星探1井韧性防窜水泥浆技术  

Study and Application of a Tough Anti-Channeling Cement Slurry for Well Xingtan-1

作　　者：冯瑞阁 李玮[1,2] 孟仁洲 王俊杰 FENG Ruige;LI Wei;MENG Renzhou;WANG Junjie(MOE Key Laboratory of Enhancing Oil and Gas Recovery,Northeast Petroleum University,Daqing,Heilongjiang 163000;School of Petroleum Engineering,Northeast Petroleum University,Daqing,Heilongjiang 163000;CNPC Engineering Technology R&D Company Limited,Beijing 102206)

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163000 [2]东北石油大学石油工程学院,黑龙江大庆163000 [3]中国石油集团工程技术研究院有限公司,北京102206

出　　处：《钻井液与完井液》2023年第5期658-664,共7页Drilling Fluid & Completion Fluid

基　　金：中国石油集团十四五前瞻性基础性重大科技项目“复杂超深井固井密封完整性技术研究”(2021DJ4105);中国石油集团科学研究与技术开发项目“超深井安全固井关键材料与工具研发”(CPET202307)。

摘　　要：星探1井是吉林油田部署在长春双阳区境内的一口深层水平井,完钻井深为5758 m,水平段长为2015 m。针对该井漏失问题以及后期大型压裂对水泥环抗冲击能力要求比较高的难题开展研究,研发了具有“核-壳”结构的增韧防窜剂TA-1,基于此形成了韧性防窜水泥浆体系。TA-1具有弹性内核与柔性支链,能发挥增韧、成膜、与水化产物形成级配的作用。水泥浆性能测试结果表明,浆体稳定性好,稠化时间在150~350 min可调;SPN值达1.15,表现出较好的防窜能力;TA-1能降低水泥石弹性模量达29.5%,抗冲击能力提升16.4%,同时24 h强度大于20 MPa。韧性防窜水泥浆体系在星探1井固井中得到成功应用,解决了固井层内油气窜通和后期压裂水泥石易开裂等难题。The well Xingtan-1 is a deep horizontal well drilled in the Shuangyang district of Changchun city by the Jilin Oilfield.This well has a total depth of 5,758 m and horizontal section of 2,015 m.Studies were conducted on two problems,which are mud losses and strict requirement for the impact resistance of the cement sheath to withstand the effects of large scale fracturing jobs.A toughness enhancing anti-channeling agent TA-1 is developed.TA-1 is a product with“core-shell”structure,and is used to formulate an anti-channeling cement slurry with good toughness.The molecules of TA-1 have elastic cores and flexible molecular chains,and are able to improve the toughness of the cement slurry and form films.Test results of the performance of the cement slurry show that the slurry has good stability,with thickening time adjustable between 150 min and 350 min.The SPN value of the cement slurry is 1.15,indicating the cement slurry has good anti-channeling capacity.TA-1 reduces the elastic modulus of the set cement by 29.5%and enhances the impact resistance of the set cement by 16.4%.A cement slurry treated with TA-1 has 24-hour strength of greater than 20 MPa.Well cementing with this anti-channeling cement slurry on the well Xingtan-1 is successful,helping solve the problems of gas channeling through the cement sheaths and cracking of set cement during fracturing operation.

关 键 词：水泥浆 防窜 韧性 力学性能 固井 星探1井 

分 类 号：TE256[石油与天然气工程—油气井工程]