深层油气藏成因类型及其特征

doi:10.11743/ogg20210514

Abstract

Abstract:

Significant oil and gas discoveries have been obtained in deep plays in succession, making the deep plays become an important strategic domain for oil and gas exploration both in China and around the world.However, we are not quite clear about its accumulation mechanism under the high-temperature and high-pressure environment, following long evolutionary history and complex organic-inorganic interactions.The deep plays could be divided into 3 types considering the major genesis, evolutionary history and accumulation characteristics, namely, plays of pre-deep-burial enrichment, plays of syn-deep-burial enrichment, and plays of post-deep-burial enrichment.Their genetic mechanism and main accumulation characteristics are sorted out and characterized.Meanwhile, the study focuses on the mysteries concerning source rocks and hydrocarbon generation of the deep plays; among others, the involvement of deep-sourced exogenous hydrogen, calcium-rich source materials and inorganic gas, is of great significance to hydrocarbon generation from high-to-over-mature organic matter.In all, discussion on the mechanism of deep hydrocarbon accumulation is sure to help lay a solid theoretical foundation to promote deep petroleum exploration and industrial development in China.

Key words: hydrocarbon generation mechanism, organic-inorganic interaction, exogenous hydrogen, carbonate sequence of high maturity, deep play, Tarim Basin, Ordos Basin

CLC Number:

TE122.3

Dongdong Zhang, Wenhui Liu, Xiaofeng Wang, Houyong Luo, Qingtao Wang, Yining Li, Fengjiao Li. Genetic types and characteristics of deep oil and gas plays[J]. Oil & Gas Geology, 2021, 42(5): 1169-1180.

Figures/Tables 6

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Genetic types and characteristics of deep oil and gas plays

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