Logging Evaluation Method and Its Application for Measuring theTotal Organic Carbon Content in Shale Gas

LI Yan-jun, ZHANG Lie-hui, FENG Yuan-yuan, LIU Huan, LUO Di, LIU Jia-xia, JIA Xue-cheng

doi:10.11764/j.issn.1672-1926.2013.01.169

Natural Gas Geoscience >

2013 , Vol. 24 >Issue 1: 169 - 175

DOI: https://doi.org/10.11764/j.issn.1672-1926.2013.01.169

Logging Evaluation Method and Its Application for Measuring theTotal Organic Carbon Content in Shale Gas

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1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China; 2.College of Resources and Environment, Southwest Petroleum University, Chengdu 610500, China; 3.Southwest Oil and Gas Field, CNPC, Chengdu 610051, China

Received date: 2012-03-09

Revised date: 2012-07-11

Online published: 2013-02-10

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Abstract

Based on the definition of shale gas,the high abundance of organic matter is the material basis for hydrocarbon generation as well as the important carrier of adsorbed shale gas.This method estimated the organic carbon content of strata with the high-resolution vertical logging curves in shale strata and overcame the difficulty of evaluating shale gas which was caused by the shortage of core sample and the cost limitation of experimental analysis.Based on the logging response feature of the different logging curves and the logging information such as resistivity,acoustic slowness and natural gamma-ray spectrometry,this paper regressively calculated the organic carbon content with the methods of ΔLgR and natural gamma-ray spectrometer.Taking the calculation of shale organic carbon content of two wells in Sichuan Basin for example,the core data of TOC was subjected to error analysis and tested.The results showed that the congruent of ΔLg R and U curve was more applicable for continental facies shale,while good results have been achieved by both methods for marine facies shale.

Key words： Shale gas; Logging response characteristics; Organic carbon content; Natural gamma-ray spectrometry

Cite this article

LI Yan-jun, ZHANG Lie-hui, FENG Yuan-yuan, LIU Huan, LUO Di, LIU Jia-xia, JIA Xue-cheng . Logging Evaluation Method and Its Application for Measuring theTotal Organic Carbon Content in Shale Gas[J]. Natural Gas Geoscience, 2013 , 24(1) : 169 -175 . DOI: 10.11764/j.issn.1672-1926.2013.01.169

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