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  

Application of high-angle-fault constrained azimuthal Fourier coefficient fracture prediction in M gas field

作　　者：范廷恩 杜昕 马淑芳 范洪军 贺新蔚 樊鹏军 FAN Ting'en;DU Xin;MA Shufang;FAN Hongjun;HE Xinwei;FAN Pengjun(CNOOC Research Institute Ltd.,Beijing 100020,China;CGG Technical Services(Beijing)Co.,Ltd.,Beijing 100020,China)

机构地区：[1]中海油研究总院有限责任公司,北京100020 [2]赛吉纪技术服务(北京)有限公司,北京100020

出　　处：《石油地球物理勘探》2022年第6期1436-1444,I0007,I0008,共11页Oil Geophysical Prospecting

摘　　要：现有叠前宽方位裂缝预测方法基于数据驱动,地质模式认识无法干预预测过程;渤海湾盆地M气田太古界潜山裂缝性储层主要受内幕带高角度断裂控制。为此,基于M气田宽方位地震资料,提出基于高角度断裂约束的方位傅里叶系数叠前反演裂缝预测方法。首先,利用f-k滤波与高分辨率Radon变换从叠后地震资料中提取高角度断裂信息,进一步映射为方位傅里叶系数反演方法中的先验权重,以此建立高角度断裂约束的裂缝预测反演目标泛函,最终求解得到裂缝密度与方位角信息。所提方法在M气田的应用效果表明,裂缝预测结果更具地质意义,与井上解释的裂缝特征以及各井生产测试情况吻合较好,可用于开发井井位设计与优化。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 highangle 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.

关 键 词：方位各向异性 裂缝预测 方位傅里叶系数 F-K滤波 RADON变换 高角度断裂约束 

分 类 号：P631[天文地球—地质矿产勘探]