声反射成像测井数据处理研究进展
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摘要
围绕国内外声反射成像测井的发展历史及近年研究成果论述波场分离、偏移叠加等方面在其数据处理中的研究进展。国外从最初的F-K滤波发展到现在的多种方法,主要是以线性预测理论为基础的分离方法。国内最新技术是以小波变换和STC方法结合的多尺度相关法。偏移成像方法主要集中在叠前偏移方面,广义Radon变换法、Kirchhoff偏移、F-K偏移、等效偏移距偏移均投入应用。地震数据处理的逆时偏移技术的引入是声反射测井成像技术的重要方向。偶极横波反射波有更高的探测深度和信噪比,具有一定的方位识别能力,不仅可以得到反射界面倾角,还可以判断界面走向。该方法的研究可以拓展多极子声波测井仪器的应用范围。利用相控阵技术进行声场定向辐射和接收的三维声反射测量方法的研究对未来三维数据处理提出了新的要求。
Acoustic reflection imaging logging is in the last decade has been broadly used to identify the interface of formation,structures and cracks near the borehole.The quality of the data processing is one of the key points for its successful application in the field.In this paper,we study the history and recent improvement of acoustic reflection imaging at home and abroad,and discuss the progress of the data processing methods in the separation,migration and stacking of wave field.Currently,the foreign researchers put their efforts mainly on the linear prediction theory developed in recent years,except this method,our domestic researchers employ the multi-scale correlation method which is based on wavelet transform and STC(Slowness Time Correlation) technology.The migration methods are mainly concentrated in the prestack migration,including the generalized Radon transform,Kirchhoff migration,F-K migration,equivalent offset migration.The introduction of reverse-time migration in seismic data processing is an important direction of imaging technology.In addition,it is a hot topic to employ the method of reflected shear wave extraction and imaging.The dipole S-wave reflection imaging has much better investigation depths and SNR with better azimuth recognition,which not only provides dips of the reflection interfaces and judges the interface trend,but also expands the use of multi-pole sonic logging tools.The phase control array technique is used to study the 3D sonic reflection survey radiated and received from directional sonic fields.And in this survey we need new and outstanding 3D log data processing methods.
引文
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