Maoming Oil Shale, hydrocarbon-generation kinetics, source rock of coal measures, geological model,Qiongdongnan Basin,"/> Geological conditions for shale oil forming of Middle Jurassic Dameigou Formation in the northern margin of Qaidam Basin

Lithologic Reservoirs ›› 2014, Vol. 26 ›› Issue (6): 20-27.doi: 10.3969/j.issn.1673-8926.2014.06.004

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Geological conditions for shale oil forming of Middle Jurassic Dameigou Formation in the northern margin of Qaidam Basin

FU Xiaodong1， RAO Dan2， QIN Jianzhong2， SHEN Baojian2， XU Jin2， YANG Zhenheng2
  

  1.  1. PetroChina Hangzhou Research Institute of Geology ， Hangzhou 310023 ， China ； 2. Wuxi Research Institute of Petroleum Geology ， Sinopec ， Wuxi 214151 ， Jiangsu ， China
  • Online:2014-11-20 Published:2014-11-20

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Abstract: Based on field geologic section investigation, core observation, geologic test and drilling data, this paper analyzed the development characteristics, organic geochemical behavior, rock mineral features, reservoir properties and oil bearing capability of shale of the seventh member of Dameigou Formation in the northern margin of Qaidam Basin. The result shows that the shale with rich organic matter of J2d7 is thick vertically and continuous laterally, with high organic abundance and good organic type to generate oil. The lithologic assemblage types of J2d7  shale are various, the percentage of brittle minerals is high, and it developed many kinds of pores and has high content of occluded oil. Comprehensive study demonstrates that shale of Jhas basic geological conditions to form shale oil, and it is the best favorable target for shale oil exploration. Yuka fault depression, Hongshan fault depression, Ounan sag and Delingha fault depression may be the favorable areas for shale oil exploration.

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