摘要
基于MSR(Modified Sparse Row)非零元素存储和SSOR-PCG方程求解技术,编制了三维IP的有限元法快速正演程序,在此基础上,利用Delphi等开发了可视化地～井方位IP人机交互解释软件。在地～井方位IP的数据解释中,遵循"先井口,后其他方位"的分析方法,先通过井口方位观测曲线初步断定异常体的电性特征、大致埋深和倾向;然后对比分析其它方位曲线的异常特征,推断出异常的赋存方位。对于异常复杂情况,该软件可利用测井数据、钻孔柱状图等,形成分层背景,通过差值法和比值法数据预处理技术以突出井旁异常,提高异常分辨能力。实测数据的解释结果表明,针对地～井方位IP观测数据量少,充分利用测井、钻孔等信息,用人机交互正演拟合反演方式解释是可行的。
Based on 3-D FEM(finite element method) fast forward with MSR(Modified Sparse Row) to memory non-zero elements and SSOR-PCG to solve equations,man-machine interactive interpretation software for surface-borehole direction induced polarization survey is developed in Delphi 7.0.Following 'first the hole,after other positions' analysis method,we can define the electrical characteristics and spatial distribution of anomalous body roughly.Using the drilling and logging data aims to build the layered background model,and difference method and ratio method of data pre-processing techniques to improve the ability to distinguish abnormal.The results show that the interpretation of measured data,for the surface-borehole direction IP data,full use of logging,drilling and other information,employing man-machine interactive approach to forward fitting inversion is feasible.
出处
《物探化探计算技术》
CAS
CSCD
2012年第3期358-364,242,共7页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家自然科学基金(40774057)
全国危机矿山接替找矿项目新技术新方法示范项目(200799086)
广西自然科学基金(桂科自0832263)
关键词
地~井方位观测
有限单元法
IP
人机交互解释
软件
surface-borehole direction survey
finite element method(FEM)
induced polarization(IP)
man-machine interactive interpretation
software
