逆时偏移技术在河间潜山内幕成像中的应用

发布时间：2018-06-08 20:07

本文选题：逆时偏移 + 高阶有限差分　；参考：《中国石油勘探》2017年02期

【摘要】：随着油气田勘探开发进入以深层隐蔽型油气藏为主的阶段,古潜山油气藏成为勘探开发的主要目标之一。河间潜山内幕地层埋藏较深,内幕构造复杂,地震资料信噪比低,给潜山内幕精确成像和构造展布特征的落实带来了极大困难。介绍了基于双程波动方程的逆时偏移的基本原理,主要包括高阶有限差分波场外推算法和完全匹配层吸收边界条件两个方面。在分析河间潜山内幕特征的基础上,使用逆时偏移和传统叠前深度偏移对模型数据和实际资料进行了处理,结果表明逆时偏移能够对河间潜山内幕进行准确成像,其成像效果好于传统方法。
[Abstract]:With the exploration and development of oil and gas fields entering the stage of deep concealed oil and gas reservoirs, the ancient Qianshan oil and gas reservoirs have become one of the main targets for exploration and development. The inner layer of the Qianshan river is deep buried, the inner curtain structure is complex and the signal to noise ratio of seismic data is low, which has brought great difficulties to the implementation of the accurate imaging and distribution features of the inner curtain in Qianshan. The basic principle of the inverse time migration based on the two way wave equation is introduced, including two aspects of the high order finite difference wave field extrapolation method and the fully matched layer absorption boundary condition. On the basis of the analysis of the interior feature of the river Qianshan, the inverse time migration and the traditional prestack depth migration are used to deal with the model data and the actual data. The results show that reverse time migration can accurately image the interior of Hejian Qianshan, and its imaging effect is better than traditional methods.
【作者单位】：中国石油华北油田公司地球物理勘探研究院;中国石油辽河油田公司勘探开发研究院;
【基金】：中国石油天然气股份有限公司重大科技专项“华北油田上产稳产800万吨关键技术研究与应用”(2014E-35)
【分类号】：P631.4;P618.13

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