Anisotropic Crack Detection Based on Generalized S-transform Q-value attribute
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.
NETL
NSTL
万方数据
