基于图版迭代法的阵列侧向测井井场反演算法研究  

Research on array lateral logging field inversion algorithm based on plate iterative method

作　　者：倪小威 刘炜博 何虎庄 赵庆广 侯少勇 陈柳 刘迪仁[3] NI XiaoWei;LIU WeiBo;HE HuZhuang;ZHAO QingGuang;HOU ShaoYong;CHEN Liu;LIU DiRen(PetroChina Tarim Oilfield Company Oil and Gas Field Productivity Construction Department of TOC,Korla 841000,China;PetroChina Tarim Oilfield Company Safety,Environmental Protection and Engineering Supervision Center,Korla 841000,China;School of Geophysics and Petroleum Resources of Yangtze University,Wuhan 430100,China)

机构地区：[1]中国石油塔里木油田分公司油气田产能建设事业部,库尔勒841000 [2]中国石油塔里木油田分公司安全环保与工程监督中心,库尔勒841000 [3]长江大学地球物理与石油资源学院,武汉430100

出　　处：《地球物理学进展》2022年第2期648-655,共8页Progress in Geophysics

基　　金：国家重点研发计划项目“地下及井中地球物理勘探技术与装备”(2018YFC0603300)资助.

摘　　要：阵列侧向测井资料井场快速反演是评价测井资料好坏和后续精细解释的基础,而目前二维反演算法处理阵列侧向测井资料虽可提高反演精度,但反演速度大大降低,不能满足实时快速反演的需要,因此有必要提出阵列侧向测井的井场反演算法.本文基于有限元正演数值模拟方法,研究了泥浆侵入对阵列侧向测井仪器的影响,形成了不同泥浆侵入条件下阵列侧向测井响应图版,并对测井响应图版进行规律分析和非线性拟合.基于最优化反演思想和非线性拟合得到的阵列侧向测井正演响应,形成了图版迭代法.基于图版迭代法,利用Oklahoma地层模型进行反演效果验证,结果表明:图版迭代法对复杂地层适应性较好,三参数反演误差可控制在8.7%以下.在此基础上,利用井场常用反演算法—马奎特算法和图版迭代法分别对同一井段阵列侧向测井资料进行反演处理,处理和对比结果表明图版迭代法较马奎特算法可更有效地恢复泥浆侵入剖面信息,反演结果更加符合MDT(模块式电缆地层动态测试仪)取样结论,而马奎特算法反演结果造成油水层误判,说明图版迭代法反演精度相较传统算法也有所提升,具备现场应用价值.Array lateral logging data well field inversion is the basis for evaluating well logging data and subsequent fine interpretation.Although the inversion accuracy can be improved by two-dimension inversion when processing array lateral logging data,the inversion speed is greatly reduced,which cannot satisfy the need of the inversion speed.Therefore,it is necessary to propose the wellsite inversion algorithm for array lateral logging.Based on the finite element forward numerical simulation method,the influence of mud intrusion on the array lateral logging instrument was studied in the paper,and the lateral log response plate of the array under different mud intrusion conditions was formed,and the plate was regularly analyzed and nonlinearly fitted.The array lateral logging response was obtained based on the optimization idea and nonlinear fitting,which formed the plate iterative method.Based on the plate iterative method,the Oklahoma stratum model is used to verify the inversion effect.The result shows that the plate iterative method has good adaptability to complex strata,and the three-parameter inversion error can be controlled below 8.7%.On this basis,the inversion algorithm of the same well segment array data is processed by the common inversion algorithm(Marquette algorithm)and the plate iterative method.The results show that the plate iterative method can recover the information of the mud invasion profile more effectively than the Marquette algorithm.And the inversion results are more consistent with the MDT(modular formation dynamics tester)sampling conclusions,but the results shows that the oil and water layers was miscalculated by Marquette algorithm inversion,indicating that the inversion accuracy of the plate iterative method is improved compared with the traditional algorithm,which shows the field application value.

关 键 词：泥浆侵入 阵列侧向测井 有限元 图版迭代法 反演 

分 类 号：P631[天文地球—地质矿产勘探]