大庆油田低密度低温防窜水泥浆体系  

Low Density Low Temperature Anti-Channeling Cement Slurry Used in Daqing Oilfield

作　　者：侯力伟[1] 

机构地区：[1]大庆钻探工程公司钻井工程技术研究院,黑龙江大庆100142

出　　处：《钻井液与完井液》2016年第4期79-82,共4页Drilling Fluid & Completion Fluid

基　　金：中国石油天然气股份有限公司"重大钻井技术集成配套与装备现场试验"(2014D-4410)

摘　　要：针对大庆油田低温浅层气井长封段固井中,低密度水泥浆终凝时间长,胶凝强度发展缓慢,失水大,防窜性能差,易产生环空气窜及管外冒气等现象,影响了固井质量。研究了低密度低温防窜水泥浆体系,采用复合型早强剂、聚丙烯酸酯聚合物胶乳降失水剂、可分散聚合物胶粉防窜剂,改善低密度水泥浆综合性能,在低温条件下,凝结时间缩短了50%,早期强度提高了46%,渗透率降低了50%,界面胶结强度提高了47%。现场应用18口井,固井优质率提高了11.1%,管外冒发生率降低了1.6%,低密度低温防窜水泥浆体系能够满足固井施工作业要求,提高了低温浅层长封井固井质量。In commenting the long, low temperature wellbore with shallow gases in Daqing, the low density cementing slurries used had long final setting time, slowly developing gel strengths, high filter loss, and poor anti-channeling performance. All these factors contributed to channeling in annular spaces and bubbling outside the casing string, indicators of poor cementing job. In studying the low density low temperature anti-channeling cement slurry, the cement slurry was treated with a compound early strength agent, a polyacrylate filter loss reducer and a dispersible polymer anti-channeling agent, all being used to improve the overall performance of the slurry. At low temperatures, the setting time was shortened by 50%, the early strength increased by 46%, permeability reduced by 50%, and the bond strength of the interface enhanced by 47%. The cement slurry formulation has been used in 18 wells, and 11.1% of the cementing jobs were of excellent quality, bubbling outside the casing string was reduced by 1.6%. The use of the low density low temperature anti-channeling cement slurry improved the quality of the cementing jobs.

关 键 词：低密度 复合型早强剂 防窜水泥浆 胶凝强度 固井质量 

分 类 号：TE256.6[石油与天然气工程—油气井工程]