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Adaptability analysis and optimization of log suite for uncased wellbores of shale gas reservoirs:A case study of Sichuan Basin,China

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Energy Geoscience 2023年第2期4卷 72-81页

作者： Benke Shen Ning Xia Jun Li Jing Lu Song Hu Xiang Ge Zhiyuan Liu Kun Liu Qiangfu Kong Key Laboratory of Shale Oil/Gas Exploration and Production Technology SINOPECBeijing102206China Petroleum Exploration and Production Research Institute SINOPECBeijing100083China China Petroleum&Chemical Corporation Beijing100728China Xi'nan MWD/LWD&logging Branch Sinopec Matrix Co.Ltd.Chengdu610041China

Significant progress has been made in the exploration and development of unconventional gas resources in China since the beginning of the 21st *** a rapid increase in yield,the exploration and development of shale gas have been upgraded to a level of national *** is one of the core technologies in gas exploration and ***,logging technologies face the challenges of complex geological conditions and well casing environment,high temperature,high pressure,and strong *** the rich experience accumulated,unified understanding and implementation specifications are yet to be established for shale gas well *** the analysis and comparison of the effectiveness and adaptability of logging technologies at different stages of shale gas exploration and development for the Sichuan Basin,this study optimizes the log suite to meet the demand for highefficiency exploration and development of shale *** to the adaptability analysis of shale gas log suite,the mandatory logging items of exploratory wells should include caliper log(CAL),natural gamma ray spectrometry(NGS)log,spontaneous potential(SP)log,directional survey,borehole compensated sonic log,litho-density log(LDL),compensated neutron log(CNL),dual laterologmicrospherically focused log/dual induction-laterolog log/array induction log,temperature log,elemental capture spectroscopy(ECS)log,formation microimager(FMI)log,and array sonic *** log suite of appraisal wells is almost the same as that for exploratory wells,excluding the ECS log and microresistivity scanning ***,for the logging of horizontal/highly-deviated holes,the log suite of vertical wells should be referred to according to specific well conditions.

关键词： log suite logging item Shale gas Exploratory well Appraisal well Adaptability Optimization

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