摘要
对甲基葡萄糖苷(MEG)的页岩抑制作用、水溶液活度、生物毒性、对泥页岩膜效率的影响及对高密度钻井液流变性能和滤失性能的影响进行了研究,并对MEG防塌及改善钻井液流型的作用机理进行了分析。结果表明,MEG抑制泥页岩水化膨胀、分散的作用较弱,ω(MEG)=25%的溶液膨润土膨胀抑制率仅为10.55%,但能大幅度提高泥页岩的膜效率且能有效降低钻井液的水活度,上述溶液使泥页岩膜效率提高率达202%,MEG单独或与盐复配使用可将水活度降到0.85以下,通过渗透作用降低钻井液向地层滤失是MEG的主要防塌机理;MEG无毒,对高密度钻井液具有很好的流型改善作用,用MEG配制的钻井液具有组成简单、高温稳定性好和抗污染性强等特点。
The performances of MEG, including shale inhibition, water activity, toxicity and its effect on shale membrane efficiency and high density drilling fluid rheological and filtrating properties, were studied in laboratory. With the addition of 25% MEG, the inhibiting expansion ratio of shale is just about 10. 55%, the water activity can be lowered to below 0. 85 and the shale membrane efficiency can be increased by 202%. The major anti-collapse mechanism of MEG is believed to be originated from decreasing drilling fluid loss through osmosis. Using MEG to prepare drilling fluids possesses virtues, besides nontoxic and improvement in terms of rheological properties, suchas simple components, high temperature stability and good resistance to clay and gypsum.
出处
《应用化学》
CAS
CSCD
北大核心
2006年第6期632-636,共5页
Chinese Journal of Applied Chemistry
基金
中国石油天然气集团公司(CNPC)科技攻关项目(2097070315)
关键词
甲基葡萄糖苷
抑制作用
膜效率
活度
钻井液
methyl glucoside,inhibition, membrane efficiency, water activity, drilling fluid
