叠前深度偏移技术在潜山油藏勘探中的应用

Application of Prestack depth migration in buried hill reservoir exploration

1. 胜利油田物探研究院,山东东营257100;2. 石油大学,山东东营257062

1. Geophysicsal Research Institute of Shengli Oilfield, Dongying 257100, China;2. University of Petroleum, Dongying 257062, China

简要介绍了叠前深度偏移方法的基本原理和主要流程; 主要研究叠前深度偏移资料的解释应用方法, 以实际资料为研究对象, 分析这种方法应用效果及存在的不足。将潜山分为单面山、残丘山、逆冲构造的复杂断块山和被不规则速度异常体覆盖的潜山4种类型, 以分析叠前深度偏移资料的品质特征为基础, 研究叠前深度偏移技术的应用范围及目前所用叠前深度偏移软件存在的问题, 使之更好地应用于生产实践。

This paper briefly introduced the basic theory and main steps of prestack depth migration (PSDM), illustrated the interpretation methods and application of the data after PSDM,and pointed out that PSDM may be the best method for exploration of buried hill reservoirs. Buried hills were divided into four classes, single slope hill, remnant hill, thrust block hill, and hill covered by objects with irregular velocity abnormal. We investigated the application conditions of PSDM and limitations of PSDM software that are currently used in practice. The results are helpful for guiding practice.