利用纵波资料反演裂缝发育密度和方向

使用地震纵波资料、利用振幅随入射方位角变化可定量预测裂缝的发育方向、定性预测裂缝发育密度 ,该方法具有简便、稳定、可操作性强、资料前期处理方法成熟等特点。该文在该方法的基础上提出采用广义线性反演来克服由于地震振幅的补偿和入射方位角计算不准确带来的计算误差 ,并提出了相邻面元组合、同偏移距真振幅校正等一系列实用算法和处理流程。经某地区三维地震资料的实际处理证明 :该方法具有较强的抗干扰能力 ,对覆盖次数较低的地震资料也能获得较好的效果 ,反演结果稳定可靠

INVERSION OF FRACTURE DENSITY AND AZIMUTH USING P-WAVE SEISMIC DATA

Utilizing seismic amplitude versus incidence azimuth, one can predict the fracture azimuth quantitatively and determine the fracture density qualitatively from P wave seismic data. The method is simple, stable and operable. Based on this method, the authors use the generalized linear inversion (GLI) to overcome the calculation errors coming from the seismic amplitude compensation and azimuth calculation. To make this method more applied, the authors put forward ASEC (adjacent surface combination), CORAR (common offset real amplitude revision), other methods and the applied process flow. Real 3 D seismic data calculating results show that this method and flow have a rather strong anti jamming ability. The result of inversion is stable and trusty.