高陡构造地震勘探圈闭要素畸变分析

Analysis of trap factor distortions in seismic survey in areas with steep dip structures

1. 塔里木油田公司勘探开发研究院,库尔勒841000;2. 四川地调处物探研究中心,成都华阳61021

the Research Institute of Petroleum Exploration and Development, Tarim Oilfield Company, Ku’erle 841000

高陡构造勘探开发风险远大于平缓构造,其原因在于高陡构造地震圈闭要素及反射层产状与实际情况有较大差异,即高陡构造地震圈闭要素及反射层产状已发生畸变。在应用地震勘探基本原理的基础上,采用模型正反、演技术,分析畸变现象及其产生的原因及危害,然后提出校正方法。根椐多年来从事高陡构造勘探的实践经验,提出了高陡构造井位部署的4项基本原则,它可起着校正高陡构造地震圈闭要素畸变的作用。

The risks of exploration and development in areas with steep dip structures are significantly greater than that of gentle structures. The reason for this is that there are distortions in seismic trap factors of steep dip structures and occurrences of reflectors. Based on the principle of seismic survey, this paper discusses the causes and hazards of the distortions via forward and inverse model techniques and proposes a correction method. By long experience with survey in areas with steep dip structures, the author presents four criteria for deployment of wells at steep dip structures, which can counteract the effects of distortions in seismic trap factors.