Lithologic Reservoirs ›› 2009, Vol. 21 ›› Issue (1): 61-65.doi: 10.3969/j.issn.1673-8926.2009.01.012

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Feixianguan Formation in western Sichuan

YE Zhaoyang 1，2，QIN Qirong1，LONG Shengxiang2，CHEN Chunfang2，LI Yongtao2   

  1. 1. Southwest Petroleum University， Chengdu 610500， China； 2. Research Institute of Petroleum Exploration and Development， Sinopec， Beijing 10083， China
  • Online:2009-03-16 Published:2009-03-16

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Abstract:

The marine carbonate reservoir of Triassic Feixianguan Formation in western Sichuan is mainly composed of sparry oolitic limestone, bioclastic limestone and sparry oolitic dolomite. It was formed by the later multi-stage diagenesis and tectonism, with dissolved pores, caves and fractures developed well. The lithologies, reservoir space,types and accumulation capability of the carbonate reservoir are analyzed by means of geologic survey and laboratory analysis. There are various types of reservoir space, and the pore structure is complex. The reservoir can be divided intofour types, and the oolite reservoir of the third member of Feixianguan Formation has the best quality. The reservoir quality and distribution are mainly controlled by sedimentary facies, denudation and tectonism. The quantitative evaluation and prediction for the distribution of the high-quality reservoir are carried out by using multi-factor analysis method. The result shows that the favorable zones distribute in the oolitie reservoir of the third member of Feixianguan Formation along anxiian Chaping, Nanmuyuan, Zhitonggong and Hanwang in western Sichuan.

Key words: fracture characteristics, migration and accumulation model, geological significance, Yanchang Formation, Jiyuan area

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