摘要
油气资源和矿产资源勘探中,常需要较大的勘探深度和高的深部分辨能力,充分利用现有钻孔的三维井地电阻率成像技术能够适应于这种要求。通过设计一个高阻水平板状体模型,利用Ansys有限元软件对模型进行三维井地电阻率法有限元正演计算,并将模拟的响应视电阻率作为反演的输入,结合平滑约束最小二乘反演,分析了异常特征和分布规律,其结论和认识具有一定实用价值。
Relatively large exploration depth and good resolution at depth are usually required in oil-gas and mineral resources exploration. The borehole-surface electrical resistivity tomography technique can satisfy the demand. A typical synthetic geological model was designed in this paper, which is based on the simulation of the finite element method by using Ansys FEM software. The response apparent resistivity of the model acts as the input of the inversion. According to the results obtained by the smooth-constrained least square inversion method, this paper describes characteristics and distribution of the anomalies. The results and the recognition obtained obviously have some practical values.
出处
《物探与化探》
CAS
CSCD
北大核心
2009年第1期88-90,共3页
Geophysical and Geochemical Exploration
关键词
三维井地电阻率法
有限元法
油气资源勘探
地质模型
3D borehole-surface resistivity survey
Finite Element Method （FEM）
forward numerical modeling
inversion
