石油勘探与开发 >

2020 , Vol. 47 >Issue 1: 77 - 85

DOI: https://doi.org/10.11698/PED.2020.01.07

油气勘探

各向异性地层阵列侧向电阻率响应仿真模拟及应用

  • 袁超 ,
  • 李潮流 ,
  • 周灿灿 ,
  • 肖琪瑶 ,
  • 李霞 ,
  • 范宜仁 ,
  • 俞军 ,
  • 王磊 ,
  • 邢涛
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  • 1. 中国石油勘探开发研究院,北京 100083;
    2. 中国地质大学（北京）,北京 100083;
    3. 中国石油大学（华东）,山东青岛 266555
袁超（1987-）,男,山东临朐人,博士,中国石油勘探开发研究院工程师,主要从事水平井测井资料处理解释、电法测井正反演、放射性测井数值模拟与处理解释工作。地址：北京市海淀区学院路20号,中国石油勘探开发研究院,邮政编码：100083。E-mail：yuanc@petrochina.com.cn

收稿日期: 2019-02-21

  网络出版日期: 2020-01-17

基金资助

中国石油天然气集团有限公司科学研究与技术开发项目（2019A-3608）

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Forward simulation of array laterolog resistivity in anisotropic formation and its application

  • YUAN Chao ,
  • LI Chaoliu ,
  • ZHOU Cancan ,
  • XIAO Qiyao ,
  • LI Xia ,
  • FAN Yiren ,
  • YU Jun ,
  • WANG Lei ,
  • XING Tao
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  • 1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    2. China University of Geosciences (Beijing), Beijing 100083, China;
    3. China University of Petroleum (East China), Qingdao 266555, China

Received date: 2019-02-21

  Online published: 2020-01-17

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摘要

研制等比例缩小阵列侧向测井物理模拟实验系统,并基于三维有限元数值方法建立相应地层模型,定量研究不同因素对测井响应的影响。实验与数值模拟结果误差小于5%,验证了数值模拟结果的可靠性,进一步利用数值模拟方法对地层相对倾角、电各向异性和钻井液侵入进行单因素分析,研究结果表明：①各向异性地层中相对倾角增加会引起电阻率的抬升,但是对电阻率的抬升值相对较小,相对倾角达到一定角度时会引起阵列电阻率5条曲线数值高低出现翻转;②电各向异性系数λ值增加也会引起地层电阻率的抬升,直井条件下λ值由1.0增加到1.5时会导致电阻率抬升约10%;③相比于地层相对倾角和电各向异性,钻井液侵入对测井响应影响更显著,并且各向异性地层中低阻钻井液侵入会改变5条曲线的顺序,其规律与电各向异性相反。以柴达木盆地英西油田实际测井资料为例,构建考虑钻井液侵入的各向异性倾斜地层模型,利用上述方法正演模拟结果与实测曲线变化规律基本一致,再次验证了该方法的准确性。为复杂井况各向异性地层多参数反演提供了理论依据。图13表2参21

关键词： 各向异性地层; 阵列侧向电阻率; 仿真模拟; 测井响应

本文引用格式

袁超 , 李潮流 , 周灿灿 , 肖琪瑶 , 李霞 , 范宜仁 , 俞军 , 王磊 , 邢涛 . 各向异性地层阵列侧向电阻率响应仿真模拟及应用[J]. 石油勘探与开发, 2020 , 47(1) : 77 -85 . DOI: 10.11698/PED.2020.01.07

Abstract

A scaling-down experiment system of array laterolog resistivity was developed, and a corresponding formation model was built by 3D finite element numerical method to study the effect of different factors on the logging response quantitatively. The error between the experimental and numerical results was less than 5%, validating the reliability of the numerical simulation method. The single factor analysis of the formation relative dip, resistivity anisotropy and drilling fluid invasion was carried out by numerical simulation method, and the results show that: (1) The increase of relative dip can lead to the increase of formation resistivity, but the increasing value is relatively small, and the values of five array resistivity curves will reverse when the relative dip angle reaches a certain degree. (2) The increase of anisotropic coefficient λ can also cause the formation resistivity to rise, and the resistivity will increase by about 10% when λ increases from 1.0 to 1.5 in vertical wells. (3) Drilling fluid invasion has a more significant effect on the logging response than the former two factors. The order of the five curves will change due to mud invasion in anisotropic formation and the change rule is contrary to resistivity anisotropy. Taking the logging data of the Yingxi oilfield in the Qaidam Basin as an example, an anisotropic formation model considering drilling fluid invasion was built, and the numerical simulation results from the above methods were basically consistent with the logging data, which verified the accuracy of the method again. The results of this study lay a theoretical foundation for multiple-parameter inversion in anisotropic formation under complex well conditions.

Key words： anisotropic formation; array laterolog resistivity; forward simulation; logging response

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