倾斜电各向异性地层阵列感应测井数据处理新方法

doi:10.7623/syxb202210007

石油学报 ›› 2022, Vol. 43 ›› Issue (10): 1439-1449.DOI: 10.7623/syxb202210007

倾斜电各向异性地层阵列感应测井数据处理新方法

李潮流¹, 武宏亮¹, 李霞¹, 胡法龙¹, 田瀚¹, 黄玉越², 袁超¹

1. 中国石油勘探开发研究院北京 100083;
2. 中国石油大学(北京)地球科学学院北京 102249

收稿日期:2021-08-23 修回日期:2022-01-25 出版日期:2022-10-25 发布日期:2022-11-05
通讯作者: 李潮流,男,1973年9月生,2007年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院教授级高级工程师,主要从事碎屑岩储层岩石物理与测井处理解释方法研究。
作者简介:李潮流,男,1973年9月生,2007年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院教授级高级工程师,主要从事碎屑岩储层岩石物理与测井处理解释方法研究。Email:leechl@petrochina.com.cn
基金资助:
中国石油天然气集团有限公司"十四五"前瞻性基础性战略性技术攻关项目"深部多重孔隙介质储层测井实验及评价新方法"(2021DJ3804)资助。

A new data processing method of array induction logging for inclined electrical anisotropic formation

Li Chaoliu¹, Wu Hongliang¹, Li Xia¹, Hu Falong¹, Tian Han¹, Huang Yuyue², Yuan Chao¹

1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
2. College of Geosciences, China University of Petroleum, Beijing 102249, China

Received:2021-08-23 Revised:2022-01-25 Online:2022-10-25 Published:2022-11-05

摘要/Abstract

摘要： 阵列感应测井的原始信号经软件聚焦算法处理后可提供多种分辨率、不同探测深度的电阻率信息,这使得阵列感应测井成为复杂油气层测井评价的重要手段。然而,当在深层致密储层和非常规储层等电各向异性储层中采用斜井进行钻探时,由于传统软件聚焦算法没有考虑地层倾斜及其电各向异性的影响,常规阵列感应测井输出结果的适用性受到极大挑战,其电阻率曲线常出现钻井液假侵入、曲线乱序等异常现象。针对这一问题,提出以未聚焦的原始电阻率为约束,在已知仪器与地层相对夹角和目的层电各向异性系数的前提下,通过建立层状地层模型,结合仪器的正演算法模拟电阻率响应特征并与实测电阻率曲线进行误差比较,不断修改模型以进行迭代循环计算,从而得到等效的水平电阻率和垂直电阻率阵列感应测井曲线。该方法有效地剔除了地层倾角及其电各向异性的影响,且进一步通过分辨率匹配处理可获得具有给定分辨率、能完全保留钻井液侵入特征的地层水平方向和垂直方向的阵列感应电阻率曲线,显著提高了复杂储层的电阻率测量精度和测井解释符合率。相关算法得到了理论模型和多口实际测井资料的验证。

关键词: 阵列感应测井, 电阻率测井, 大斜度井, 各向异性, 测井解释

Abstract: After being processed by software focusing algorithm, the original signals of array induction logging can provide resistivity information of multiple resolutions and various detection depths. For this reason, array induction logging has become an important logging evaluation technique for complex oil and gas reservoirs. However, when deviated well are used for drilling in electrical anisotropic reservoirs such as deep tight reservoirs and unconventional reservoirs, since conventional software focusing algorithm does not take into account the impact of inclination and electrical anisotropy of formation, it is a great challenge to apply the output results of conventional array induction logging in actual fields, and the resistivity curve often has abnormalities such as false invasion of drilling fluid and curve disorder. To address this problem, this paper puts forward to build a layered formation model with non-focusing original resistivity as constraint and under the premise of knowing the relative angle between the instrument and the formation, as well as the electrical anisotropic coefficient of the target stratum. The resistivity response characteristics were simulated by the forward algorithm of the instrument and the error was compared with the measured resistivity curve. Iterative calculations were performed by modifying the model until equivalent horizontal and vertical resistivity array induction logging curves were obtained, which has significantly improved the resistivity measurement precision and the coincidence rate of logging interpretation for complex reservoirs. The relevant algorithms are validated by theoretical models and practical drilling data.

Key words: array induction logging, resistivity logging, highly deviated well, anisotropy, log interpretation

中图分类号:

P631.8

李潮流, 武宏亮, 李霞, 胡法龙, 田瀚, 黄玉越, 袁超. 倾斜电各向异性地层阵列感应测井数据处理新方法[J]. 石油学报, 2022, 43(10): 1439-1449.

Li Chaoliu, Wu Hongliang, Li Xia, Hu Falong, Tian Han, Huang Yuyue, Yuan Chao. A new data processing method of array induction logging for inclined electrical anisotropic formation[J]. Acta Petrolei Sinica, 2022, 43(10): 1439-1449.

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倾斜电各向异性地层阵列感应测井数据处理新方法

A new data processing method of array induction logging for inclined electrical anisotropic formation

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