井～地充电法地表电位分布正演数值模拟研究

FORWARD NUMERICAL MODELING OF SURFACE ELECTRICAL POTENTIAL DISTRIBUTION BY THE BOREHOLE-TO-SURFACE MISE-A-LA-MASSE METHOD

这里模拟井～地充电法野外实测的模型,通过对三个不同模型的正演模拟研究,分别讨论了异常体的动态变化对地表电位的影响,延长异常体对地表电位的影响,以及异常体埋深变化对地表电位的影响。研究地下低阻地质体在地表电位异常的分布特征,并就井～地充电法用于监测油田开发中的注水推进问题,进行了理论模拟研究。对模拟资料进行了正演定性解释,讨论了地表电位相对于背景场产生的电位差峰值的变化,以及油田注水推进不同时间段地表电位在地表产生的影响。本次正演模拟资料可以用于推断注水推进的位置,流体的走向以及产状,对以后油田注水推进有很大的帮助。

The thesis introduced our study of forward numerical modeling for three different models by modeling outdoor measurement using borehole-to-surface mise-a-la-masse method and discussed the influence of the anomalous body dynamic variety upon the earth's surface electric potential,the influence of prolong anomalous body on the earth's surface electric potential and the influence of the anomalous body depth variety on the earth's surface electric potential.We carried out theoretical modeling to study the distributing characteristic of the underground low-resistivity body and monitoring water injection pushing direction in the oil-field development by using borehole-to-surface mise-a-la-masse method,and the influence of different stage of oil-field water injection pushing on the earth's surface electric potential.The data of forward modeling can be used for estimating the location of water injection,the direction and attitude of liquid.It is helpful that can make use of posting the water injection in the oil field.