井震联合分析技术在复杂河流相储层刻画中的应用

Application of combined well-seismic analysis technology in complex fluvial reservoir characterization

郄莹,王建立,马佳国,白清云,李文滨

QIE Ying, WANG Jianli, MA Jiaguo, BAI Qingyun, LI Wenbin

中海石油（中国）有限公司天津分公司，天津 300452

Tianjin Branch of CNOOC Ltd., Tianjin 300452, China

复杂河流相油田进入开发后期的高含水阶段后，储层层间、层内非均质性严重制约着油藏剩余油挖掘。为了解决该问题，文中利用高分辨率采集三维地震资料，结合地质认识、钻井、油藏生产动态等信息的分析，并基于地层倾角振幅对比属性，提高对曲流河河道的识别效果；同时参照现代曲流河沉积模式对沉积微相进行刻画，精细识别出复杂河流相纵向沉积期次。在此基础上，重点对曲流河废弃河道、点坝进行了描述和预测，再用已钻定向（水平）井和油藏生产动态综合标定结果，预测出点坝侧积夹层发育情况，实现了对复杂河流相储层精细表征。

In the high water cut period of late stage of complex fluvial oil field development, the reservoir interlayer and intra-layer heterogeneity seriously affects the remaining oil potential tapping. In order to solve this problem, using the high-resolution three-dimensional seismic data, and combining with geological knowledge, drilling, reservoir production performance, the recognition of meandering river channel is improved based on the contrast properties of the inclination amplitude. Then the sedimentary microfacies is characterized according to the modern meandering river sedimentary model, and the longitudinal deposition periods of the complex fluvial are recognized. On this basis, the paper focuses on the description and prediction of abandoned channel and point bar of the meandering river. Then, the development of the lateral accretion interlayer of the point bar is predicted by using calibration results of the drilled directional (horizontal) well and the reservoir production performance, and the fine characterization of complex fluvial facies reservoir is realized.

10.6056/dkyqt202105012