张盼^1,2,,
邓少贵^1,2,
胡旭飞³,
王磊^1,2,
王正楷^1,2,
袁习勇^1,2,
蔡联云^1,2
1. 中国石油大学(华东)地球科学与技术学院, 青岛 266580
2. 海洋国家实验室海洋矿产资源评价与探测功能实验室, 青岛 266071
3. 中国石油大学(北京)克拉玛依校区石油学院, 新疆 克拉玛依 834000

基金项目: 国家自然科学基金（41674131，41904109，42074134），中国石油科技创新基金（2020D-5007-0304）和页岩油气富集机理与有效开发国家重点实验室基金（20-YYGZ-KF-GC-11）共同资助


详细信息

作者简介: 张盼, 男, 1992年生, 博士, 主要从事电测井方法的研究.E-mail: upczhangpan@163.com

中图分类号: P631

收稿日期:2020-03-05
修回日期:2020-11-29
上线日期:2021-06-10

Detection performance and sensitivity of logging-while-drilling extra-deep azimuthal resistivity measurement

ZHANG Pan^1,2,,
DENG ShaoGui^1,2,
HU XuFei³,
WANG Lei^1,2,
WANG ZhengKai^1,2,
YUAN XiYong^1,2,
CAI LianYun^1,2
1. School of Geosciences in China University of Petroleum, Qingdao 266580, China
2. Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
3. China University of Petroleum-Beijing at Karamay, Xinjiang Karamay 834000, China


MSC: P631

--> Received Date: 05 March 2020
Revised Date: 29 November 2020
Available Online: 10 June 2021


摘要
摘要:本文给出超深随钻方位电磁波测井的仪器天线设计及探测模式信号定义；分析各探测模式的探测性能及对地层电阻率、倾角及各向异性的表征能力；定义方位角、井斜角及地层电阻率的敏感性函数，定性分析不同模式对地层参数的敏感性.研究结果表明，超深随钻方位电磁波测井各探测模式具有不同探测特性，探测模式Ⅰ利用对称设计识别地层边界，消除井斜角及电阻率各向异性的影响，在不同电阻率条件下优选频率及源距，达到最大探测范围；探测模式Ⅱ采用非对称设计，增强对倾角和电阻率各向异性的敏感性，在井斜角为60°时对电阻率变化尤为敏感；探测模式Ⅲ在任意井斜角下均不具有方位敏感性，能够有效表征地层电阻率，在水平井条件下受地层各向异性影响最小；探测模式Ⅳ在高角度及水平井条件下，能够有效识别电阻率各向异性信息.
关键词: 超深随钻方位电磁波测井/
探测模式/
各向异性地层/
敏感性函数

Abstract:This paper presents the antenna design and the signal definition of logging-while-drilling Extra-Deep Azimuthal Resistivity Measurement (EDARM) and systematic investigations on the detection performance and the sensitivity of formation parameters. The detection capabilities and characterization capabilities of each mode are discussed. The sensitivity function is proposed to describe the measurement properties of azimuthal, dipping angle and resistivity. A qualitative analysis is made to the sensitivity of detection mode to formation parameters to provide support for data analysis and processing. The results show that the detection modes of EDARM have distinct detection characteristics. Mode I adopts the symmetric configuration of signal components, which eliminates the effect of dipping angle and resistivity anisotropy in detecting the bed boundary. In the different formation resistivity conditions, optimizing the operation frequency and spacing permits to enhance the detection range of the instrument for advancing adjust the well trajectory. Mode Ⅱ, by contrast, utilizes the anti-symmetric manner of defining to strengthen the sensitivity of the dipping angle and resistivity anisotropy. According to the sensitivity analysis, the mode Ⅱ mainly reflects the sensitivity to a single parameter in different dipping angles and azimuths. Also, it is particularly sensitive to the change of resistivity when the dipping angle is 60°. Mode Ⅲ has no azimuth sensitivity at any dipping angle, based on the characteristics, which can effectively obtain formation resistivity and is the least affected by the vertical resistivity in horizontal wells. In mode IV, the sensitivity distributeion shows the positive and negative sensitivities changing alternately in different azimuths. It can effectively identify the resistivity anisotropy in high-angle deviated and horizontal wells.
Key words:Extra-Deep Azimuthal Resistivity Measurement (EDARM)/
Detection mode/
Anisotropic formation/
Sensitivity function



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