Volume 23 Issue 6
Dec.  2017
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BAI Minggang, ZHANG Cong, YANG Yuru, et al., 2017. THE CHARACTERISTICS OF SHALE RESERVOIR FROM QIONGZHUSI FORMATION IN LOWER CAMBRIAN IN QUJING AREA, EASTERN YUNNAN PROVINCE, CHINA:A CASE STUDY OF WELL QUYE NO.1. Journal of Geomechanics, 23 (6): 838-845.
Citation: BAI Minggang, ZHANG Cong, YANG Yuru, et al., 2017. THE CHARACTERISTICS OF SHALE RESERVOIR FROM QIONGZHUSI FORMATION IN LOWER CAMBRIAN IN QUJING AREA, EASTERN YUNNAN PROVINCE, CHINA:A CASE STUDY OF WELL QUYE NO.1. Journal of Geomechanics, 23 (6): 838-845.

THE CHARACTERISTICS OF SHALE RESERVOIR FROM QIONGZHUSI FORMATION IN LOWER CAMBRIAN IN QUJING AREA, EASTERN YUNNAN PROVINCE, CHINA:A CASE STUDY OF WELL QUYE NO.1

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  • Received: 2017-01-18
  • Published: 2017-12-01
  • Shale from Qiongzhusi formation in Lower Cambrian is one of the most important focuses in shale gas exploration and development in South China; however, the black shale reservoir from Qiongzhusi formation in Lower Cambrian in eastern Yunnan province stays in a low level of study. Take Well Quye No.1 drilled in 2014 as an example, on the black shales from Qiongzhusi formation in Lower Cambrian, X-ray diffraction analysis of the whole rock and clay minerals are made; tests and SEM experiments like TOC, physical property and specific surface area are conducted; the characteristics and types of shale reservoir are analyzed comprehensively. The results show that shales are mainly composed of quartz (44.75%), clay minerals(25.47%)and feldspar (16.44%), consisting of three major pore types, which are intergranular pore, intragranular pore and organic-matter pore. It is worth mentioning that organic-matter pores are abundant and of great importance, in which mesopores are the main force with a certain potential of shale gas exploration and development. The volumes of pores decrease with the depth, and with increasing TOC, micropore volumes relatively increase. The porosity is mainly restricted by the organic-matter content and the development degree.

     

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