基于广义S变换Q值属性的各向异性裂缝检测  

Anisotropic Crack Detection Based on Generalized S-transform Q-value attribute

作　　者：李雷豪 刘婷 魏俊杰 LI Leihao;YANG Yang;LIU Ting;WE Junjie(Survey Planning Research Center,Sichuan Academy of Geological Survey,Chengdu 610017;Sichuan Institute of Industry and Information Technology,Chengdu 610017;Sichuan Institute of Geological Surveying and Mapping Co.,Ltd.,Chengdu 610017)

机构地区：[1]四川省地质调查研究院调查规划研究中心,成都610017 [2]四川省工业和信息化研究院,成都610017

出　　处：《四川地质学报》2024年第4期744-749,共6页Acta Geologica Sichuan

摘　　要：地下介质存在裂缝使地震波传播具有各向异性的特征,故能利用叠前地震资料中含有的方位各向异性来检测裂缝型储层。目前大多数各向异性裂缝检测都是基于振幅属性上进行的,而Q值作为反映地震波吸收衰减能力的一种岩石固有属性,在裂缝预测中发挥着重要作用。为此,提出一种基于广义S变换Q值提取方法的各向异性裂缝检测技术,并将该方法的裂缝检测结果与钻井实测结果对比,证明该方法的可行性。利用新方法对四川某地区致密砂岩裂缝型储层进行应用分析,与基于振幅属性的各向异性裂缝检测方法对比,结果表明基于广义S变换Q值的各向异性裂缝检测对裂缝信息更为敏感,与实际情况更为吻合。Seismic wave propagation is anisotropic due to the existence of fractures in underground media,so the azimuthal anisotropy contained in pre-stack seismic data can be used to detect fractured reservoirs.Most anisotropic fracture detection is based on the amplitude attribute,and Q value,as an inherent rock attribute reflecting the absorption and attenuation ability of seismic waves,plays an important role in fracture prediction.Therefore,an anisotropic fracture detection technology based on generalized S-transform Q value extraction method is propose,and the fracture detection results of this method are compared with the measured drilling results to prove the feasibility of this method.The new method is applied to a tight sandstone fractured reservoir in an area of Sichuan province,and compared with the anisotropic fracture detection method based on amplitude attribute.The results show that the anisotropic crack detection based on generalized S-transform Q value is more sensitive to crack information and more consistent with the actual situation.

关 键 词：广义S变换 Q值 各向异性 裂缝检测 

分 类 号：P631.49[天文地球—地质矿产勘探]