测井技术2026，Vol.50Issue(2)：203-216,287,15.DOI:10.16489/j.issn.1004-1338.2026.02.001
扫频介电测井响应特征与快速均质反演方法
Response Characteristics and Fast Homogeneous Inversion Method for Sweep-Frequency Dielectric Logging
摘要
Abstract
To address the issues of low computational efficiency and non-uniqueness in iterative homogeneous inversion of swept-frequency dielectric logging,this paper aims to develop a fast homogeneous inversion method that balances speed and accuracy.The study is conducted using the Schlumberger's array dielectric tool(ADT)as an example.First,a homogeneous response database is calculated and established,and the tool's homogeneous response characteristics are systematically analyzed.Subsequently,based on the tool's response characteristics in different electrical property parameter intervals,a non-uniform template local refinement sampling scheme is proposed:sampling the dielectric constant with piecewise linear distribution and sampling the conductivity with log-linear distribution.Correspondingly,a fast homogeneous inversion method using this non-uniform template is developed.Optimization of the refinement sampling scheme and corresponding inversion performance tests are carried out.Finally,the proposed fast homogeneous inversion method is applied to and validated by processing data from forward modeling responses of heterogeneous models and actual field logging responses.The research results indicate:①With the increase of template sampling density,the inversion time only increases by approximately 3 times.Within the template,the mean absolute percentage errors of inverted dielectric constant and conductivity decrease by about 89.0%and 82.3%,respectively.Outside the template,these errors decrease by up to approximately 97.5%and 97.3%.This demonstrates a significant improvement in accuracy with a minor increase in computational cost,achieving a favorable balance between efficiency and precision.②For both the heterogeneous model forward responses and the field measurement data,the apparent dielectric constants and conductivities obtained by the proposed fast homogeneous inversion method for different polarizations and spacings show good agreement with the results from Schlumberger's homogeneous inversion.③The average inversion time for a single measurement point response data in a single working mode on a standard computing device is only about 4.5 ms,meeting the requirements for engineering applications.The fast homogeneous inversion method proposed in this paper provides reliable technical support for the efficient processing of swept-frequency dielectric logging data.关键词
扫频介电测井/阵列介电仪/响应特征/均质反演/交会图版/非均匀图版/视介电常数/视电导率Key words
sweep-frequency dielectric logging/ADT/response characteristic/homogeneous inversion/crossplot/non-uniform crossplot/apparent dielectric constant/apparent conductivity分类
天文与地球科学引用本文复制引用
罗虎,柯式镇,贺秋利,石洪玮,张宇航,胡昊..扫频介电测井响应特征与快速均质反演方法[J].测井技术,2026,50(2):203-216,287,15.基金项目
国家自然科学基金项目"基于格子波尔兹曼法的岩石电频散模型及微观机理研究"(42074126) （42074126）
安徽省高校自然科学研究一般项目"基于FDTD与神经网络的随钻电阻率测井快速正演仿真方法研究"(KJ2021B02) （KJ2021B02）
