Oil & Gas Geology ›› 2018, Vol. 39 ›› Issue (5): 878-888.doi: 10.11743/ogg20180503

Previous Articles     Next Articles

Characteristics of differential activities in major strike-slip fault zones and their control on hydrocarbon enrichment in Shunbei area and its surroundings,Tarim Basin

Deng Shang1,2, Li Huili1,2, Zhang Zhongpei1, Wu Xian2, Zhang Jibiao1   

  1. 1. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China;
    2. Northwest Oilfield Branch Company Ltd., SINOPEC, Urumqi, Xinjiang 830011, China
  • Received:2017-12-05 Revised:2018-05-03 Online:2018-10-28 Published:2018-09-06

Abstract: The faulting characters and evolution history of the Tuopu 39 fault system,and the Shunbei 1,Shunbei 5 fault zones,distributed in Shunbei area and its surroundings,Tarim Basin,were investigated in detail.Based on the analysis of fault evolution on mechanics and large amount of single-well production performance,we fully discussed the control of strike-slip faults on hydrocarbon enrichment.The integrated analyses reveal fundamental differences between the Tuopu 39 fault system and the Shunbei 1,Shunbei 5 fault zones in terms of geometries,kinematics,and structural evolution.The NNE-trending Tuopu 39 fault system experienced sinistral movement in conjugate strike-slipping state at the early stage,but turned to dextral strike-slipping at the late stage due to the change of the orientation of maximum principal stress.In comparison,the NNW-trending secondary faults inside the system were almost inactive.Shunbei 5 fault zone(NNW-NS-trending) formed ahead of the NE-trending Shunbei 1 fault zone and experienced different stress regimes and changes of the maximum principal stress orientation.The faulting movements of Tuopu 39 fault system in the late stage occur in Himalayan period,the same as hydrocarbon accumulation,thus control the hydrocarbon enrichment,particularly in the pull-apart areas along the fault zone.The analysis on multiple production wells on Shunbei 1 fault zone suggests that the underlying strike-slip fault segments and the juxtaposed pull-apart intervals corresponding to the en echelon normal faults of relative bigger intensity are more enriched in hydrocarbons.

Key words: fault segmentation, en chelon normal fault, fault movement, hydrocarbon enrichment, strike-slip fault zone, Shunbei area, Tarim Basin

CLC Number: