Lithologic Reservoirs ›› 2009, Vol. 21 ›› Issue (2): 45-48.doi: 10.3969/j.issn.1673-8926.2009.02.009

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Meteoric water karstification controlled by sequence unconformity of Cambrian-Lower Ordovician in Tazhong area

LI Yuxiang1，LI Guorong 1，2，GU Yanwu1，PAN Zhongliang1，JIANG Zhongzheng1,HU Wenyan1， TANG Hongwei1， LUO Peng1   

  1. 1. College of Energy Resources， Chengdu University of Technology， Chengdu 610059， China； 2. State Key Laboratory of Oil and Gas Reservoir and Exploitation， Chengdu University of Technology， Chengdu 610059， China
  • Online:2009-06-16 Published:2009-06-16

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Abstract:

The Cambrian-Lower Ordovician is mainly carbonate sediment in Tazhong area of Tarim Basin. Affected by sedimentary facies, the early meteoric water karstification under the control of the sequence unconformity boundary developed well. Based on the analysis of core, rock slice, carbon and oxygen stable isotope, strontium isotope and cathodoluminescence, the characteristics of petrology and mineralogy , geochemistry and karstification of the early meteoric water karstification are discussed. The early meteoric water karstification model under the control of the sequence unconformity boundary ofCambrian-Lower Ordovician in Tazhong area is established.

Key words: reservoir characteristics, pore structure, reservoir evaluation, Jinji Formation, central Guangdong

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