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MORPHOGENESIS AS A CRITERION OF EVOLUATION OF PRESENT-DAY CHANGE OF THE MESOZOIC-CENOZOIC COVER MORPHOLOGICAL STATE (CASE STUDY FOR THE KAYMYSOVSKY PETROLEUM REGION IN WESTERN SIBERIA)

P. S. Lapin

Trofimuk Institute of Petroleum Geology and Geophysics, Novosibirsk, Russia

The method of evaluation of modern morphological changes within the bounds of study of irregularity in occurrence of neotectonic movements of the Mesozoic-Cenozoic cover by the example of the Kaymysovsky petroleum region within the West-Siberian oil-and-gas province is suggested. This method is based on the several peculiarities of morphological evolution features of the earth surface reliefs, basement and Upper Jurassic deposits. They are distinguished in the present section of deposits on the ground of analysis of compartmentalization and contrast range of above-mentioned surfaces. The developed method allowed the author to confirm the previously made conclusion about not high petroleum potential of the south-western Kaymysovsky PR. It is shown that the irregularity of neotectonic movements leads to diff erentiation of the possible petroleum potential occurrence interval earlier distinguished in Upper Jurassic deposits. It is determined that the irregularity of neotectonic movements had the effect on producing of some wells. Some of them, located in the region with typical values of neotectonic movements, got into the area of modern relief formation processes with values less than typical. Obtained results allowed the author to come out with a suggestion on reduction of intensity of neotectonic movements through time that couldinfluence on degree of accumulation preservation within the exploration target.

Keywords: morphology, morphogenesis, irregularity in occurrences of neotectonic movements, Kaymysovsky PR.

DOI 10.20403/2078-0575-2018-2-24-35