Logging Evaluation Method and Its Application for Measuring the Total Organic Carbon Content in Shale Gas
详细信息
- 责任者：Li Yanjun (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ; Southwest Petroleum University ; Chengdu 610500 ; China) ; Zhang Liehui
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(1)
- 关键词：页岩气 ; shale gas ; 测井曲线 ; logging curves
- 页码：p.169-175
- 图表：illus., 1 table, 23 refs.
- 分类号：1600
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
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 ΔLgR and U curve was more applicable for continental facies shale,while good results have been achieved by both methods for marine facies shale.