海洋可控源电磁勘探技术

Offshore Controlled-Source Electromagnetic Methods

胡小群 李斌 黄涛 张异彪

HU Xiaoqun LI Bin HUANG Tao ZHANG Yibiao

中国石化集团上海海洋石油局第一海洋地质调查大队, 上海 201208

No.1 Marine Geological Investigation Party, Shanghai Offshore Petroleum Bureau, SINOPEC, Shanghai 201208, China

随着海洋油气勘探开发由浅水区走向深水区,海洋可控源电磁技术(CSEM)可以有效降低深水勘探的钻探风险,正逐步发挥越来越大的作用。由于烃的导电性很差,因此含油气岩层的电阻率远大于周围含水的围岩。通过CSEM勘探技术可以找出低阻背景中的高阻异常体。将CSEM勘探结果与地震资料综合解释,可以大大提高钻探的成功率。论述了CSEM的基本原理、施工方式及影响勘探效果的因素,并与地震勘探资料进行了比较,旨在为我国深水油气勘探开发在选择勘探技术方法上提供参考。

With offshore HC exploration and development changing from shallow water to deep water, offshore controlled source electromagnetic technology (CSEM) has been widely used in deep water exploration to reduce exploration risk. Because of the poor conductivity of hydrocarbon, the resistivity of HC bearing rocks is higher than the water-bearing rock. With CSEM exploration techniques, the abnormal body with high resistance can be identified from the low resistance background. The risk of drilling can be reduced greatly through interpretation of CSEM data and seismic data. In this article, the basic principles, the operation ways and the factors which might influence the exploration results are discussed, and the exploration results of CSEM have been compared with the results of seismic exploration. The aim of this article is to provide reference for the selection of deep water HC exploration and development methods.

https://doi.org/10.3969/j.issn.1008-2336.2012.03.013