声波测井技术评价水泥环密封完整性实验研究  

Experimental Study on Evaluation of Cement Sheath Sealing Integrity by Acoustic Logging Technology

作　　者：孙翀 幸雪松 王晓亮[2,3] 杨晓榕 张星宇 SUN Chong;XING Xue-song;WANG Xiao-liang;YANG Xiao-rong;ZHANG Xing-yu(CNOOC Research Institute Co.,Ltd.,Beijing 100028,China;Hubei Collaborative Innovation Center for Unconventional Oil and Gas,Yangtze University,Wuhan Hubci 430100,China;Jingzhou Jiahua Tech no logy Co.,Ltd.,Jingzhou Hubei 434000,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]长江大学非常规油气湖北省协同创新中心,湖北武汉430100 [3]荆州嘉华科技有限公司,湖北荆州434000

出　　处：《当代化工》2022年第5期1080-1084,共5页Contemporary Chemical Industry

基　　金：国家科技重大专项,海外复杂地层固井及修井液技术(项目编号:2017ZX05032004-004)。

摘　　要：近年来,随着勘探开发进程的深入开展,多数油田开发进入中后期,流体注入、酸化、压裂等增产改造措施得到广泛应用,越来越多的井却出现了环空带压,因此现有固井质量的评价方法已经不能满足实际需求,实现准确定量评价水泥环胶结质量是解决问题的关键。基于声波测井原理,室内制作Ⅰ、Ⅱ界面不同环空微间隙的水泥环模型模拟现场井下情况,利用水泥环声波测井固井质量评价装置,采用CBL/VDL的组合方式采集聚合物水泥声波测井曲线,对所测声波幅值通过二项式拟合,构建微环隙大小与一二界面固井胶结质量、封隔能力的关系曲线版图,并提出了Ⅰ、Ⅱ界面水泥环微环隙大小与水泥石胶结质量评判依据。In recent years, with the in-depth development of exploration and development process, most oil fields have entered the middle and late stage of development, and stimulation and transformation measures such as fluid injection,acidification and fracturing have been widely used. However, annulus pressure has appeared in more and more wells.Therefore, the existing evaluation methods of cementing quality can not meet the actual needs, the key to solve the problem is to accurately and quantitatively evaluate the cementing quality of cement sheath. Based on the principle of acoustic logging, the cement sheath models with different annulus micro gaps at interface Ⅰ and Ⅱ were made indoors to simulate the downhole situation. The cement sheath acoustic logging cementing quality evaluation device was used to collect the polymer cement acoustic logging curve in the combination of CBL/VDL. The measured acoustic wave amplitude was fitted through binomial formula to construct the relationship between the size of micro annulus and the cementing quality of interface Ⅰ and Ⅱ, sealing capacity, and the evaluation basis of cement sheath micro annulus size and cement stone cementation quality at interface Ⅰ and Ⅱ was put forward.

关 键 词：声波测井 微间隙 固井胶结质量 首波幅值 评价 

分 类 号：TE26[石油与天然气工程—油气井工程]