摘要
通过实验优选出适合海洋深水钻井的高盐/阳离子聚合物钻井液体系。该体系以20%NaCl作为水合物抑制剂,以高分子量的阳离子聚合物作为絮凝剂,以小分子量的阳离子聚合物作为粘土稳定剂,配合降滤失剂、增粘稳定剂、润滑剂等配制而成。室内实验表明:该体系具有良好的流变性、较强的抗污染能力、较强的抑制性和良好的油气层保护能力,同时能阻止低温下天然气水合物的形成,满足今后的海洋深水勘探需要,减少深水钻井作业风险。
By experimental study, we optimize a drilling-fluid system of high salinity/cationic polymer available for marine deepwater drilling. The system takes 20% NaCl as a hydrate inhibitor, cationic polymer with high molecular weight as a flocculant, cationic polymer with small molecular weight as a clay stabilizer. Meanwhile, combing fluid loss additive, viscofier with lubricant, the system is prepared. The lab experiments illustrate that the drilling-fluid system is characterized by better rheology property, stronger anti-pollution and inhibition, and better reservoir protection. And it prevents the formation of gas hydrate under low temperature, meets the exploration demand of marine deepwater in the future and decreases the operation risk in deepwater drilling.
出处
《天然气勘探与开发》
2007年第3期59-62,共4页
Natural Gas Exploration and Development
