塔里木盆地巴楚隆起玛北1井基于垂直地震剖面的地震层位综合标定

在勘探开发过程中,地震资料层位标定是地震解释阶段的第一步和预测储层研究的前提,也是高精度勘探工作的基础工作。以塔里木盆地巴楚隆起玛北1井为例,简要分析了常规合成记录标定和VSP标定存在的问题,建立了该区域垂直地震剖面(vertical seismic profiling, VSP)资料的处理流程,之后利用玛北1井校正的声波曲线合成记录和VSP走廊叠加剖面来进行综合层位标定,将深度域测井、地质层位资料与时间域地震资料紧密连接起来。最后通过层位标定结果、层速度的分层以及泊松比的特征,推测在深度4 800～4 925 m为有利储层段,并在钻井结果中得到了印证。

Seismic horizon calibration based on VSP data for Mabei-1 in Bachu uplift, Tarim Basin

In the process of exploration and exploitation, seismic horizon calibration is the first stage of interpretation and the premise of reservoir prediction, as well as the basic work of high-precision exploration. With the example of Mabei-1 in Bachu uplift of Tarim Basin to analyze briefly the issues in the calibration of conventional synthetic records and vertical seismic profiling (VSP). Furthermore, the flow of VSP data handling was established for this area. The acoustic curve synthesis record corrected by Mabei-1 and the profile of VSP corridor stack were used to conduct comprehensive horizon calibration. And it correlated the depth domain logging, geological horizon data and time domain seismic data. Finally, based on the results of horizon calibration, layer velocity stratification, and the Characteristics of Poisson''s ratio, the depth of 4800m-4925m is estimated as favorable interval, which also is confirmed by the drilling results.