Quantitative Calculation and Correction of the Influence of Microannulus on Acoustic Amplitude Log
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摘要: 为了消除微环隙对声幅测井曲线的影响,提高固井质量评价精度,在分析声波在介质中传播特性的基础上,分别建立了胶结良好时和微环隙存在时的各界面分层介质模型,并对2种情况下声幅测井接收到的声波强度表达式进行了推导,得到了声幅比值的表达式。该表达式可以量化微环隙对声幅测井的影响,并对声幅测井曲线进行校正。实例应用表明,实例井声幅测井曲线在校正后的最高相对声幅值从57%~59%降至36%~38%,固井质量评价结果由原来的胶结差变为胶结一般。由此可以看出,微环隙对声幅测井评价固井质量的影响是很大的,很容易对固井质量产生错误的评价,因此有必要对其校正,以提高固井质量评价的准确性。Abstract: In order to eliminate the effect of microannulus on acoustic amplitude logging,improve the accuracy of cementing quality evaluation,on the basis of analyzing propagation characteristics of acoustic wave in media,various interface layered medium models for good cementation and cementation with microannulus were built,the received acoustic intensity of acoustic amplitude logging in these two cases was derived,and acoustic amplitude ratio expression was obtained.The expression quantifies the effect of microannulus on acoustic amplitude logging and can be used to correct the acoustic amplitude logging curve.Actual application showed that,after correction,highest relative sound amplitude decreased from 57%-59% to 36%-38%,and the cement quality evaluation turned from poor to average.It can be seen that microannulus has significant impact on the results of acoustic amplitude logging evaluation,causing error in evaluation of cementing quality,so its correction is necessary for improving the accuracy of cementing quality assessment.
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[1] 叶志富.固井质量影响因素及对策[J].天然气技术,2008,2(3):27-29. Ye Zhifu.Influencing factors of cementing quality and their strategies[J].Natural Gas Technology,2008,2(3):27-29. [2] 李世平,李建国,于东.国内固井质量检测技术发展现状分析[J].石油钻探技术,2008,36(5):84-86. Li Shiping,Li Jianguo,Yu Dong.Analysis of domestic cementing quality examination technology[J].Petroleum Drilling Techniques,2008,36(5):84-86. [3] 朱江林,许明标,赵景芳,等.固井质量评价常用的测井方法[J].国外测井技术,2007,22(5):45-48. Zhu Jianglin,Xu Mingbiao,Zhao Jingfang,et al.Logging methods of cementing quality evaluation[J].World Well Logging Technology,2007,22(5):45-48. [4] 秦文贵.中国石油固井技术现状及发展方向[J].石油科技论坛,2007,26(6):6-11. Qin Wengui.Status and development trend of well cementing technology of CNPC[J].Oil Forum,2007,26(6):6-11. [5] 夏竹君,李俊舫,游佳雄,等.复杂套管固井质量评价方法探讨[J].石油钻探技术,2006,34(5):49-51. Xia Zhujun,Li Junfang,You Jiaxiong,et al.A discussion about cementing quality evaluation methods for complex casing strings[J].Petroleum Drilling Techniques,2006,34(5):49-51. [6] 张兴国,高兴原,冯明.固井质量影响因素分析[J].钻采工艺,2002,25(2):10-13. Zhang Xingguo,Gao Xingyuan,Feng Ming.Analysis of influence factors on cementing quality[J].Drilling Production Technology,2002,25(2):10-13. [7] 李洪乾.水泥浆环空流动数值模拟及固井质量控制方法研究[D].成都:西南石油学院石油工程学院,2002. Li Hongqian.The annular flow numerical simulation of cementing slurry and the control method research of cementing quality[D].Chengdu:Southwest Petroleum Institute,School of petroleum Engineering,2002. [8] 苏道宁,冯世暄.岩石的声衰减与声频谱的变化[J].华东石油学院学报:自然科学版,1986,10(2):110-116. Su Daoning,Feng Shixuan.Ultrasonic attenuation rocks and spectrum variation[J].Journal of East China Petroleum Institute:Edition of Natural Science,1986,10(2):110-116. [9] Harness P E,Sabins F L,Griffith J E.New technique provides better low-density-cement evaluation[R].SPE 24050,1992.
[10] Schmitt D P,Bouchon M.Full-wave acoustic logging:synthetic micro seismograms and frequency-wave number analysis[J].Geophysics,1985,50(11):1756-1778.
[11] 田鑫,石兵波,章成广.SBT测井技术在塔河油田低密度固井质量评价中的应用[J].石油天然气学报,2007,29(2):75-77. TianXin,Shi Bingbo,Zhang Chengguang.Application of segmented bond tool(SBT)logging technique for evaluating low density cementing quality in Tahe Oilfield[J].Journal of Oil and Gas Technology,2007,29(2):75-77. [12] 高伟勤,孙培恒,赵士华,等.分区水泥胶结测井(SBT)的解释方法研究及应用[J].石油仪器,2005,19(3):56-57. Gao Weiqin,Sun Peiheng,Zhao Shihua,et al.Sector bond tool(SBT)and its applications to log angle well[J].Petroleum Instruments,2005,19(3):56-57. [13] 王爱民.扇区水泥胶结测井仪及在套管井的应用[J].测井技术,2003,27(增刊1):56-58. Wang Aimin.Sector cement bond tool and its application in the cased holes[J].Well Logging Technology,2003,27(supplement 1):56-58. [14] 苑宝玉.超声波室内定位系统[D].长春:长春理工大学光电工程学院,2010. Yuan Baoyu.Ultrasound indoor positioning system[D].Changchun:Changchun University of Science and Technology,School of OptoElectronic Engineering,2010. [15] Burnett D,Gutierres F,Serrano G.Improve filter cake clean up practices for horizontal well completions in unconsolidated sands:correlation models for filter-cake removal[R].SPE 77523,2002.
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