Study of prestack elastic parameter consistency inversion methods  

叠前弹性参数一致性反演方法研究(英文)

作　　者：黄捍东[1,2] 张如伟[3] 慎国强[4] 郭飞[1] 汪佳蓓[1] 

机构地区：[1]油气资源与探测国家重点实验室(中国石油大学(北京)),北京102249 [2]中国石油大学(北京)提高采收率研究中心,北京102249 [3]广州海洋地质调查局,广州510760 [4]胜利油田物探研究院,东营257022

出　　处：《Applied Geophysics》2011年第4期311-318,371,共9页应用地球物理（英文版）

基　　金：sponsored by the National Major Program (No. 2011ZX05006-006);the 973 Program of China (No. 2011CB201104);Technical Research of Elastic Flooding Boundary and Well Network Optimization at the Development Late Stage of Low Permeable Oil Field (No. 2011ZX05009)

摘　　要：The three parameters of P-wave velocity, S-wave velocity, and density have remarkable differences in conventional prestack inversion accuracy, so study of the consistency inversion of the ＂three parameters＂ is very important. In this paper, we present a new inversion algorithm and approach based on the in-depth analysis of the causes in their accuracy differences. With this new method, the inversion accuracy of the three parameters is improved synchronously by reasonable approximations and mutual constraint among the parameters. Theoretical model calculations and actual data applications with this method indicate that the three elastic parameters all have high inversion accuracy and maintain consistency, which also coincides with the theoretical model and actual data. This method has good application prospects.常规叠前反演中,纵波速度、横波速度和密度三参数之间,在反演精度上存在明显的差异,"三参数"的一致性反演遂成为重要的研究目标。本文从导致它们精度差异的根源入手,提出了新的叠前反演算法和思路,通过合理的近似,构成参数间的互动和相互约束,使三个参数的反演精度得以同步提高。理论模型试算和实际资料应用表明,三个弹性参数均有较高的反演精度且保持了一致性,与理论模型和实际资料吻合。该方法具有较好的应用前景。

关 键 词：Prestack seismic inversion elastic parameter consistency inversion prior constraint 

分 类 号：P631.4[天文地球—地质矿产勘探]