Petroleum Geological Characteristics of Compresso-Shear Basin

Abstract

Abstract: The basin-formed mechanism, evolution model and petroliferous geological features of compresso-shear basins in the world are analyzed. by which six aspects of the features are summarized as follows: 1) in the compresso-shear process, the sedimentary speed of basin is high, forming thicker coarse-grained clastic rocks which normally shape good petroleum reservoir; 2) the source rocks of basin tend to coming from the organic matter-enriched rocks formed in pre-compresso-shear stages, except that in intense compresso-shear process, deep water-semi deep water source rocks are possibly developed in frontal of deep depression (fore deep) of thrust belt; 3) the en echelon folds (including anticline and fault-nose structure) are generally as good oil traps; 4) the compresso-shear process is helpful to hydrocarbon accumulation; 5) it may promote the maturity and hydrocarbon-generating process of organic matter, and 6) the thrust belts in the surrounding areas of compresso-shear basin are favorable domains for petroleum concentration.

Key words: compresso-shear basin, compresso-shear process, compresso-shear structural assemblage

CLC Number:

TE111.1

LIU Chuan-hu. Petroleum Geological Characteristics of Compresso-Shear Basin[J]. Xinjiang Petroleum Geology, 2006, 27(6): 647-653.

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