Lithogenesis and oil potential of Jurassic terrigenous deposits of the middle-latitude OB river region
- Institute of Geologic Sciences, Kiev (Ukraine)
The lithologic, mineralogical, and geochemical features of Jurassic terrigenous deposits of the Krasnoleninskii group of oil fields of Western Siberia are characterized. It is shown that the degree of their regional changes corresponds to the protocatagenesis-mesocatagenesis interval PC{sub 2}-MC{sub 1} and only to the start of the main phase of oil generation. At the same time pronounced fluctuations of the paleotemperature indices related to the repeated intrusion of hydrothermal fluids were noted. It was established that the formation of secondary oil reservoirs in Jurassic deposits is a multiphase metasomatic process, including tectono-geodynamic and hydrothermal alteration and oil saturation accompanied by various {open_quotes}near-oil{close_quotes} alterations of the enclosing strata and formation of a system of geophysical and geochemical anomalies.
- OSTI ID:
- 54863
- Journal Information:
- Lithology and Mineral Resources, Vol. 29, Issue 5; Other Information: PBD: May 1995; TN: Translated from Litologiya i Poleznye Iskopaemye, No. 5, 65-85(Sep-Oct 1994)
- Country of Publication:
- United States
- Language:
- English
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