川东北地区高密度防气窜水泥浆体系研究  

Research of High-Density Cement Slurry to Prevent Gas Migration in Northeast Sichuan

作　　者：邹建龙 高永会 朱海金 刘爱萍 汤少兵 

机构地区：[1]中国石油海洋工程有限公司固井事业部,天津塘沽300451

出　　处：《石油钻探技术》2010年第1期46-49,共4页Petroleum Drilling Techniques

基　　金：中国石油天然气集团公司科技项目"天然气井固井水泥环封隔性能研究"(编号:2008A-2304)部分研究成果

摘　　要：川东北地区地质条件复杂,存在多套压力系统,同一口井易出现塌、漏、涌、卡等异常情况,而且该地区气层活跃,经常钻遇高压气层,固井防气窜难度大。针对该地区高压气井固井难点,对水泥浆各项性能提出了要求,认为应制备具有良好防气窜能力的高密度水泥浆体系。通过优选高密度外掺料及高温防气窜剂,并以紧密堆积理论为指导,设计了高密度防气窜水泥浆。室内试验和现场应用结果均表明,设计的高密度防气窜水泥浆流动性好、浆体稳定、稠化易调、失水量小、强度高,防气窜性能良好,可满足川东北地区高压气井的固井要求。该水泥浆体系在川东北地区的龙16井、剑门1井和富顺1井等应用了5井次,入井水泥浆密度最高2.50 kg/L,气层固井质量良好。Geology in Northeast Sichuan is very complicated. There exist multiple pressure systems which cause a lot of accidents, such as well bore collapse, mud losses, well kick and pipe sticking. High pressure gas zones are often encountered, and it is difficult to prevent gas migration. In order to solve these problems, high-density cement slurry which can effectively prevent gas migration is required. Based on the theory of close packing, through carefully selecting high-density materials and anti-gas migration additives, high-density cement slurry for high-pressure gas well is developed. Experiment studies and field tests show that this high density cement has good rheology, low fluid loss, high compression strength and effective anti-gas migration. Its comprehensive performance can meet the technical requirements for cemen- ting operation in high pressure gas zones. The high density gas migration prevention cement slurry has been used 5 times in wells of Long-16, Jianmen-landFushun-1 in Northeast Sichuan. The highest density is up to 2.50 kg/L, and all cementing job are qualified.

关 键 词：深井固井 高密度 水泥浆 紧密堆积 防气窜 川东北地区 

分 类 号：TE256.7[石油与天然气工程—油气井工程]