区域磁异常在深层火山岩预测中的应用  

APPLICATION OF THE REGIONAL MAGNETIC ANOMALY IN THE PREDICTION OF THE DEEP VOLCANIC ROCK

作　　者：李桂荣[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2013年第3期140-143,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重点基础研究发展计划(973)项目(2009CB219307)

摘　　要：通过对松辽盆地磁异常的处理、解释提取了反映盆地深层火山岩的磁异常信息。认为:深层火山岩产生的磁异常主要表现为叠加在强背景之上的次级异常;盆地内平缓、幅值较大的高磁异常是侵入岩体的反映;火山岩埋深的差异对应用磁异常圈定、识别火山岩具有较大影响;积分一迭代延拓平化曲方法可以增强火山岩磁异常信息并均衡磁异常;松辽盆地深层具有良好的火山岩气藏勘探前景。该方法对类似地区深层火山岩的预测具有借鉴作用。The magnetic anomaly information is extracted to reflect the deep volcanic rock with the help of the process and interpretation of the abnormal geomagnetism in Songliao Basin. The studies show that the anomaly is characterized by sub-anomaly superimposed against the strong background; the gentle and higher magnetic anomaly with larger amplitude in the basin is the reflection of the intrusive rocks; the delineation and identification of volcanic rocks by the magnetic anomaly are seriously influenced by the differences of the volcanic rock depth; the magnetic anomaly can be enhanced and balanced by integral-iterative continuing and flattening method; much better exploration prospects of the volcanic gas reservoirs are featured in deep Songliao Basin. The method possesses a certain references for the prediction of the deep volcanic rocks in those similar area.

关 键 词：松辽盆地 深层火山岩 火山岩磁异常 磁异常分离 磁异常增强 

分 类 号：P631[天文地球—地质矿产勘探]