地-井断面IP正演模拟研究

Surface-borehole Cross-section IP Method Numerical Modeling and Data Explanation

地-井方位IP观测的数据量有限,不能进行精确反演解释,而地-井断面IP可获得相对较多数据,使异常的定量解释成为可能。采用三维有限数值模拟技术,对两例地电模型进行地-井断面方式模拟计算,对正演数据进行二维反演解释,结果表明在数据量相对充足的情况下,对地-井IP数据进行反演解释,可以更详细地了解井旁盲矿体的信息。

The observation data of surface-- borehole orientation IP method are so limited that the inversion interpretation can not be accurately made. But the surface--borehole cross--section method can obtain more data and make the abnormal quantitative interpreta- tion possible. Using the finite numerical simulation technique, two cases of geoeleetric models were simulated by the mode of surface--borehole section observation, and the data were inversed by least square with constrained conditions. The result shows that we can get more information about the blind ore if the observation data are sufficient enough.