测井技术2025，Vol.49Issue(5)：676-684,9.DOI:10.16489/j.issn.1004-1338.2025.05.003
相邻井声波定位的数值模拟研究
Study on Numerical Simulation of Borehole Azimuthal Acoustic Reflection Imaging Logging in Adjacent Well Positioning
摘要
Abstract
To verify the feasibility of applying the azimuthal acoustic reflection imaging logging technology in the positioning of adjacent wells,and to address the issue that existing technologies mainly focus on the fixed distance between the target well and the measurement well without systematically studying the PP echo characteristics at different distances,in order to meet the requirements of anti-collision in shallow sea well clusters and rescue detection and positioning in accident wells,the three-dimensional finite difference method is used to numerically study the echo wave field of the target well beside the well when a monopole acoustic source radiates acoustic waves and a cylindrical array receives the acoustic waves.By changing the radial distance between the two(1,2,3,5,10 m),the relative amplitudes of different mode echoes and their relationship with the azimuth of the target well are analyzed.At the same time,the three-dimensional spatial scanning imaging processing is used to forward model the waveform data and obtain the horizontal plane target well imaging diagram perpendicular to the well axis.The research results show that:①Regardless of the radial distance between the target well and the measurement well,the PP echo characteristics recorded by the receiver array are relatively obvious,and the rate of decrease in the relative amplitude of the PP echo gradually slows down with the increase in the radial distance(for example,the echo amplitude is 146.37%of the sliding longitudinal wave amplitude at a radial distance of 1 m,7.32%at 5 m,and 3.53%at 10 m).②The receiver unit closest to the azimuth of the target well records the earliest arrival time and the strongest amplitude of the echo,and the azimuth angle corresponding to the maximum echo amplitude is consistent with the azimuth of the target well(90°).As the radial distance increases,the arrival time of the echo gradually becomes later and the maximum amplitude gradually decreases.③Based on the PP echo horizontal plane scanning imaging,the azimuth(90°)and radial position of the target well can be accurately determined(the imaging position is 2.15 m at a radial distance of 2 m,5.20 m at 5 m,and 10.10 m at 10 m),and the single shot point acquisition and horizontal plane scanning imaging mode can achieve synchronous measurement and processing and real-time detection.④When the radial distance is relatively close,the characteristics of different mode echoes(PP,PS,SP,SS echoes)of the target well are obvious,and when the distance is relatively far,the amplitude of the PP echo is relatively large,while the amplitudes of the converted waves(PS,SP echoes)and SS echoes are relatively small.The conclusion is that the azimuthal acoustic reflection imaging logging technology is feasible for application in the positioning of adjacent wells.The PP echo based on the monopole acoustic source radiating acoustic waves and the cylindrical array receiving the acoustic waves can effectively locate the adjacent target well,and the horizontal plane scanning imaging can accurately determine the azimuth and radial position of the target well and achieve real-time detection.关键词
方位声波远探测/邻井定位/数值模拟/三维有限差分法/PP回波/水平面扫描成像/径向距离/柱面阵接收Key words
azimuthal acoustic reflection imaging logging/adjacent well positioning/numerical simulation/3D finite difference method/PP echo/horizontal plane scanning imaging/radial distance/cylindrical array reception引用本文复制引用
赵龙,车小花,赵腾,张利伟,卢俊强..相邻井声波定位的数值模拟研究[J].测井技术,2025,49(5):676-684,9.基金项目
国家自然科学基金项目"三维散射声波远探测扫描成像测井方法研究"(12274465) （12274465）
国家自然科学基金项目"井旁任意空间剖面声波成像的方法研究"(12504558) （12504558）
中国海洋石油集团有限公司科技专项"旋转导向谱系化技术与产业化研究"(KJGG-2022-1402) （KJGG-2022-1402）
