Azimuthal cement evaluation with an acoustic phased-arc array transmitter:numerical simulations and field tests  

基于相控圆弧阵的方位声波固井质量评价:数值模拟与现场测试（英文）

作　　者：车小花[1,2] 乔文孝[1,2] 鞠晓东[1,2] 王瑞甲[1,2] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京昌平102249 [2]北京市地球探测与信息技术重点实验室,北京昌平102249

出　　处：《Applied Geophysics》2016年第1期194-202,222,共10页应用地球物理（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11204380,11374371,61102102,and11134011);National Science and Technology Major Project(No.2011ZX05020-009);China National Petroleum Corporation(Nos.2014B-4011,2014D-4105,and 2014A-3912);PetroChina Innovation Foundation(No.2014D-5006-0307)

摘　　要：We developed a novel cement evaluation logging tool,named the azimuthally acoustic bond tool（AABT）,which uses a phased-arc array transmitter with azimuthal detection capability.We combined numerical simulations and field tests to verify the AABT tool.The numerical simulation results showed that the radiation direction of the subarray corresponding to the maximum amplitude of the first arrival matches the azimuth of the channeling when it is behind the casing.With larger channeling size in the circumferential direction,the amplitude difference of the casing wave at different azimuths becomes more evident.The test results showed that the AABT can accurately locate the casing collars and evaluate the cement bond quality with azimuthal resolution at the casing-cement interface,and can visualize the size,depth,and azimuth of channeling.In the case of good casingcement bonding,the AABT can further evaluate the cement bond quality at the cementformation interface with azimuthal resolution by using the amplitude map and the velocity of the formation wave.我们研制了一种基于相控圆弧阵声波辐射器的新型方位声波固井质量仪器(AABT),并结合数值模拟及现场测量实例对仪器进行了验证。研究了周向不同角宽的窜槽和窜槽尺寸固定但相控圆弧阵声波辐射器的辐射声束主瓣方向改变时对套管波的影响。数值模拟结果显示,套管波幅度最大的那一道波形所对应的圆弧阵子阵辐射脉冲主瓣方向恰好是条状窜槽的方位角位置。随着水泥窜槽的周向角宽的增大,周向不同辐射方位激励时产生的套管波幅度的差异更明显。对基于相控圆弧阵声波辐射器的AABT仪器在中国的北部和西部油田进行了现场测试,现场测量结果表明,AABT可以评价套管接箍的位置以及套管一水泥界面周向方位胶结质量,直观地显示窜槽大小、位置及方位;在套管一水泥界面胶结质量好的情况下,通过地层波幅度和速度成像,可以对水泥-地层界面的周向方位胶结质量进行评价。

关 键 词：Cement bond quality phased-arc array transmitter azimuthal resolution AMPLITUDE arrival time 

分 类 号：TE256[石油与天然气工程—油气井工程]