Abstract:The existing pre-stack wide-azimuth fracture prediction method is data-based, and the geological model cannot affect the prediction process. The Archaean buried-hill fractured reservoirs in the M gas field of Bohai Bay Basin (China) are mainly controlled by inside high-angle faults. To this end, based on the wide-azimuth seismic data of the M gas field, this paper proposes a high-angle-fault constrained azimuthal Fourier coefficient fracture prediction method with pre-stack inversion. Firstly, the f-k filtering and the Radon transformation with a high resolution are used to extract the high-angle fault information from post-stack seismic data, which is then converted as prior weights of the azimuthal Fourier coefficient inversion method, so as to develop the function of high-angle-fault constrained fracture prediction inversion targets and calculate the fracture density and azimuth estimation. The proposed method is applied in the M gas field, and the application effect shows that fracture prediction results are of geological significance and are in good agreement with fracture features interpreted from the electrical imaging well logging and the production and test data of each well. Therefore, the method can be applied to design and optimize the location of production wells.
范廷恩, 杜昕, 马淑芳, 范洪军, 贺新蔚, 樊鹏军. 高角度断裂约束的方位傅里叶系数裂缝预测方法及在M气田的应用[J]. 石油地球物理勘探, 2022, 57(6): 1436-1444.
FAN Ting'en, DU Xin, MA Shufang, FAN Hongjun, HE Xinwei, FAN Pengjun. Application of high-angle-fault constrained azimuthal Fourier coefficient fracture prediction in M gas field. Oil Geophysical Prospecting, 2022, 57(6): 1436-1444.
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