Sulfur- and Metal Content, Isotopic S and C- Geochemical Signs of Oil Genesis

Lurie, MA; Schmidt, FK

doi:10.15406/ipcse.2017.02.00030

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“…So, for example, its content in Astrakhan gas condensate (3-4 km depth) exceeds 24-25%. 1,20 The possible explanation of vertical spatial alteration of oil composition from the viewpoint of the theory of organic origin due to the destruction of oil structures contradicts to the data 21 on the increase of content of less stable sulfur-containing components with growth of depth.…”

Section: Vertical Zoning Of Bedding Of the Different Composition Oilsmentioning

confidence: 99%

Sulfur- and Metal Content, Isotopic S and C- Geochemical Signs of Oil Genesis

Lurie¹

2017

IPCSE

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Submit Manuscript | http://medcraveonline.com IntroductionOver the last decades, many evidences have been found to support the theory of organic origin of oil and gas. At the same time, a number of facts indicating the effects of endogenic factors on oil genesis are growing. The oil origin should be considered as a result of interaction of two different flows of matter and energy. The sources of oil components should include not only organic matter (OM), mineral skeleton of natural reservoir and stratal waters, but also deep endogenic fluids.1 Independently on the available opinions about oil origin, the researchers should explain the reasons causing the association of elements observed in oils. Are heteroelements, in particular S and metals, the "satellites" constituting the hydrocarbons system and imparting some specific properties to oil? Or these elements due to their reactivity play more significant role even on early stages of oil formation, thus determining its geochemical type? The latter assumption is supported by numerous evidences on stable direct correlations between concentrations of S, V+Ni, V, ratio V/ Ni, concentration of aromatic compounds, asphalt-resin components, values of viscosity and density.2 Within the framework of organic theory of oil origin it is difficult to find an approach to explain stability of these correlations, especially when these characteristics are widely ranged.The assumption of endogenic contribution to oil genesis prompts us to answer the question concerning the sources of carbon and heteroelements of abiogenic constituent of oil. Carbon could be found in endogenic fluids as carbon monoxide (CO), carbon dioxide (CO 2 ) and methane (CH 4 ). The widespread viewpoint about genesis of abiogenic oil suggests the possibility of hydrocarbons formation in the course of hydrogenation of carbon oxides by hydrogen, which is contained in deep fluids (Fischer-Tropsch synthesis). However, the proceeding of these reactions in earth crust is hindered by many reasons. The presence of hydrogen sulfide (H 2 S) and elemental sulfur (S 0 ) in some endogenic gas mixtures 3,4 inhibiting the FischerTropsch reactions 5 is the principal obstacle for realization of these processes. Besides, like in the case of organic theory of oil origin, substantial difficulties are connected with understanding the reasons of hereocomponents (which concentrations are changed according to the stable regularities mentioned) appearance in oil.On the basis of the existing notions on composition of endogenic fluids, containing along with hydrogen (H 2 ), CO and CO 2 a number of other components possessing reactivity, in particular, S 0 , we have put forward the hypothesis 6 that the starting reaction of the formation AbstractCurrently, a number of evidences witness the significant role of endogenic factors in oil and gas formation. It has been suggested that the components of endogenic fluids participate in the generation of oil systems. It is a common opinion that the most probable route of the formation of oils a...

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Section: Vertical Zoning Of Bedding Of the Different Composition Oilsmentioning

confidence: 99%