基于岩性预测的CRP道集优化处理  

CRP gather optimization processing based on lithological prediction

作　　者：刘力辉[1,2] 杨晓[3] 丁燕 陆蓉 康昆[3] 

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),四川成都610059 [2]成都晶石石油科技有限公司,四川成都610041 [3]中国石油天然气集团公司川庆钻探工程有限公司地球物理勘探公司,四川成都610213

出　　处：《石油物探》2013年第5期482-488,442,共7页Geophysical Prospecting For Petroleum

摘　　要：基于岩性预测的CRP道集优化处理主要针对道集保真度(动力学信息)进行补偿处理,尽可能挖掘宽角度信息,使资料的AVO特征符合抛物线规律,更好地适应Zoeppritz方程的应用条件,为通过叠前反演提取稳定的纵、横波速度和密度打下基础。基于岩性预测的CRP道集优化处理的主要内容涉及影响道集保真度、宽角度、信噪比和分辨率等4个方面的补偿性处理。它的质量控制手段是单点井控和平面相控。在保真度方面与炮检距相关的吸收补偿是重点,在宽角度方面大角度道集剩余时差补偿是重点,其中谱平衡吸收补偿技术和无速度剩余时差校正技术是两个现实可行的关键技术。The optimization processing on CRP gathers based on the lithological prediction is aimed at compensation processing for gather fidelity(dynamic information),as much as possible excavating the wide-angle information to make the AVO characteristics coinciding with the parabola law,better adapt to the conditions of Zoeppritz equation and lay the groundwork for the extraction of stable vP,vS and density by prestack inversion.The CRP gather optimization processing based on lithology prediction mainly involves in compensation processing of gather fidelity,wide angle,S/N and resolution. The quality control of the method is basically well control in point and sedimentary facies control in plane.Respectively,the key point of gather fidelity lies in absorption with offset and that of wide angle side is the residual moveout compensating for large-angle gathers.Spectrum-balance absorption compensation and non-velocity residual moveout correction are two feasible key techniques.

关 键 词：岩性预测 CRP道集 优化处理 振幅保真度 宽角度信息 

分 类 号：P631.4[天文地球—地质矿产勘探]