摘要
火成岩与围岩的岩石地球物理属性差异规律性较差,不同地区甚至不同层位间差异变化较大,同时火成岩发育状态和规模在三维空间上变化较快。火成岩埋藏深度一般较大,重、磁、电、震异常较弱,使得火成岩异常较难提取。本文运用重、磁、电、震联合建模正反演解释YS地区火成岩。在大地电磁和地震二维剖面上建立统一的地质模型,通过不断修正模型并实时正演计算重、磁、电响应,最终得到一个合理可靠的解释模型。利用本文方法,火成岩的解释精度得到显著提高,提升了地质成果的可靠性。
Igneous rock varies often greatly in different areas or in different horizons,at the same time,its configuration and scale change rapidly.The igneous rock is generally deeply buried and its geophysical anomalies are always weak,and difficult to be extracted.So it is very difficult to interpret igneous rocks by conventional methods.Therefore we propose a strategy to interpret igneous rocks with a joint inversion of gravity,magnetic,electromagnetic,and seismic data.The joint modeling and inversion are used to study igneous rocks.A unified geological model is established on 2 Dsection of magnetotelluric(MT)and seismic data.By iteratively correcting the model and real-time calculation of gravity,magnetic and electromagnetic responses,the difference between the forward modeling and the measured data is minimized,and a reasonable and reliable interpretation model is finally obtained.With the proposed strategy,the interpretation accuracy of igneous rocks is greatly improved,and the reliability of geological results is enhanced.
作者
陶德强
赵文举
张嵘鑫
柴艳宁
TAO Deqiang;ZHAO Wenju;ZHANG Rongxin;CHAI Yanning(GME&Geochemical Surveys,BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2018年第A01期330-334,20,共6页
Oil Geophysical Prospecting
基金
国家重点研发计划项目"面向深部资源勘查的重磁
电磁处理解释软件研发"(2018YFC0603602)资助
关键词
重磁电震联合建模
实时正演
火成岩
GeoGME
jointed modelling and inversion of gravity
magnetic
electromagnetic
and seismic data
realtime modelling
igneous rock
GeoGME