3D井地磁测联合反演技术及应用

3D joint inversion of surface and borehole magnetic data and its application

井中磁测和地面磁测资料的单独反演具有一定的局限性,容易造成反演结果的多解性.目前国内外对井中和地面磁测资料的联合反演研究较少.本文通过阐述3D井地磁测联合反演的基本原理、实现步骤及在大冶铁矿的应用,论证了该方法在找矿过程中的良好效果.该方法充分发挥了井中、地面磁测资料的优势和解释人员的经验,克服了单独使用井或地磁测资料作反演的缺陷,能够准确判断地下地质(矿)体的空间形态、位置.

It has certain limitations in inversion by borehole magnetic data or surface magnetic data alone. It can lead to inversion ambiguity easily. Now study on well and ground magnetic data joint inversion is few at home and abroad. In this paper, we demonstrate the good effect of the 3D borehole and surface magnetic data joint inversion method in prospecting, and present its principle, implementation steps and application in the Daye iron mine. This method takes full advantage of ground and well magnetic data, and experience of professional interpretation workers, overcomes the disadvantages of inversion by ground magnetic data or well magnetic data alone. It can determine positions and forms of subsurface geological bodies or ore bodies accurately.