Oil & Gas Geology ›› 2014, Vol. 35 ›› Issue (6): 914-924,949.doi: 10.11743/ogg20140618

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Discovery of large kink-band structures and petroleum exploration implications in Bachu area, Tarim Basin

Wang Yi1, Zhang Zhongpei1, Zhang Bo2, Yun Jinbiao1, Liu Shilin1, Song Haiming1   

  1. 1. Petroleum Exploration & Production Research Institute, SINOPEC, Beijing 100083, China;
    2. School of Earth and Space Sciences, Peking University, Beijing 100871, China
  • Received:2014-10-09 Revised:2014-11-03 Online:2014-12-08 Published:2015-01-27

Abstract: Outcrop observation, reprocessed seismic reflection profiles and drilling data were integrated to describe the characteristics of structural deformation of Bachu uplift. The previously interpreted structural style was "one uplift between two fault zones". However, the previously interpreted fault zones with deep angle were not faults but a pair of conjugate kink-band structural zones. It is believed that the large kink-band structural zones and the fold structures in the area are the dominant styles of structural deformations in the abdomen of the cratonic basin under compression. The widely developed gypsum-salt bed and discontinuous bed boundary and regional along-bedding compressional deformation are the vital geological factors controlling the formation of the large kink-band structural zones. Marks like geometry, seismic reflection and stress were presented for identification of large underground kink-band structural zones based on their formation mechanism and differences with large fault zones. On the basis of research on history of Bachu uplift, we discussed the implications of the Paleozoic kink deformation to reservoir improving and traps forming, analyzed their exploration prospect and outlined the favorable zones for discovering large anticlinal reservoirs of kind fold type.

Key words: kink-band zone, structural pattern, trap, Bachu area, Tarim Basin

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