Primary wave azimuthal anisotropy based fracture predicting method
An azimuthal anisotropy and anisotropy technology, applied in the field of petroleum exploration, can solve the problems of not considering the influence of anisotropy, low accuracy of ellipse fitting results, not considering offset and azimuth information, etc. Fracture ellipse fitting accuracy, real and reliable seismic attributes, and basically uniform coverage times
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[0045] The crack prediction method proposed by the present invention will be described in detail below in conjunction with the drawings and embodiments. Since the crack prediction method proposed by the present invention is an improvement made on the basis of the traditional crack prediction method, the following first introduces the working principle of the traditional crack prediction method, and then uses high-precision wide-azimuth seismic data from a certain work area in the northern Jiangsu Basin. For the implementation object, the implementation process of the crack prediction method of the present invention is introduced in detail.
[0046] When seismic longitudinal waves propagate in underground fractured media, seismic attributes such as velocity and amplitude will change with azimuth. In the HTI medium, the characteristics of the reflected wave change with the azimuth angle and the incident angle. The reflection coefficient formula of HTI medium proposed by Ruger et a...
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