Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (6): 1620-1630.doi: 10.13278/j.cnki.jjuese.201506106

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Evaluation Method of Terrestrial Low-Mature Gas Source Rocks by Fuzzy AHP

Xiong Deming1,2, Zhang Mingfeng1, Wu Chenjun1,2, Tuo Jincai1   

  1. 1. Gansu Provincial Key Laboratory of Petroleum Resources; Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences; Lanzhou 730000, China;
    2. College of Earth Science, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2015-01-05 Published:2015-11-26

Abstract:

Under certain geological conditions, low-mature gas can accumulate to a gas reservoir. In the past, the evaluation of terrestrial low-mature gas source rock was only focused on the study of the physical and chemical properties. Due to the limitation of the current exploration and analyzing techniques, it is difficult to objectively evaluate the potential of the low-mature gas source rocks and their relative merits as source rocks. After reviewing the current research status of terrestrial low-mature gas source rocks, we build a new evaluation index system through analyzing 10 influencing factors and the range of each parameter. Based on the above, we build a new evaluation model for the terrestrial low-mature gas source rock by fuzzy analytic hierarchy process(AHP). With this new evaluation model, we can avoid the paradox in the evaluation of the low-mature gas source rocks and the blindness of selecting parameters; also we can improve the evaluation efficiency. The evaluation results agree with the analysis in Urengoy gas field. Based on the evaluation, the source rocks of Achimov, Bazhenov, Vasyugan, and Pokur are low-mature; Neocomian's and Tyumen's are in between of low-mature and mature; while Tampey's is mature. The method is provedto be practical and reliable in application.

Key words: low-mature gases, fuzzy analytic hierarchy process, low-mature gas source rocks, influence factor of gas source rocks, evaluation model of gas source rocks, Urengoy gas field

CLC Number: 

  • P618.13

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