高强度低密度水泥浆体系的研究  

Studies on a High Strength Low Density Cement Slurry

作　　者：冯京海[1] 程远方[2] 贾江鸿[2] 刘小波[3] 南红刚[3] 刘斌[3] 

机构地区：[1]中科院地质地球物理研究所 [2]中国石油大学(华东)石油工程学院 [3]中国石化胜利油田公司东辛采油厂

出　　处：《钻井液与完井液》2007年第5期44-46,共3页Drilling Fluid & Completion Fluid

基　　金：中石油塔里木油田重点科技攻关项目<提高塔里木油田长封固段固井质量研究>部分研究成果

摘　　要：深井、高温井固井施工中水泥封固段顶底温差大,一次封固井段长,易发生水泥浆漏失、低返等问题,固井存在许多困难和风险。依据紧密堆积理论,研究出了低密度水泥浆体系并对其性能进行了综合评价。评价结果表明,该体系具有密度低、强度高,失水量小,流变性及稳定性好,耐高温、耐腐蚀及长效性等特性。现场应用200多井次,结果表明,使用该水泥浆体系,固井合格率为100%,优质率达90%,能有效解决长封固段低压易漏层油气井固井过程中的难点,保证了固井施工质量。In deep, high temperature well cement operation, a big difference between the temperatures at both ends of a long cement column existed. Cementing a long interval in one time may cause cement slurry losses into the formations. A low-density cement slurry was recently formulated based on theory of high-packing to solve the problem. Laboratory experiments showed that the formulated cement slurry had the advantages such as low density, high strength, low fluid loss and stable rheology, etc. This formulation was employed in more than 200 wells, all met the cement job requirements.

关 键 词：固井 漏失 低密度水泥浆 长封固段 长效性 

分 类 号：TE256.6[石油与天然气工程—油气井工程]