羌塘坳陷石油地质走廊剖面重磁异常处理模拟及地质解释  

Gravity/Magnetic Modeling and Geological Explanation in Qiangtang Basin Geologic Aisle

作　　者：王喜臣[1] 贾建秀[1] 徐宝慈[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《吉林大学学报（地球科学版）》2008年第4期685-691,共7页Journal of Jilin University：Earth Science Edition

基　　金：国家油气专项(XQ-2004-06)

摘　　要：利用"重磁视深度滤波"方法对羌塘石油地质走廊南、北两条剖面上的实测重磁数据进行处理解释,提取两条剖面位场异常中含有的地质-地球物理断面的初始特征,然后使用最新的"重磁模拟解释系统(GM-SYS)",以初始特征为模拟初值,以地震、地电和地质资料为约束,进行重磁剖面模拟反演,获得了羌塘盆地南、北两条剖面精细的地质结构解释断面图和栅状图。结合剖面域内的其它资料对走廊域内几个重要地质问题进行了初步的分析和解释,对羌塘盆地石油地质走廊域内的地层、基底、断裂及火山岩分布有了进一步的认识,为整个羌塘盆地区域地质解释及油气远景评价提供了新的解释依据。The original gravity and magnetic data from two geologic profiles, south and north in Qiangtang petroleum geologic aisle, were processed by using the method, ＂gravity and magnetic apparent-depth filtering＂, and the initialization characteristics of geologic-geophysical profile were extracted from the potential field abnormality in these profiles. And then, the latest software, ＂Gravity/Magnetic Modeling Software （GM - SYS）＂ , was used to inverse gravity and magnetic profile, the geologic fine structure profile plot and grid plot of the two geologic profiles were obtained under the restriction of the correlative seismic, geoelectric and geologic data. Primary analysis and explanation on several important geologic problems were made combining with the other materials in this aisle, more understood was got for the distribution of formation, basement, fracture and volcanic rocks in Qiangtang petroleum geologic aisle, and this provided some new evidences for the geologic explanation and hydrocarbon prospect evaluation of the whole Qiangtang Basin.

关 键 词：重磁视深度滤波 重磁模拟解释系统 解释断面图和栅状图 羌塘盆地 

分 类 号：P631.4[天文地球—地质矿产勘探]