Lithologic Reservoirs ›› 2011, Vol. 23 ›› Issue (5): 38-42.doi: 10.3969/j.issn.1673-8926.2011.05.008

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Using fluid inclusion to redefine gas accumulation stages of Xujiahe Formation in Hexingchang area

FENG Jierui1，LENG Jigao2，ZHU Li1，ZHANG Yong1，SUN Haiwei3   

  1. 1. State Key Laboratory of Oil and gas Reservoir Geology and Exploitation， Chengdu University of Technology， Chengdu 610059， China； 2. Research Institute of Exploration and Development， Southwest Branch Company， Sinopec， Chengdu 610081， China； 3. No. 2 Oil Production Plant， Daqing Oilfield Company Ltd.， PetroChina， Daqing 163114， China
  • Online:2011-10-20 Published:2011-10-20

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Abstract:

Based on the analysis of 230 inclusion samples of the second and fourth members of Xujiahe Formation in Hexingchang area, the characteristics of hydrocarbon inclusion and hydrocarbon-bearing salt water inclusion combining with burial history are used to define the gas reservoir formation time. The process of hydrocarbon accumu-lation in the study area is as following：The two main peak homogenization temperatures of the fourth member of Xujiahe Formation ranges from 77 ℃ to 98 ℃ and from 118 ℃ to 120 ℃ respectively, and the corresponding hydrocarbon accumu-lation stages are middle-late stage of Middle Jurassic and middle stage of Late Jurassic, with the former as the main accumulation stage; The main peak homogenization temperatures of the second member of Xujiahe Formation ranges from 95 ℃ to 106.1 ℃, from 119.8 ℃ to 127.1 ℃ and from 134.5℃ to 140.1 ℃ respectively, and the corresponding hydrocarbon accumulation stages are from the late stage of Late Triassic to the early stage of Early Jurassic and late stage ofMiddle Jurassic.

Key words: shale, tight oil development, Bakken, Eagle Ford, Barnett, implication, the U. S.

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