叠前弹性参数一致性反演方法研究(英文)

• 作 者: 黄捍东 张如伟 慎国强 郭飞 汪佳蓓
• 机 构: 油气资源与探测国家重点实验室(中国石油大学(北京)),中国石油大学(北京)提高采收率研究中心,广州海洋地质调查局,胜利油田物探研究院,
• 出 处: Applied Geophysics
• 发表日期: 2004年期
• 关键词: 叠前 叠前地震反演 弹性参数 一致性 反演精度 一致性反演 地震反演 先验约束 叠前反演 理论模型

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。

In the conventional prestack inversion, there are obvious differences in the inversion accuracy between the three parameters of P-wave velocity, S-wave velocity and density, and the consistent inversion of the “three parameters” has become an important research goal. In this paper, we start with the root cause of their differences in accuracy, and propose a new prestack inversion algorithm and ideas. By reasonable approximation, the interaction and mutual restraint between the parameters constitute a synchronous improvement of the accuracy of the three parameters. The trial calculation of the theoretical model and the application of the actual data show that the three elastic parameters have higher inversion accuracy and consistency, which is in good agreement with the theoretical model and the actual data. The method has good application prospects.