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Electrical structure identification of deep shale gas reservoir in complex structural area using wide field electromagnetic method

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Applied Geophysics 2024年第3期21卷 564-578,619,620页

作者： Gu Zhi-Wen Li Yue-Gang Yu Chang-Heng Zou Zhong-Ping Hu Ai-Guo Yin Xue-Bo Wang Qinag Ye Heng Tan Zhang-Kun Sichuan Natural Resources Investment Group Geophysical Exploration Institute Co. LtdSi Chuan Cheng Du 610072 PetroChina Southwest Oil and Gas field Company Si Chuan Cheng Du 610056 Petroleum Engineering Technology Research Institute of Sinopec North China Oil and Gas Company Zheng Zhou 450007

To fully exploit the technical advantages of the large-depth and high-precision artificial source electromagnetic method in the complex structure area of southern Sichuan and compensate for the shortcomings of the conventional electromagnetic method in exploration depth,precision,and accuracy,the large-depth and high-precision wide field electromagnetic method is applied to the complex structure test area of the Luochang syncline and Yuhe nose anticline in the southern *** advantages of the wide field electromagnetic method in detecting deep,low-resistivity thin layers are ***,on the basis of the analysis of physical property data,a geological–geoelectric model is established in the test area,and the wide field electromagnetic method is numerically simulated to analyze and evaluate the response characteristics of deep thin shale gas layers on wide field electromagnetic ***,a wide field electromagnetic test is conducted in the complex structure area of southern *** data processing and inversion imaging,apparent resistivity logging data are used for calibration to develop an apparent resistivity interpretation model suitable for the test *** the basis of the results,the characteristics of the electrical structure change in the shallow longitudinal formation of 6 km are implemented,and the transverse electrical distribution characteristics of the deep shale gas layer are *** the prediction area near the well,the subsequent data verification shows that the apparent resistivity obtained using the inversion of the wide field electromagnetic method is consistent with the trend of apparent resistivity revealed by logging,which proves that this method can effectively identify the weak response characteristics of deep shale gas formations in complex structural *** experiment,it is shown shows that the wide field electromagnetic method with a large depth and high precision can effectively characterize the electric

关键词： complex tectonic area in southern Sichuan wide field electromagnetic method deep exploration shale gas reservoir electrical structure

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Application of wide-field electromagnetic method in shale gas survey in Eastern Kunlun,Qinghai province,China

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Journal of Central South University 2020年第11期27卷 3388-3397页

作者： YU Zhong-hong YAN Ling-qin CAI Zhi-jie WANG Jin-hai XU Yong-feng LIN Jia-fu MA Long The Third Geological Exploration Institute of Qinghai Province Xi’ning 810000China Qinghai Geological Survey Xi’ning 810000China The Fourth Geological Exploration Institute of Qinghai Province Xi’ning 810000China Key Laboratory of Shale Gas Resources of Qinghai Province Xi’ning 810000China

In order to study the distribution of shale gas reservoir in the Babaoshan Basin of Eastern Kunlun,the wide-field electromagnetic(WFEM)survey was carried out to obtain the spatial distribution characteristics of the underground electrical volume resistivity based on the delineation of the scope of the Babaoshan Basin by regional gravity *** basic characteristics of the basement,basin framework,and extension,vertical change,burial depth of dark mud shale in this area were identified,and the electrical distribution of the Babaoshan mud shale horizon was revealed,which has been proved to be a good geological effect by *** exploration results show that the WFEM has significant effects on the exploration of shale gas occurrence strata,which meets the needs of investigation and evaluation of multi-layered and large-scale shale gas,and plays a good demonstration role in the follow-up shale gas exploration.

关键词： wide field electromagnetic method shale gas Eastern Kunlun Babaoshan Basin

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