Abstract：The resources of deep shale gas are abundant in the Longmaxi Formation of the southern Sichuan Basin with complicated geological and engineering conditions.It is important to fully utilize geophysical technologies in high-efficient exploration and development of shale gas. In complex mountainous areas，the acquisition efficiency of seismic data is low，and their quality and resolution remain to be increased.In addition，accurately predicting a “sweet spot” or a microfracture is challenging，and it is difficult to accurately monitor fracturing stimulation.To address these problems，this paper systematically summarizes geophysical prospecting techniques for deep shale gas which are suitable for the southern Sichuan Basin and puts forward future research direction.The research results indicate the followings：①Node instruments and intelligent seismic systems can effectively enhance the acquisition efficiency of seismic data，and the dynamic tracking of the well depth and mudstone and the combined excitation of explosive and vibroseis can improve the quality of the original single shot and seismic data.②Well-driven high resolution processing and true-surface tilted transverse isotropy (TTI) anisotropic pre-stack depth migration increase the imaging accuracy of seismic data.③Geostatistical inversion，intelligent fracture prediction developed by GeoEast，and in-situ stress prediction with seismic data improve the prediction accuracy of thin re-servoirs，fractures，and in-situ stress，respectively.④The application that a crawler drives a geophone realizes the microseismic monitoring along the whole horizontal section，and the electromagnetic excitation method can provide a new technical means for fracturing monitoring and effect evaluation.Distributed acoustic sensing (DAS)-based optical fiber sensing technology enables more accurate monitoring of reservoir stimulation.⑤The geophysical prospecting techniques for deep shale gas have made initial progress.On this basis，more efforts should be made to conduct technique research on DAS-combined three-dimensional exploration，high-fidelity migration imaging，and DAS-based integrated services in the full life cycle, so as to form a series of supporting geophysical prospecting techniques for deep shale gas in complex mountainous areas of southern China.
张少华, 邓小江, 冯许魁, 巫芙蓉, 杨晓, 管敏. 川南地区深层页岩气地球物理勘探技术新进展与攻关方向[J]. 石油地球物理勘探, 2023, 58(1): 238-248.
ZHANG Shaohua, DENG Xiaojiang, FENG Xukui, WU Furong, YANG Xiao, GUAN Min. New progress and research direction of geophysical prospecting techniques for deep shale gas in southern Sichuan Basin. Oil Geophysical Prospecting, 2023, 58(1): 238-248.
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