物探化探计算技术
物探化探計算技術
물탐화탐계산기술
COMPUTING TECHNIQUES FOR GEOPHYSICAL AND GEOCHEMICAL EXPLORATION
2014年
3期
297-303
,共7页
广域电磁法%近区%低阻薄层
廣域電磁法%近區%低阻薄層
엄역전자법%근구%저조박층
wide field electromagnetic sounding method%near field%low resistance thin layer
对E-Ex 模式广域电磁法对低阻薄层结构的分辨能力和在传统意义上“近区”的勘探能力进行了探讨。近期关于广域电磁法的工作重心都放在二、三维正反演上，从一维响应出发，设置了几组含有低阻薄层结构的一维地质模型，正演得出全区视电阻率曲线，了解到广域电磁法对低阻薄层的分辨能力；分析曲线特征，并与可控源音频大地电磁法（CSAMT）一维数值模拟结果进行对比，得出广域电磁法在“近区”工作的优越性。
對E-Ex 模式廣域電磁法對低阻薄層結構的分辨能力和在傳統意義上“近區”的勘探能力進行瞭探討。近期關于廣域電磁法的工作重心都放在二、三維正反縯上，從一維響應齣髮，設置瞭幾組含有低阻薄層結構的一維地質模型，正縯得齣全區視電阻率麯線，瞭解到廣域電磁法對低阻薄層的分辨能力；分析麯線特徵，併與可控源音頻大地電磁法（CSAMT）一維數值模擬結果進行對比，得齣廣域電磁法在“近區”工作的優越性。
대E-Ex 모식엄역전자법대저조박층결구적분변능력화재전통의의상“근구”적감탐능력진행료탐토。근기관우엄역전자법적공작중심도방재이、삼유정반연상，종일유향응출발，설치료궤조함유저조박층결구적일유지질모형，정연득출전구시전조솔곡선，료해도엄역전자법대저조박층적분변능력；분석곡선특정，병여가공원음빈대지전자법（CSAMT）일유수치모의결과진행대비，득출엄역전자법재“근구”공작적우월성。
The superiority of the E-Ex mode of Wide field electromagnetic sounding method (WFEM)on near field and distin-guishing ability of the structure with a thin layer with low resistance is discussed.More concerns were put on the 2D or 3D for-ward and inversion computation recently.While this paper set up several groups of 1D geological model containing low resist-ance thin layered structure,drawing the apparent resistivity curves,analyzing features of curves,and knowing the ability of distinguishing the low resistance with thin layer structure.And then compared with the one-dimensional numerical simulation results of CSAMT,the contrasted result shows the superiority of the E-Ex mode of wide field electromagnetic sounding meth-od on near field,and helps to know the aspects of wide field apparent resistivity.
