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Method of seismic surveying for resolving the effects of formation anisotropy in shear wave reflection seismic data
Method of seismic surveying for resolving the effects of formation anisotropy in shear wave reflection seismic data
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机译：解决剪切波反射地震数据中地层各向异性影响的地震勘探方法
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摘要
A novel method of seismic exploration has been developed to resolve confusing and distorted shear wave reflection seismic data which can be obtained in areas having anisotropic formations. In particular, the present method of shear wave seismic exploration comprises imparting first shear wave seismic energy into the earth at selected points with a first source having a first polarization with respect to the line of survey, and recording first signals representative of the earth's response with first geophones having a first polarization with respect to the line of survey. Also, second shear wave energy is imparted into the earth at selected points along the line of survey, with a second shear wave source having a second polarization with respect to the line of survey, and recording second signals representative of the earth's response with second geophones having a second polarization with respect to the line of survey. With a measure of the angle between the survey line and a principal axis of an underlying azimuthally anisotropic formation, the first and second signals are inverted to obtain principal component signals in whcih the confusing and distorted shear wave reflection seismic data resulting from anisotropic formations can be ameliorated.
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