识别火成岩岩性的综合物探技术  

Integrated geophysical techniques for identification of igneous rocks.

作　　者：刘云祥[1] 何展翔[2] 张碧涛[2] 董卫斌[2] 李德春[2] 

机构地区：[1]中国地质大学,北京100083 [2]中国石油集团东方地球物理勘探有限责任公司,河北涿州072751

出　　处：《勘探地球物理进展》2006年第2期115-118,共4页Progress in Exploration Geophysics

摘　　要：自从发现火成岩油气藏以来,在油田勘探中火成岩岩性岩相的勘探研究备受关注。以SN地区为例,介绍了重磁电震综合勘探火成岩岩性岩相识别技术。地震方法能够发现火成岩,并高精度确定火成岩深度,甚至圈定火成岩范围,但难以确定火成岩岩性岩相。重磁电资料能够识别具有密度、磁性和电阻率等特征差异的火成岩岩性岩相,对火成岩体平面位置的确定具有一定精度,但对深度确定精度不高。在高精度资料的基础上,采用地震与重磁电联合处理解释技术,能有效地提高重磁电方法的勘探精度,使重磁电异常更直接反映深部火成岩。 SN地区火成岩岩性岩相的勘探实例说明,重磁电震综合勘探技术识别火成岩岩性与实际情况吻合率较高,预测结果得到了钻探证实。Since the discovery of reservoir developed in igneous rocks, the research of igneous rocks in terms of lithology and facies have been becoming the focus for oilfield exploratioa In this paper we introduce the identification of lithology and facies of igneous rock with integrated geophysical techniques (gravity, magnetic, electrical method and seismic survey) in SN are-a. With seismic data, igneous rocks and their extension can be determined, but their lithology and facies are hard to determine, so we adopted GMES techniques to solve this problem in the area, which include gravity-stripping with gravity data and constraint-inversion with TEM data on the basis of known seismic data. High precision data has been achieved in terms of igneous rocks depth, lithology as well as their facies, which has been verified with later drilling data.

关 键 词：重磁电震 综合勘探 火成岩 岩性识别 油气勘探 

分 类 号：P631[天文地球—地质矿产勘探]