雷琼地区滩海MT勘探可行性试验研究

为了进一步加快雷琼地区徐闻区块石油勘探进度,我们做了滩海MT技术论证.由于在海底密封、调整磁探头很困难,在技术论证中采用了磁电分离采集技术.文章从理论和实际资料两个方面阐述了大地磁场具有相对稳定性;利用Chave、Filloux推导的海底-海面水平电场与磁场关系式,处理了磁、电采集站分离不同距离和不同海水深度情况下在雷琼地区滩海采集的MT资料,通过与临近陆上MT结果对比,证明磁电分离采集技术是可行和有效的.

A FEASIBILITY TEST OF OFFSHORE MAGNETOTELLURIC PROSPECTING IN THE LEIQONG AREA

In order to further speed up progress of oil prospecting in the Xuwen section of Leiqong area,the technique argumentation for offshore MT project is needed.Magnetoelectricity separation collection technique is adopted,because it is very difficult to seal,orientate and level the magnetic inductor which used to measure seabed magnetic field.This paper theoretically expounds telluric magnetic field is relatively stable,and uses MT prospecting case to prove it.Relation between seabed electric field and sea surface magnetic field,deducted by Chave and Filloux(1984),is used to process the data collected by the test in which magnetic station and electric one are separated different interval and seawater depth.In contrast with land results,magnetoelectricity separation technique is further proved feasible and valid.