Journal of Jilin University(Earth Science Edition) ›› 2016, Vol. 46 ›› Issue (2): 358-367.doi: 10.13278/j.cnki.jjuese.201602105

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Shale Gas Resource Potential Evaluation of Chang 9 Member, Fm. Yanchang in South Ordos Basin

Du Zhili1,2, Tian Ya2, Liu Hongjun3, Wang Fengqin3, Du Xiaodi2, Yuan Yuan2, Tong Lihua2   

  1. 1. College of Geosciences, China University of Petroleum, Beijing 102249, China;
    2. Oil & Gas Survey, China Geological Survey, Beijing 100029, China;
    3. College of Earth Sciences and Engineering, Xi'an Shiyou University, Xi'an 710065, China
  • Received:2015-08-09 Published:2016-03-26
  • Supported by:

    Support by the Project of National Oil and Gas Resources Survey and Strategic Selections,Ministry of Land and Resources (1211302108023)

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528

Abstract:

Besides Chang 7 Member, Chang 9 Member is the other important shale gas horizon however its resource potential is unknown. The shale layer with high gas content was found in Chang 9 Member of Well Huangtan-1, whose resource potential is preliminarily confirmed.Based on the drilling results of the well Huangtan-1, and combined with the data of adjacent wells, the development feature, organic matter abundance, organic type, thermal maturity, mineral and petrophysic characteristics, and gas content of shale, the shale gas potential of the study area is preliminarily analyzed. The deep and semi-deep lacustrine facies are deposited during Chang 9 Member deposition period. The total organic content (TOC) of Chang 9 Member is as high as 3.98%, with humic Ⅱ2 organic type, at the high-mature gas-prone stage. The mineral composition is mainly quartz and feldspar. The average gas content is 2.92 m3/t, which shows the great gas generation potential of Chang 9 Member in south Ordos basin.

Key words: shale gas, potential evaluation, Yanchang Formation, Chang 9 Member, south Ordos basin

CLC Number: 

  • P618.12

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