Oil & Gas Geology ›› 2019, Vol. 40 ›› Issue (5): 972-989.doi: 10.11743/ogg20190503

• Petroleum Geology • Previous Articles     Next Articles

Hydrocarbon charging history of the ultra-deep reservoir in Shun 1 strike-slip fault zone,Tarim Basin

Wang Yuwei1, Chen Honghan1, Guo Huifang1, Zhu Zhihui1, Wang Qianru1, Yu Peng2, Qi Lixin3, Yun Lu3   

  1. 1. School of Earth Resources, China University of Geosciences(Wuhan), Wuhan, Hubei 430074, China;
    2. School of Petroleum and Chemical Engineering, Beibu Gulf University, Qinzhou, Guangxi 535000, China;
    3. Northwest Oil Company Ltd., SINOPEC, Urumqi, Xinjiang 830011, China
  • Received:2018-05-11 Revised:2019-06-18 Online:2019-10-28 Published:2019-08-17

Abstract: Major breakthrough in oil-gas exploration has been made in the ultra-deep strata of Shunbei area,Tarim Basin.Following the geochemistry comparison of crude oil and natural gas in the Ordovician Yijianfang Formation in Shunbei area,combined with the analysis of microscopic fluorescence spectrum parameters and fluorescence color,we put forward that the study area has undergone multi-stage hydrocarbon charging,the crude oil charged earlier has experienced biodegradation to a certain degree,while the gas is associated with the crude oil.In addition,through the comparison of crude oil in Shunbei and Shunnan areas in terms of isoprenoid parameters,biomarker compounds and light hydrocarbons in crude oils,we found that the hydrocarbon in Shunbei area is derived from the same source rocks as Shunnan area,that is,from the Cambrian Yurtusi Formation source rocks,and has migrated up to the Ordovician reservoirs along the faults cutting through the Cambrian.The samples collected in Shunbei area were analyzed systematically by fluid inclusion testing,as well as cold cathodoluminescence and fluorescent observations.The results show that there are three stages of oil charging in the late Caledonian,late Hercynian,and late Himalayan respectively,and one-stage gas charging in the late Himalayan.

Key words: fluid inclusion, hydrocarbon charging history, strike-slip fault zone, ultra-deep reservoir, Shunbei area, Tarim Basin

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