbons with helium, a noble gas[2]

Conventional theories

According to generally accepted theory, petroleum is derived from ancient biomass.[23] The theory was initially based on the isolation of molecules from petroleum that closely resemble known biomolecules (Figure).

Structure of a biomarker extracted from petroleum and simplified structure of chlorophyll a.

Most petroleum geologists prefer theories of oil formation, which holds that oil originated in shallow seas as vast quantities of marine plankton or plant materials died and sank into the mud. Under the resulting anaerobic conditions organic compounds remained in a reduced state where anaerobic bacteria converted the lipids (fats, oils and waxes) into a waxy substance called kerogen.

As the source rock was buried deeper, overburden pressure raised temperatures into the oil window, between 80 and 180 °C. Most of the organic compounds degraded into the straight-chain hydrocarbons that comprise most of petroleum. This process is called the generation kitchen.[citation needed] Once crude oil formed, it became very fluid and migrated upward through the rock strata. This process is called oil expulsion. Eventually it was either trapped in an oil reservoir or oil escaped to the surface and was biodegraded by soil bacteria.

Oil buried deeper entered the "gas window" of more than 160 °C and was converted into natural gas by thermal cracking. Thus, theory predicts that no oil will be found below a certain depth, only unassociated gas. At greater depths, even natural gas would be pyrolyzed.

Proposed mechanisms of abiogenic petroleum

Primordial deposits

Thomas Gold's work was focused on hydrocarbon deposits of primordial origin. Meteorites are believed to represent the major composition of material from which the Earth was formed. Some meteorites, such as carbonaceous chondrites, contain carbonaceous material. If a large amount of this material is still within the Earth, it could have been leaking upward for billions of years. The thermodynamic conditions within the mantle would allow many hydrocarbon molecules to be at equilibrium under high pressure and high temperature. Although molecules in these conditions may disassociate, resulting fragments would be reformed due to the pressure. An average equilibrium of various molecules would exist depending upon conditions and the carbon-hydrogen ratio of the material.[24]

Creation within the mantle

Russian researchers concluded that hydrocarbon mixes would be created within the mantle. Experiments under high temperatures and pressures produced many hydrocarbons, including n-alkanes through C10H22, from iron oxide, calcium carbonate, and water.[11] Because such materials are in the mantle and in subducted crust, there is no requirement that all hydrocarbons be produced from primordial deposits.

Hydrogen generation

Hydrogen gas and water have been found more than 6 kilometers deep in the upper crust, including in the Siljan Ring boreholes and the Kola Superdeep Borehole. Data from the western United States suggests that aquifers from near the surface may extend to depths of 10 to 20 km. Hydrogen gas can be created by water reacting with silicates, quartz and feldspar, in temperatures in the 25° to 270°C range. These minerals are common in crustal rocks such as granite. Hydrogen may react with dissolved carbon compounds in water to form methane and higher carbon compounds.[25]

One reaction not involving silicates which can create hydrogen is:

Ferrous oxide + Water → Magnetite + hydrogen

3FeO + H_2O \rarr Fe_3O_4 + H_2

The above reaction operates best at low pressures. At pressures greater than 5 GPa almost no hydrogen is created.[14]

Serpentinite mechanism

One proposed mechanism by which abiogenic petroleum is formed was first proposed by the Ukrainian scientist, Prof. Emmanuil B. Chekaliuk in 1967. He proposed that petroleum could be formed at high temperatures and pressures from inorganic carbon in the form of carbon dioxide, hydrogen and/or methane.

This mechanism is supported by several lines of evidence which are accepted by modern scientific literature. This involves synthesis of oil within the crust via catalysis by chemically reductive rocks. A proposed mechanism for the formation of inorganic hydrocarbons[26] is via natural analogs of the Fischer-Tropsch process known as the serpentinite mechanism or the serpentinite process.[22][27]

CH_4 + \begin{matrix} \frac{1}{2} \end{matrix}O_2 \rarr 2 H_2 + CO
(2n+1)H_2 + nCO \rarr C_nH_{2n+2} + nH_2O

Serpentinites are ideal rocks to host this process as they are formed from peridotites and dunites, rocks which contain greater than 80% olivine and usually a percentage of Fe-Ti spinel minerals. Most olivines also contain high nickel concentrations (up to several percent) and may also contain chromite or chromium as a contaminant in olivine, providing the needed transition metals.

However, serpentinite synthesis and spinel cracking reactions require hydrothermal alteration of pristine peridotite-dunite, which is a finite process intrinsically related to metamorphism, and further, requires significant addition of water. Serpentinite is unstable at mantle temperatures and is readily dehydrated to granulite, amphibolite, talcschist and even eclogite. This suggests that methanogenesis in the presence of serpentinites is restricted in space and time to mid-ocean ridges and upper levels of subduction zones. However, water has been found as deep as 12 km,[28] so water-based reactions are dependent upon the local conditions. Oil being created by this process in intracratonic regions is limited by the materials and temperature.

Serpentinite synthesis

A chemical basis for the abiotic petroleum process is the serpentinization of peridotite, beginning with methanogenesis via hydrolysis of olivine into serpentine in the presence of carbon dioxide.[27] Olivine, composed of Forsterite and Fayalite metamorphoses into serpentine, magnetite and silica by the following reactions, with silica from fayalite decomposition (reaction 1a) feeding into the forsterite reaction (1b).

Reaction 1a:
Fayalite + water → Magnetite + aqueous silica + Hydrogen

3Fe_2SiO_4 + 2H_2O \rarr 2Fe_3O_4 + 3SiO_2 + 2H_2

Reaction 1b:
Forsterite + aqueous silica → Serpentinite

3Mg_2SiO_4 + SiO_2 + 4H_2O \rarr 2Mg_3Si_2O_5(OH)_4

When this reaction occurs in the presence of dissolved carbon dioxide (carbonic acid) at temperatures above 500 °C Reaction 2a takes place.

Reaction 2a:
Olivine + Water + Carbonic acid → Serpentine + Magnetite + Methane

(Fe,Mg)_2SiO_4 + nH_2O + CO_2 \rarr Mg_3Si_2O_5(OH)_4 + Fe_3O_4 + CH_4

or, in balanced form: 18Mg2SiO4 + 6Fe2SiO4 + 26H2O + CO212Mg3Si2O5(OH)4 + 4Fe3O4 + CH4

However, reaction 2(b) is just as likely, and supported by the presence of abundant talc-carbonate schists and magnesite stringer veins in many serpentinised peridotites;

Reaction 2b:
Olivine + Water + Carbonic acid → Serpentine + Magnetite + Magnesite + Silica

(Fe,Mg)_2SiO_4 + nH_2O + CO_2 \rarr Mg_3Si_2O_5(OH)_4 + Fe_3O_4 + MgCO_3 + SiO_2

The upgrading of methane to higher n-alkane hydrocarbons is via dehydrogenation of methane in the presence of catalyst transition metals (e.g. Fe, Ni). This can be termed spinel hydrolysis.

Spinel polymerization mechanism

Magnetite, chromite and ilmenite are Fe-spinel group minerals found in many rocks but rarely as a major component in non-ultramafic rocks. In these rocks, high concentrations of magmatic magnetite, chromite and ilmenite provide a reduced matrix which may allow abiotic cracking of methane to higher hydrocarbons during hydrothermal events.

Chemically reduced rocks are required to drive this reaction and high temperatures are required to allow methane to be polymerized to ethane. Note that reaction 1a, above, also creates magnetite.

Reaction 3:
Methane + Magnetite → Ethane + Hematite

nCH_4 + nFe_3O_4 + nH_2O \rarr C_2H_6 + Fe_2O_3 + HCO_3 + H^+

Reaction 3 results in n-alkane hydrocarbons, including linear saturated hydrocarbons, alcohols, aldehydes, ketones, aromatics, and cyclic compounds.[27]

Carbonate decomposition

Calcium carbonate may decompose at around 500 °C through the following reaction:[14]

Reaction 5:
Hydrogen + Calcium carbonate → Methane + Calcium oxide + Water

4H_2 + CaCO_3 \rarr CH_4 + CaO + 2H_2O

Note that CaO (lime) is not a mineral species found within natural rocks. Whilst this reaction is possible, it is not plausible.

Evidence of abiogenic mechanisms

  • Calculations by J.F. Kenney using scaled particle theory for a simplified perturbed hard-chain, (a statistical mechanical model) predict that methane compressed to 30 or 40 kbar at 1000 °C (conditions in the mantle) is relatively unstable in relation to higher hydrocarbons. However, these calculations do not include methane pyrolisis yielding amorphous carbon and hydrogen, which is recognized as the prevalent reaction at high temperatures.[10][11]
  • Experiments in diamond anvil high pressure cells have resulted in partial conversion of methane and inorganic carbonates into light hydrocarbons.[11]

Biotic (microbial) hydrocarbons

The "deep biotic petroleum hypothesis", similar to the abiogenic petroleum origin hypothesis, holds that not all petroleum deposits within the Earth's rocks can be explained purely according to the orthodox view of petroleum geology. Thomas Gold used the term the deep hot biosphere to describe the microbes which live underground.[2][29][30]

This hypothesis is different from biogenic oil in that the role of deep-dwelling microbes is a biological source for oil which is not of a sedimentary origin and is not sourced from surface carbon. Deep microbial life is only a contaminant of primordial hydrocarbons. Parts of microbes yield molecules as biomarkers.

Deep biotic oil is considered to be formed as a byproduct of the life cycle of deep microbes. Shallow biotic oil is considered to be formed as a byproduct of the life cycles of shallow microbes.

Microbial biomarkers

Thomas Gold, in a 1999 book, cited the discovery of thermophile bacteria in the Earth's crust as new support for the postulate that these bacteria could explain the existence of certain biomarkers in extracted petroleum.[2] Thorough rebuttal of biogenic origins based on biomarkers has been offered by Kenney, et al. (2001).[1][10]

Isotopic evidence

Methane is ubiquitous in crustal fluid and gas.[4] Research continues to attempt to characterise crustal sources of methane as biogenic or abiogenic using carbon isotope fractionation of observed gases (Lollar & Sherwood 2006). There are few clear examples of abiogenic methane-ethane-butane, as the same processes favor enrichment of light isotopes in all chemical reactions, whether organic or inorganic. δ13C of methane overlaps that of inorganic carbonate and graphite in the crust, which are heavily depleted in 12C, and attain this by isotopic fractionation during metamorphic reactions.

One argument for abiogenic oil cites the high carbon depletion of methane as stemming from the observed carbon isotope depletion with depth in the crust. However, diamonds, which are definitively of mantle origin, are not as depleted as methane, which implies that methane carbon isotope fractionation is not controlled by mantle values.[31]

Commercially extractable concentrations of helium (greater than 0.3%) are present in natural gas from the Panhandle-Hugoton fields in the USA, as well as from some Algerian and Russian gas fields.[32][33]

Helium trapped within most petroleum occurrences, such as the occurrence in Texas, is of a distinctly crustal character with an Ra ratio of less than 0.0001 that of the atmosphere.[34][35]

The Chimaera gas seep, near Antalya (SW Turkey), new and thorough molecular and isotopic analyses including methane (~87% v/v; D13C1 from -7.9 to -12.3 ‰; D13D1 from -119 to -124 ‰), light alkanes (C2+C3+C4+C5 = 0.5%; C6+: 0.07%; D13C2 from -24.2 to -26.5 ‰; D13C3 from -25.5 to -27 ‰), hydrogen (7.5 to 11 %), carbon dioxide (0.01-0.07%; D13CCO2: -15 ‰), helium (~80 ppmv; R/Ra: 0.41) and nitrogen (2-4.9%; D15N from -2 to -2.8 ‰) converge to indicate that the seep releases a mixture of organic thermogenic gas, related to mature Type III kerogen occurring in Paleozoic and Mesozoic organic rich sedimentary rocks, and abiogenic gas produced by low temperature serpentinization in the Tekirova ophiolitic unit.[36] [1]

Biomarker chemicals

Certain chemicals found in naturally occurring petroleum contain chemical and structural similarities to compounds found within many living organisms. These include terpenoids, terpenes, pristane, phytane, cholestane, chlorins and porphyrins, which are large, chelating molecules in the same family as heme and chlorophyll. Materials which suggest certain biological processes include tetracyclic diterpane and oleanane.

The presence of these chemicals in crude oil is assumed to be as a result of the inclusion of biological material in the oil. This is predicated upon the theory that these chemicals are released by kerogen during the production of hydrocarbon oils, as these are chemicals highly resistant to degradation and plausible chemical paths have been studied. Abiotic defenders state that biomarkers get into oil during its way up as it gets in touch with ancient fossils. However a more plausible explanation is that biomarkers are traces of biological molecules from bacteria (archaea) that feed on primordial hydrocarbons and die in that environment. For example, hopanoids are just parts of the bacterial cell wall present in oil as contaminant.[2]

Trace metals

Nickel (Ni), vanadium (V), lead (Pb), arsenic (As), cadmium (Cd), mercury (Hg) and others metals frequently occur in oils. Some heavy crude oils, such as Venezuelan heavy crude have up to 45% vanadium pentoxide content in their ash, high enough that it is a commercial source for vanadium. Abiotic supporters argue that these metals are common in Earth's mantle, but relatively high contents of nickel, vanadium, lead and arsenic can be usually found in almost all marine sediments.

Analysis of 22 trace elements in oils correlate significantly better with chondrite, serpentinized fertile mantle peridotite, and the primitive mantle than with oceanic or continental crust, and shows no correlation with seawater.[22]

Reduced carbon

Sir Robert Robinson studied the chemical makeup of natural petroleum oils in great detail, and concluded that they were mostly far too hydrogen-rich to be a likely product of the decay of plant debris, assuming a dual origin for Earth hydrocarbons.[24] However, several processes which generate hydrogen could supply kerogen hydrogenation which is compatible with conventional petroleum generation theories.[37]

Olefins, the unsaturated hydrocarbons, would have been expected to predominate by far in any material that was derived in that way. He also wrote: "Petroleum ... [seems to be] a primordial hydrocarbon mixture into which bio-products have been added."

This has however been demonstrated later to be a misunderstanding by Robinson, related to the fact that only short duration experiments were available to him. Olefins are thermally very unstable (that is why natural petroleum normally does not contain such compounds) and in laboratory experiments that last more than a few hours, the olefins are no longer present.[citation needed]

The presence of low-oxygen and hydroxyl-poor hydrocarbons in natural living media is supported by the presence of natural waxes (n=30+), oils (n=20+) and lipids in both plant matter and animal matter, for instance fats in phytoplankton, zooplankton and so on. These oils and waxes, however, occur in quantities too small to significantly affect the overall hydrogen/carbon ratio of biological materials. However, after the discovery of highly aliphatic biopolymers in algae, and that oil generating kerogen essentially represent concentrates of such materials, no theoretical problem exists anymore.[citation needed] Also, the millions of source rock samples that have been analyzed for petroleum yield by the petroleum industry have confirmed the large quantities of petroleum found in sedimentary basins.

Field observations

Field observations sometimes cited as commercial occurrence of abiotic petroleum, but disputed by critics, include the Siljan Ring, offshore Vietnam, Eugene Island block 330 oil field, and the Dnieper-Donets Basin.[1][38] The Russian-Ukrainian school saw evidence of their theory in the fact that some oil reservoirs exist in non-sedimentary rocks such as granite, metamorphic or porous volcanic rocks. However, critics note that non-sedimentary rocks served as reservoirs for oil expelled from nearby sedimentary source rock through common migration or re-migration mechanisms.[38]

The following observations have been commonly been used to argue for the abiogenic hypothesis, however all of these petroleum occurrences can also be fully explained by conventional petroleum formation theories.[38]

Lost City Hydrothermal Vent Field

The Lost City Hydrothermal Vent Field was determined to have abiogenic hydrocarbon production. Proskurowski et al. wrote, "Radiocarbon evidence rules out seawater bicarbonate as the carbon source for FTT reactions, suggesting that a mantle-derived inorganic carbon source is leached from the host rocks. Our findings illustrate that the abiotic synthesis of hydrocarbons in nature may occur in the presence of ultramafic rocks, water, and moderate amounts of heat."[39]

Siljan Ring, Sweden

The Siljan Ring meteorite crater, Sweden, was proposed by Thomas Gold as the most likely place to test the hypothesis because it was one of the few places in the world where the granite basement was cracked sufficiently (by meteorite impact) to allow oil to seep up from the mantle; furthermore it is infilled with a relatively thin veneer of sediment, which was sufficient to trap any abiogenic oil, but was modelled as not having been subjected to the heat and pressure conditions (known as the "oil window") normally required to create biogenic oil. However, some geochemists concluded by geochemical analysis that the oil in the seeps came from the organic-rich Ordivician Tretaspis shale, where it was heated by the meteorite impact.[40]

The Gravberg-1 borehole penetrated 7,500 m, through the deepest rock in the Siljan Ring in which proponents had hoped to find hydrocarbon reservoirs. Some eight barrels of magnetite paste and hydrocarbon-bearing sludge were recovered from the well; Gold maintained that the hydrocarbons were chemically different from, and not derived from, those added to the borehole, but analyses showed that the hydrocarbons were derived from the diesel fuel-based drilling fluid used in the drilling.[41][42][43][44] This well also sampled over 13,000 feet (4,000 m) of methane-bearing inclusions.[45]

A second borehole, Stenberg-1, was drilled a few miles away, finding similar results,[31][42] This time no diesel fuel-based drilling fluid was found.

Bacterial mats

Direct observation of bacterial mats and fracture-fill carbonate and humin of bacterial origin in deep boreholes in Iran, Australia,[46] Sweden and Canada are also taken as evidence for the abiogenic origin of petroleum

Example proposed abiogenic methane deposits

Panhandle-Hugoton field (Anadarko Basin) in the south-central United States is the most important gas field with commercial helium content.[34][35][47][48]

The Bạch Hổ oil field in Vietnam has been proposed as an example of abiogenic oil because it is 4,000 m of fractured basement granite, at a depth of 5,000 m.[49] However, others argue that it contains biogenic oil which leaked into the basement horst from conventional source rocks within the Cuu Long basin.[21][50]

A major component of mantle-derived carbon is indicated in commercial gas reservoirs in the Pannonian and Vienna basins of Hungary and Austria.[51]

Natural gas pools interpreted as being mantle-derived are the Shengli Field[52] and Songliao Basin, northeastern China.[53][54]

The Chimaera gas seep, near Çıralı, Antalya (southwest Turkey), has been continuously active for millennia and it is known to be the source of the first Olympic fire in the Hellenistic period. On the basis of chemical composition and isotopic analysis, the Chimaera gas is said to be about half biogenic and half abiogenic gas, the largest emission of biogenic methane discovered; deep and pressurized gas accumulations necessary to sustain the gas flow for millennia, posited to be from an inorganic source, may be present.[36] Local geology of Chimaera flames, at exact position of flames, reveals contact between serpentinized ophiolite and carbonate rocks. Fischer-Tropsch process can be suitable reaction to form hydrocarbons gases.

The geological argument for abiogenic oil

Given the known occurrence of methane and the probable catalysis of methane into higher atomic weight hydrocarbon molecules, the abiogenic hypothesis considers the following to be key observations in support;

  • The serpentinite synthesis, graphite synthesis and spinel catalysation models prove the process is viable [22][27]
  • The likelihood that abiogenic oil seeping up from the mantle is trapped beneath sediments which effectively seal mantle-tapping faults [26]
  • Mass-balance calculations for supergiant oilfields which argue that the calculated source rock could not have supplied the reservoir with the known accumulation of oil, implying deep recharge (Kudryavtsev, 1951)
  • The presence of hydrocarbons encapsulated in diamonds[citation needed]

Incidental evidence

The proponents of abiogenic oil use several arguments which draw on a variety of natural phenomena in order to support the hypothesis

  • The modelling of some researchers which shows the Earth was accreted at relatively low temperature, thereby perhaps preserving primordial carbon deposits within the mantle, to drive abiogenic hydrocarbon production [55]
  • The presence of methane within the gases and fluids of mid-ocean ridge spreading centre hydrothermal fields[56]

The geological argument against

Oil deposits are not directly associated with tectonic structures.

Key arguments against chemical reactions, such as the serpentinite mechanism, as being the major source of hydrocarbon deposits within the crust are;

  • The lack of available pore space within rocks as depth increases
    • This is contradicted by numerous studies which have documented the existence of hydrologic systems operating over a range of scales and at all depths in the continental crust.[57]
  • The lack of any hydrocarbon within the crystalline shield areas of the major cratons, especially around key deep seated structures which are predicted to host oil by the abiogenic hypothesis.[31] See Siljan Lake.
  • Limited evidence that major serpentinite belts underlie continental sedimentary basins which host oil
  • Lack of conclusive proof that carbon isotope fractionation observed in crustal methane sources is entirely of abiogenic origin (Lollar et al. 2006)[4]
  • Mass balance problems of supplying enough carbon dioxide to serpentinite within the metamorphic event before the peridotite is fully reacted to serpentinite
  • Drilling of the Siljan Ring failed to find commercial quantities of oil,[31] thus providing a counter example to Kudryavtsev's Rule[42] and failing to locate the predicted abiogenic oil.
  • Helium in the Siljan Gravberg-1 well was depleted in 3He and not consistent with a mantle origin[58]
    • The Gravberg-1 well only produced 84 barrels (13.4 m3) of oil, which later was shown to derive from organic additives, lubricants and mud used in the drilling process.[41][42][43]
  • The distribution of sedimentary basins is caused by plate tectonics, with sedimentary basins forming on either side of a volcanic arc, which explains the distribution of oil within these sedimentary basins
  • Kudryavtsev's Rule has been explained for oil and gas (not coal): Gas deposits which are below oil deposits can be created from that oil or its source rocks. Because natural gas is less dense than oil, as kerogen and hydrocarbons are generating gas the gas fills the top of the available space. Oil is forced down, and can reach the spill point where oil leaks around the edge(s) of the formation and flows upward. If the original formation becomes completely filled with gas then all the oil will have leaked above the original location.[59]
  • Ubiquitous presence of diamondoids in natural hydrocarbons such as oil, gas and condensates are composed of carbon from biological sources, unlike the carbon found in normal diamonds.[60]

Arguments against the incidental evidence

  • Gas ruptures during earthquakes are more likely to be sourced from biogenic methane generated in unconsolidated sediment from existing organic matter, released by earthquake liquefaction of the reservoir during tremors
  • The presence of methane hydrate is arguably produced by bacterial action upon organic detritus falling from the littoral zone and trapped in the depth due to pressure and temperature
  • The likelihood of vast concentrations of methane in the mantle is very slim, given mantle xenoliths have negligible methane in their fluid inclusions; conventional plate tectonics explains deep focus quakes better, and the extreme confining pressures invalidate the hypothesis of gas pockets causing quakes
  • Further evidence is the presence of diamond within kimberlites and lamproites which sample the mantle depths proposed as being the source region of mantle methane (by Gold et al.).[24]

See also


  1. ^ a b c d e f g h i j Glasby, Geoffrey P. (2006). "Abiogenic origin of hydrocarbons: an historical overview" (PDF). Resource Geology 56 (1): 83–96. doi:10.1111/j.1751-3928.2006.tb00271.x. http://static.scribd.com/docs/j79lhbgbjbqrb.pdf. Retrieved 2008-02-17. 
  2. ^ a b c d e f g h i j k l m Gold, Thomas (1999). The deep, hot biosphere. Copernicus Books. ISBN 0-387-98546-8. 
  3. ^ Lollar, Sherwood et al. 2002. Abiogenic formation of alkanes in the Earth's crust as a minor source for global hydrocarbon reservoirs. Nature, 416, pp522-524. Abstract
  4. ^ a b c d B. Sherwood Lollar; G. Lacrampe-Couloume, et al. (February 2006). "Unravelling abiogenic and biogenic sources of methane in the Earth's deep subsurface". Chemical Geology 226 (3–4): 328–339. doi:10.1016/j.chemgeo.2005.09.027. 
  5. ^ Jenden, P.D. ; Kaplan, I.R. ; Hilton, D.R. ; Craig, H. (1 January 1993). "Abiogenic hydrocarbons and mantle helium in oil and gas fields". United States Geological Survey 1570. http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=7052010  Document #7052010 in Energy Citations Database (ECD)
  6. ^ Sadtler, The Genesis and Chemical Relations of Petroleum and Natural Gas, 1897
  7. ^ Mendeleev, D., 1877. L'origine du petrole. Revue Scientifique, 2e Ser., VIII, p. 409-416.
  8. ^ Stanton (2005)
  9. ^ a b c Kenney, J.F.; I. K. Karpov I.K., Shnyukov Ac. Ye. F., Krayushkin V.A., Chebanenko I.I., Klochko V.P. (2002). "The Constraints of the Laws of Thermodynamics upon the Evolution of Hydrocarbons: The Prohibition of Hydrocarbon Genesis at Low Pressures.". http://www.gasresources.net/ThrmcCnstrnts.htm. Retrieved 2006-08-16. 
  10. ^ a b c d e Kenney, J., Shnyukov, A., Krayushkin, V., Karpov, I., Kutcherov, V. and Plotnikova, I. (2001). "Dismissal of the claims of a biological connection for natural petroleum". Energia 22 (3): 26–34.  Article link
  11. ^ a b c d e f g Kenney, J., Kutcherov, V., Bendeliani, N. and Alekseev, V. (2002). "The evolution of multicomponent systems at high pressures: VI. The thermodynamic stability of the hydrogen–carbon system: The genesis of hydrocarbons and the origin of petroleum". Proceedings of the National Academy of Sciences 99 (17): 10976–10981. arXiv:physics/0505003. Bibcode 2002PNAS...9910976K. doi:10.1073/pnas.172376899. PMC 123195. PMID 12177438. http://www.pnas.org/cgi/content/full/99/17/10976. Retrieved 2006-10-04. 
  12. ^ Hydrocarbons in the deep Earth? July 2009 news release.
  13. ^ Kitchka, A., 2005. Juvenile Petroleum Pathway: From Fluid Inclusions via Tectonic Pathways to Oil Fields. AAPG Research Conference, Calgary, Canada, 2005.Abstract
  14. ^ a b c Scott HP; Hemley RJ, Mao HK, Herschbach DR, Fried LE, Howard WM, Bastea S. (September 2004). "Generation of methane in the Earth's mantle: in situ high pressure-temperature measurements of carbonate reduction". Proc Natl Acad Sci 101 (39): 14023–6. Bibcode 2004PNAS..10114023S. doi:10.1073/pnas.0405930101. PMC 521091. PMID 15381767. http://www.pnas.org/cgi/content/abstract/0405930101v1. Retrieved 2006-08-16. 
  15. ^ Thomas Stachel; Anetta Banas, Karlis Muehlenbachs, Stephan Kurszlaukis and Edward C. Walker (June 2006). "Archean diamonds from Wawa (Canada): samples from deep cratonic roots predating cratonization of the Superior Province". Contributions to Mineralogy and Petrology 151 (6): 737–750. Bibcode 2006CoMP..151..737S. doi:10.1007/s00410-006-0090-7. 
  16. ^ Franco Cataldo (January 2003). "Organic matter formed from hydrolysis of metal carbides of the iron peak of cosmic elemental abundance". International Journal of Astrobiology 2 (1): 51–63. Bibcode 2003IJAsB...2...51C. doi:10.1017/S1473550403001393. 
  17. ^ Thomas L. Kieft; Sean M. McCuddy, T. C. Onstott, Mark Davidson, Li-Hung Lin, Bianca Mislowack, Lisa Pratt, Erik Boice, Barbara Sherwood Lollar, Johanna Lippmann-Pipke, Susan M. Pfiffner, Tommy J. Phelps, Thomas Gihring, Duane Moser, Arnand van Heerden (September 2005). "Geochemically Generated, Energy-Rich Substrates and Indigenous Microorganisms in Deep, Ancient Groundwater". Geomicrobiology Journal 22 (6): 325–335. doi:10.1080/01490450500184876. 
  18. ^ Li-Hung Lin; Greg F. Slater, Barbara Sherwood Lollar, Georges Lacrampe-Coulome, and T.C. Onstott (February 2005). "The yield and isotopic composition of radiolytic H2, a potential energy source for the deep subsurface biosphere". Geochimica et Cosmochimica Acta 69 (4): 893–903. Bibcode 2005GeCoA..69..893L. doi:10.1016/j.gca.2004.07.032. 
  19. ^ Hodgson, G. and Baker, B. (1964). "Evidence for porphyrins in the Orgueil meteorite". Nature 202 (4928): 125–131. Bibcode 1964Natur.202..125H. doi:10.1038/202125a0. 
  20. ^ Hodgson, G. and Baker, B. (1964). "Porphyrin abiogenesis from pyrole and formaldehyde under simulated geochemical conditions". Nature 216 (5110): 29–32. Bibcode 1967Natur.216...29H. doi:10.1038/216029a0. PMID 6050667. 
  21. ^ a b Brown, David (2005). "Vietnam finds oil in the basement". AAPG Explorer 26 (2): 8–11.  Abstract
  22. ^ a b c d Szatmari, P, Da Fonseca, T, and Miekeley, N. Trace Element Evidence for Major Contribution to Commercial Oils by Serpentinizing Mantle Peridotites. AAPG Research Conference, Calgary, Canada, 2005. Abstract
  23. ^ Keith A. Kvenvolden "Organic geochemistry – A retrospective of its first 70 years" Organic Geochemistry 37 (2006) 1–11. doi:10.1016/j.orggeochem.2005.09.001
  24. ^ a b c Thomas Gold (1993). The Origin of Methane (and Oil) in the Crust of the Earth, U.S.G.S. Professional Paper 1570, The Future of Energy Gases. USGS. http://web.archive.org/web/20021015163818/www.people.cornell.edu/pages/tg21/usgs.html. Retrieved 2006-10-10. 
  25. ^ G.J. MacDonald (1988). "Major Questions About Deep Continental Structures". In A. Bodén and K.G. Eriksson. Deep drilling in crystalline bedrock, v. 1. Berlin: Springer-Verlag. pp. 28–48. ISBN 3-540-18995-5. 
  26. ^ a b Keith, S., Swan, M. 2005. Hydrothermal Hydrocarbons. AAPG Research Conference, Calgary, Canada, 2005. Abstract
  27. ^ a b c d J. L. Charlou, J. P. Donval, P. Jean-Baptiste, D. Levaché, Y. Fouquet, J. P. Foucher, P. Cochonat, 2005. Abiogenic Petroleum Generated by Serpentinization of Oceanic Mantellic Rocks. AAPG Research Conference, Calgary, Canada, 2005.
  28. ^ S. B. Smithson; F. Wenzel, Y. V. Ganchin and I. B. Morozov (2000-12-31). "Seismic results at Kola and KTB deep scientific boreholes: velocities, reflections, fluids, and crustal composition". Tectonophysics 329 (1–4): 301–317. Bibcode 2000Tectp.329..301S. doi:10.1016/S0040-1951(00)00200-6. 
  29. ^ Thomas Gold (1992). "The Deep, Hot Biosphere". PNAS 89 (13): 6045–6049. Bibcode 1992PNAS...89.6045G. doi:10.1073/pnas.89.13.6045. PMC 49434. PMID 1631089. http://www.pnas.org/cgi/content/abstract/89/13/6045. Retrieved 2006-09-27. 
  30. ^ Gold, Thomas (July 1992). "The Deep, Hot Biosphere". Archived from the original on 2002-10-04. http://web.archive.org/web/20021004123112/http://www.people.cornell.edu/pages/tg21/DHB.html. Retrieved 2006-09-27. 
  31. ^ a b c d M. R. Mello and J. M. Moldowan (2005). Petroleum: To Be Or Not To Be Abiogenic. AAPG Research Conference, Calgary, Canada, 2005. Abstract
  32. ^ http://minerals.usgs.gov/minerals/pubs/commodity/helium/330495.pdf Helium USGS - By Joseph B. Peterson
  33. ^ http://minerals.usgs.gov/minerals/pubs/commodity/helium/mcs-2011-heliu.pdf Helium 2011 USGS
  34. ^ a b Weinlich, F.H.; Brauer K., Kampf H., Strauch G., J Tesar and S.M. Weise (1999). "An active subcontinental mantle volatile system in the western Eger rift, Central Europe: Gas flux, isotopic (He, C and N) and compositional fingerprints - Implications with respect to the degassing processes". Geochimica et Cosmochimica Acta 63 (21): 3653–3671. Bibcode 1999GeCoA..63.3653W. doi:10.1016/S0016-7037(99)00187-8. 
  35. ^ a b B.G.Polyak; I.N. Tolstikhin, I.L. Kamensky, L.E. Yakovlev, B. Marty and A.L. Cheshko (2000). "Helium isotopes, tectonics and heat flow in the Northern Caucasus". Geochimica et Cosmochimica Acta 64 (11): 1924–1944. Bibcode 2000GeCoA..64.1925P. doi:10.1016/S0016-7037(00)00342-2. 
  36. ^ a b Hoşgörmez, H., Etiope, G., Yalçın, M.N., New evidence for a mixed inorganic and organic origin of the Olympic Chimaera fire (Turkey): a large onshore seepage of abiogenic gas. Geofluids. 8, 263-273, (2008)
  37. ^ Zhijun Jin; Liuping Zhang, Lei Yang and Wenxuan Hu (January 2004). "A preliminary study of mantle-derived fluids and their effects on oil/gas generation in sedimentary basins". Journal of Petroleum Science and Engineering 41 (1–3): 45–55. doi:10.1016/S0920-4105(03)00142-6. 
  38. ^ a b c Höök, M., Bardi, U., Feng, L., Pang, X., 2010. Development of oil formation theories and their importance for peak oil. Marine and Petroleum Geology, Volume 27, Issue 9, October 2010, Pages 1995–2004. See also: http://www.tsl.uu.se/uhdsg/Publications/Abiotic_article.pdf
  39. ^ Proskurowski Giora et al. (2008). "Abiogenic Hydrocarbon Production at Lost City Hydrothermal Field". Science 319 (5863): 604–607. doi:10.1126/science.1151194. PMID 18239121. http://www.sciencemag.org/cgi/content/short/319/5863/604. 
  40. ^ Kathy Shirley, "Siljan project stays in cross fire", AAPG Explorer, January 1987, p.12-13.
  41. ^ a b Jeffrey, A.W.A, Kaplan, I.R., 1989. Drilling fluid additives and artifact hydrocarbons shows: examples from the Gravberg-1 well, Siljan Ring, Sweden, Scientific Drilling, Volume 1, Pages 63-70
  42. ^ a b c d Kerr, R.A. (9 march 1990). "When a Radical Experiment Goes Bust". Science 247 (4947): 1177–1179. Bibcode 1990Sci...247.1177K. doi:10.1126/science.247.4947.1177 
  43. ^ a b Castano, J.R., 1993. Prospects for Commercial Abiogenic Gas Production: Implications from the Siljan Ring Area, Sweden, In: The future of energy gases: U.S. Geological Survey Professional Paper 1570, p. 133-154.
  44. ^ Alan Jeffrey and Isaac Kaplan, "Asphaltene-like material in Siljan Ring well suggests mineralized altered drilling fluid", Journal of Petroleum Technology, December 1989, p.1262–1263, 1310–1313. The authors conclude: "No evidence for an indigenous or deep source for the hydrocarbons could be justified."
  45. ^ Fluid Inclusion Volatile Well Logs of the Gravberg#1 Well, Siljan Ring, Sweden Michael P. Smith
  46. ^ Bons P. et al. (2004). "Fossil microbes in late proterozoic fibrous calcite veins from Arkaroola, South Australia". Geological Society of America Abstracts with Programs 36 (5): 475. 
  47. ^ Pippin, Lloyd (1970). "Panhandle-Hugoton Field, Texas-Oklahoma-Kansas--the First Fifty Years". Geology of Giant Petroleum Fields. pp. 204–222. http://search.datapages.com/data/specpubs/fieldst2/data/a009/a009/0001/0200/0204.htm. 
  48. ^ Gold, T., and M. Held, 1987, Helium-nitrogen-methane systematics in natural gases of Texas and Kansas: Journal of Petroleum Geology, v. 10, no. 4, p. 415–424.
  49. ^ Anirbid Sircar (2004-07-25). "Hydrocarbon production from fractured basement formations" (pdf). Current Science 87 (2): 147–151. http://www.ias.ac.in/currsci/jul252004/147.pdf. 
  50. ^ White Tiger oilfield, Vietnam. AAPG Review of CuuLong Basin and Seismic profile showing basement horst as trap for biogeic oil.
  51. ^ Lollara, B. Sherwood; C. J. Ballentineb and R. K. Onions (1997-06). "The fate of mantle-derived carbon in a continental sedimentary basin: Integration of C/He relationships and stable isotope signatures". Geochimica et Cosmochimica Acta 61 (11): 2295–2307. Bibcode 1997GeCoA..61.2295S. doi:10.1016/S0016-7037(97)00083-5. http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V66-3SWJH68-1T&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=bee722ceefac8870c425e31888931977. Retrieved 2008-06-06. 
  52. ^ JIN, Zhijun; ZHANG Liuping, ZENG Jianhui (2002-10-30). "Multi-origin alkanes related to CO2-rich, mantle-derived fluid in Dongying Sag, Bohai Bay Basin" (PDF). Chinese Science Bulletin 47 (20): 1756–1760. doi:10.1360/02tb9384. http://scholar.ilib.cn/A-ddgzyckx-e200402006.html. Retrieved 2008-06-06. 
  53. ^ Li, Zian; GUO Zhanqian, BAI Zhenguo, LIN Ge (2004). "Geochemistry And Tectonic Environment And Reservoir Formation Of Mantle-Derived Natural Gas In The Songliao Basin, Northeastern China". Geotectonica et Metallogenia. http://scholar.ilib.cn/A-ddgzyckx-e200402006.html. Retrieved 2008-06-06. 
  54. ^ "ABIOGENIC HYDROCARBON ACCUMULATIONS IN THE SONGLIAO BASIN, CHINA" (PDF). NATIONAL HIGH MAGNETIC FIELD LABORATORY. 2006. http://www.magnet.fsu.edu/mediacenter/publications/reports/2006annualreport/2006-NHMFL-Report431.pdf. Retrieved 2008-06-06. 
  55. ^ John W. Valley, William H. Peck, Elizabeth M.King, Simon A. Wilde (2002). "A Cool Early Earth". Geology 30 (4): 351–354. Bibcode 2002Geo....30..351V. doi:10.1130/0091-7613(2002)030<0351:ACEE>2.0.CO;2. ISSN 0091-7613.  "A Cool Early Earth". Zircons Are Forever. http://www.geology.wisc.edu/zircon/cool_early/cool_early_home.html. Retrieved 11 April 2005. 
  56. ^ Chapelle, F.H., O'Neill, K., Bradley, P.M., Methe, B.A., Ciufo, S.A., Knobel, L.L., and Lovley, D.R. (2002). "A hydrogen-based subsurface microbial community dominated by methanogens". Nature 415 (6869): 312–315. doi:10.1038/415312a. PMID 11797006. 
  57. ^ C. E. Manning; S. E. Ingebritsen (1999-02-01). "Permeability of the continental crust: implications of geothermal data and metamorphic systems". Reviews of Geophysics 37 (1): 127–150. Bibcode 1999RvGeo..37..127M. doi:10.1029/1998RG900002. 
  58. ^ A. W.A. Jeffrey; I. R. Kaplan and J. R. Castaño (1988). "Analyses of Gases in the Gravberg-1 Well". In A. Bodén and K.G. Eriksson. Deep drilling in crystalline bedrock, v. 1. Berlin: Springer-Verlag. pp. 134–139. ISBN 3-540-18995-5. 
  59. ^ Price, Leigh C. (1997). "Origins, Characteristics, Evidence For, and Economic Viabilities of Conventional and Unconventional Gas Resource Bases". Geologic controls of deep natural gas resources in the United States (USGS Bulletin 2146) (USGS): 181–207. http://pubs.er.usgs.gov/usgspubs/b/b2146. Retrieved 2006-10-12. 
  60. ^ Petroleum: To Be Or Not To Be Abiogenic, by M. R. Mello and J. M. Moldowan; #90043 (2005)


  • Kudryavtsev N.A., 1959. Geological proof of the deep origin of Petroleum. Trudy Vsesoyuz. Neftyan. Nauch. Issledovatel Geologoraz Vedoch. Inst. No.132, pp. 242–262 (Russian)

External links

Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Petroleum geology — refers to the specific set of geological disciplines that are applied to the search for hydrocarbons (oil exploration). edimentary basin analysisPetroleum geology is principally concerned with the evaluation of seven key elements in sedimentary… …   Wikipedia

  • Petroleum — For other uses, see Petroleum (disambiguation). Proven world oil reserves, 2009 …   Wikipedia

  • Petroleum industry — The distribution of oil and gas reserves among the world s 50 largest oil companies. The reserves of the privately owned companies are grouped together. The oil produced by the supermajor companies accounts for less than 15% of the total world… …   Wikipedia

  • Petroleum geologist — A petroleum geologist is an occupation that involves all aspects of oil discovery and production. Petroleum geologists are usually linked to the actual discovery of oil and the identification of possible oil deposits or leads. It can be a very… …   Wikipedia

  • Thomas Gold — Infobox Scientist name = Thomas Gold box width = birth date = May 22, 1920 birth place = Vienna, Austria death date = June 22, 2004 death place = residence = citizenship = nationality = Austrian ethnicity = field = astrophysics work institutions …   Wikipedia

  • Nikolai Kudryavtsev — Nikolai Alexandrovich Kudryavtsev Russian: Николай Александрович Кудрявцев (Opochka, October 21, 1893 Leningrad, December 12, 1971) was a Soviet Russian petroleum geologist. He is the founding father of modern abiogenic theory for origin of… …   Wikipedia

  • Vladimir Porfiriev — Vladimir Borisovich Porfiryev, ru. Владимир Борисович Порфирьев, (born June 26, 1899 in Vyatka, now Kirov, Russia; died January 30, 1982 in Kiev) was a Russian and Ukrainian petroleum and coal geologist.Porfiryev was one of the major proponents… …   Wikipedia

  • Diamondoid — A diamondoid, in the context of building materials for nanotechnology components, most generally refers to structures that resemble diamond in a broad sense: namely, strong, stiff structures containing dense, 3 D networks of covalent bonds,… …   Wikipedia

  • Dmitri Mendeleev — in 1897 Born 8 February 1834( …   Wikipedia

  • Fischer-Tropsch process — The Fischer Tropsch process (or Fischer Tropsch Synthesis) is a catalyzed chemical reaction in which synthesis gas (syngas), a mixture of carbon monoxide and hydrogen, is converted into liquid hydrocarbons of various forms. The most common… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”