Technology and Application of Well Logging Evaluation of Shale Oil and Gas Reservoirs
Received date: 2014-10-31
Revised date: 2015-02-04
Online published: 2015-05-10
Along with the pressure on energy security,the status of shale oil and gas in energy structure of our country is becoming more and more important.As a kind of unconventional hydrocarbon resource,shale oil and gas are characterized by self-generation and self-storage,complex mineral composition,micro-nanometer scale pores,usually ultra-low porosity and permeability,and adsorbed gas and free gas coexistence.The above features have obvious differences from the conventional hydrocarbon resources,so the existing well logging evaluation theories and methods for conventional reservoirs are not applicable.The article guided by the unconventional hydrocarbon geology,aimed at the requirements of exploration and engineering reform,quantitative logging evaluation method of Total Organic Carbon is built,which is applicable to different maturity of continental and marine shale.And quantitative well logging evaluation technology for complex mineral components is formed.Upon the conventional logging data,a new method of rock brittleness evaluation is put forward.And the method of logging classification for shale reservoir quality using multi-parameter weighting is established.Eventually the complementary technologies of logging evaluation for shale oil and gas reservoirs are formed.The above achievements have filled the domestic technological blank of logging evaluation of unconventional shale reservoirs and currently have been widely used in Qing 1 member in Gulong Sag of the Songliao Basin,and Longmaxi Formation and Qiongzhusi Formation in Weiyuan and Changning districts of the Sichuan Basin,which effectively guide the favorable fractured intervals selection of new exploration wells,new horizontal wells and old wells review in the related oilfields.
LI Xia,CHENG Xiang-zhi,ZHOU Can-can,LI Chao-liu,LIU Zhong-hua . Technology and Application of Well Logging Evaluation of Shale Oil and Gas Reservoirs[J]. Natural Gas Geoscience, 2015 , 26(5) : 904 -914 . DOI: 10.11764/j.issn.1672-1926.2015.05.0904
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