Fracture prediction based on attenuative anisotropy theory and its application to a shale gas reservoir

Abstract Shale gas reservoirs require artificial hydraulic fracturing to achieve commercial production. Continental Jurassic shale have several thin interlayers (e.g. sandstone and carbonate), which lead pseudo-anisotropy of the seismic amplitude velocity, traditional technology for predicting anisotropic fractures has difficulty in identifying a true target. Based on theory azimuthal anisotropy equivalent medium theory, this paper, approximate formula reflection coefficient attenuating equation elastic impedance are derived. With objective function established using Bayesian group sparse inversion methods, parameters such as fluid terms fracture characteristics obtained by solving matrix, highly accurate prediction 3D density is obtained. The validity method confirmed via test single well application actual data reservoir.