一种高密度盐膏层固井水泥浆的研究及应用  

Research and Application of High Density Cement Slurry on Salt/gypsum Formation.

作　　者：许前富[1] 罗宇维[1] 冯克满[1] 赵琥[1] 史元[1] 张国光[1] 

机构地区：[1]中海油田服务股份有限公司油田化学研究院

出　　处：《钻井液与完井液》2014年第1期68-71,100,共4页Drilling Fluid & Completion Fluid

摘　　要：针对伊拉克米桑油田高压盐膏层固井的特点,开发了一种高密度盐膏层固井水泥浆PC-HDS CMT。该水泥浆采用颗粒级配的赤铁矿粉进行加重,最高密度可达2.40 g/cm3;通过设计新的实验方法,优化了盐膏层固井水泥浆的配浆盐水的种类及浓度,采用5%低浓度氯化钾盐水配浆,使水泥浆在具有一定溶解抑制能力的同时,具有更快的强度发展速度和24 h抗压强度,更有利于封固高压盐膏层;优选了一种新型聚羧酸类分散剂,其具有优良的分散效果和抗盐防触变能力;同时研选了一系列其他性能优良的抗盐添加剂,使水泥浆的失水量可控,稠化时间可调,且具有微膨胀和防漏失能力。该水泥浆已在伊拉克米桑油田高压盐膏层固井作业中得到成功应用,解决了固井过程中井漏、固井作业后井口带压和井底窜流等问题。A new kind of high density cement slurry on salt/gypsum formation,PC-HDS CMT,was developed aiming at the reservoir characteristics of Missan Oilfield in Iraq.The highest density of it can reach to 2.40 g/cm^3 which weighed by hematite particle distributed at different size.The formulation optimized was achieved.5%KCl salt slurry had the properties of good solubility inhibition and fast development of cement strength.A novel polycarboxylic acid dispersing agent with thixotropic property and other salt tolerance additives were prepared to improve the performance.The PC-HDS CMT has been applied to cement job of salt/gypsum formation in Missan Oilfield and had solved serious problems successfully.

关 键 词：盐膏层固井 高密度水泥浆 水泥浆配方 伊拉克 米桑油田 

分 类 号：TE256[石油与天然气工程—油气井工程]