Xinjiang Petroleum Geology ›› 2001, Vol. 22 ›› Issue (3): 185-188.

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Dominant Factors of Trap Formation and Their Distribution Charateristics in Tarim Basin

CHEN Zi-yuan   

  • Received:2000-10-25 Online:2001-06-01 Published:2020-08-14
  • About author:CHEN Zi-yuan(1947-), Male, Senior Engineer, Petroleum Geology, Research Institute of Exlporation of Jinzhou New District, Sinopec, Jinzhou, Hubei 434 100, China

Abstract: The types of traps in Tarim Basin are abundant. Several groups of structural belts or structural trap zones in Tarim basin are formed under the influence of Caledonian, early Hercynian, late Hercynian-Indo-China, Yanshan-Himalayan orogeny respectively. Non-structural traps such as formation truncation, formation overlapping pinchout, lithology, factes-changing belt, salt-body marginal depression and infilling etc. are the result of sedimentation, diagenesis, unconformity under the specific regional tectonic settings. During the prolonged time of evolution, through multistage structural activities, large palaeohighs, palaeoslopes and geotectogene were formed, which underwent horizontal and vertical structural migration, superposition and reconstruction, providing favorable geological settings for formation of multi-type non-structural traps. Combination traps are the result of joint control of tectonic activities and sedimentation. As the uplifts migrated constantly in horizontal direction, the depositional body varied with them, and the upper formations suffered from intense corrosion, while accumulating and packing in the flanks and lower parts of the uplifts, forming structural, unconformity, stratigraphic pinchout and lithological traps.

Key words: Tarim Basin, structural trap, non-structural trap, combination trap, distribution, control, condition

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