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随钻前视声波测井钻头前方声场特征研究

杨书博 乔文孝 赵琪琪 倪卫宁 吴金平

杨书博, 乔文孝, 赵琪琪, 倪卫宁, 吴金平. 随钻前视声波测井钻头前方声场特征研究[J]. 石油钻探技术, 2021, 49(2): 113-120. doi: 10.11911/syztjs.2021020
引用本文: 杨书博, 乔文孝, 赵琪琪, 倪卫宁, 吴金平. 随钻前视声波测井钻头前方声场特征研究[J]. 石油钻探技术, 2021, 49(2): 113-120. doi: 10.11911/syztjs.2021020
YANG Shubo, QIAO Wenxiao, ZHAO Qiqi, NI Weining, WU Jinping. The Characteristics of the Acoustic Field Ahead of the Bit in “Look-Ahead” Acoustic Logging While Drilling[J]. Petroleum Drilling Techniques, 2021, 49(2): 113-120. doi: 10.11911/syztjs.2021020
Citation: YANG Shubo, QIAO Wenxiao, ZHAO Qiqi, NI Weining, WU Jinping. The Characteristics of the Acoustic Field Ahead of the Bit in “Look-Ahead” Acoustic Logging While Drilling[J]. Petroleum Drilling Techniques, 2021, 49(2): 113-120. doi: 10.11911/syztjs.2021020

随钻前视声波测井钻头前方声场特征研究

doi: 10.11911/syztjs.2021020
基金项目: 国家自然科学基金项目“海相深层高温高压钻完井工程基础理论及控制方法”(编号:U19B6003-05)、国家重点研发计划项目“复杂油气智能钻井理论与方法”(编号:2019YFA0708301)联合资助
详细信息
    作者简介:

    杨书博(1994—),男,河南开封人,2014年毕业于中国石油大学(华东)勘查技术与工程专业,2020年获中国石油大学(北京)地质资源与地质工程专业博士学位,助理研究员,主要从事声波测井正反演、随钻测量编解码和地质导向等方面的研究工作。E-mail:yangsb.sripe@sinopec.com。

  • 中图分类号: P631.8+1

The Characteristics of the Acoustic Field Ahead of the Bit in “Look-Ahead” Acoustic Logging While Drilling

  • 摘要: 现有声波测井仪器无法满足前视探测需求,为此开展了基于相控阵技术的随钻前视声波测井技术研究。采用相控线阵声波辐射器和相控圆弧阵声波接收站,分别实现声波能量的定向辐射和扫描接收;利用有限差分算法,分别模拟了随钻条件下钻头前方存在一个地层界面时的单极和相控阵声波测井响应。模拟结果表明,由于井底散射的影响,随钻前视声波测井的波场比常规反射声波测井的声场更为复杂;与单极声波辐射器相比,相控线阵声波辐射器能够定向增强辐射到钻头前方地层中的声波能量,可以显著增强P-P回波的幅度;与单极声波接收器相比,通过统计相控圆弧阵声波接收站扫描接收到的不同方位P-P回波的幅度,可以近似判断钻前地层界面的方位。研究结果验证了利用相控阵声波测井技术探测钻前地质异常体的可行性,为后续工业样机的开发提供了理论依据。

     

  • 图 1  相控阵声波测井仪器结构示意

    Figure 1.  Schematic diagram of the phased array acoustic logging tool

    图 2  相控阵原理示意

    Figure 2.  Schematic diagram of phased array principle

    图 3  随钻前视声波测井计算模型示意

    Figure 3.  Calculation model of “look-ahead” acoustic LWD

    图 4  不同时刻的波场快照

    Figure 4.  Snapshots of wave fields at different times

    图 5  不同源距下相控阵测量的接收波形

    Figure 5.  Received waveforms at different offsets in phased array measurement

    图 6  源距为3.00 m时单极测量和相控阵测量的井孔直达波与回波波形

    Figure 6.  Direct and echo waveforms in the monopole and phased array measurements at an offset of 3.00 m

    图 7  源距为3.00 m时单极测量的回波波形和相控阵测量的回波波形

    Figure 7.  Comparison of echo waveforms in the monopole and phased array measurements at an offset of 3.00 m

    图 8  不同源距下相控圆弧阵声波接收站的独立接收回波波形

    Figure 8.  Individual-reception echo waveforms of APA acoustic receiver stations at different offsets

    图 9  不同源距下独立接收P-P回波最大幅度随方位角的分布曲线

    Figure 9.  Distribution curves of maximum amplitude for individual-reception P-P echo waves with azimuths at different offsets

    图 10  不同源距相控圆弧阵声波接收站的扫描接收回波波形

    Figure 10.  Scanning-reception echo waveforms of APA acoustic receiver stations at different offsets

    图 11  不同源距下扫描接收P-P回波最大幅度随方位角的分布曲线

    Figure 11.  Distribution curves of maximum amplitude for scanning-reception P-P echo waves with azimuths at different offsets

    表  1  计算模型中各介质参数

    Table  1.   Parameters of each media in calculation model

    类型纵波波速/(m·s−1)横波波速/(m·s−1)密度/(kg·m−3)外半径/m
    流体1 500 01 0000.027
    钻铤5 8603 1307 8000.090
    流体1 500 01 0000.117
    地层12 7001 2002 000
    地层24 5002 6002 500
    下载: 导出CSV

    表  2  接收波形的传播路径及形式

    Table  2.   Transmission paths and forms of received waveforms

    波类型传播路径传播形式
    TR从声源直接传播至接收器钻铤波、滑行纵波、内斯通利波、外斯通利波
    TBR首先从声源传播至井底钻铤波、滑行纵波、内斯通利波、外斯通利波
    再从井底传播至接收器钻铤波、滑行纵波、内斯通利波、外斯通利波
    TIR首先从声源传播至地层界面地层纵波、地层横波
    再从地层界面传播至接收器地层纵波、地层横波
    TBIR首先从声源传播至井底钻铤波、滑行纵波、内斯通利波、外斯通利波
    然后从井底传播至地层界面地层纵波、地层横波
    最后从地层界面传播至接收器地层纵波、地层横波
    TIBR首先从声源传播至地层界面地层纵波、地层横波
    然后从地层界面传播至井底地层纵波、地层横波
    最后从井底传播至接收器钻铤波、滑行纵波、内斯通利波、外斯通利波
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-09-10
  • 修回日期:  2020-12-24
  • 网络出版日期:  2021-01-12
  • 刊出日期:  2021-04-09

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