摘要
针对天然气水合物钻探对固井水泥浆的特殊要求,经过大量试验,优选出一种新型低温低密度水泥浆体系:100%G级油井水泥+15%漂珠+10%~15%微硅+8%超细矿渣+1%消泡剂+0.5%降失水剂+2.5%分散剂+2%硅烷偶联剂+5.6%~6%偏硅酸钠+8%~8.5%氯化钙+0.3%三乙醇胺+1%氯化钠(水固比0.7)。该水泥浆体系在低温条件下的密度、稠化时间、抗压强度、流变性和泌水量均可满足天然气水合物钻探固井要求。
In view of the special requirements for cementing slurry in natural gas hydrate drilling,a new low-temperature and low-density cementing slurry formula was obtained with a number of experiments,the composition is 100% class-G oil well cement ＋ 15% floating beads ＋ 10%~15% micro silicon ＋ 8% superfine slag ＋ 1% defoaming agent ＋ 0.5%fluid loss additive ＋ 2.5% dispersant ＋ 2% silane coupling agent ＋ 5.6%~6% sodium metasilicate anhydrous ＋ 8%~8.5% calcium chloride ＋ 0.3% triethanolamine ＋ 1% sodium chloride with 70% water-solid ratio.The slurry system can meet the cementing requirements of natural gas hydrate drilling in density,thickening time,compressive strength,rheology and bleeding at low temperature.
出处
《探矿工程（岩土钻掘工程）》
2018年第1期24-27,共4页
Exploration Engineering:Rock & Soil Drilling and Tunneling
基金
国家重大科技专项子课题"低品位油气储层水平井固井完整性评价与控制新技术"(编号:2017ZX05009003-003)
关键词
天然气水合物
低温
低密度
水泥浆
固井
natural gas hydrate
low temperature
low density
cementing slurry
well cementation
