超高密度(ρ≥3.00g/cm^3)钻井液的研究与应用  

Study and application of ultra-high density drilling fluid

作　　者：胡德云[1] 

机构地区：[1]滇黔桂石油勘探局勘探开发研究院钻采所

出　　处：《钻井液与完井液》2001年第1期6-11,共6页Drilling Fluid & Completion Fluid

摘　　要：官3井二叠系阳新统存在压力系数为2.85的超高压地层,需用密度为2.92～3.00g/cm^3的钻井液钻井。通过研究重晶石的表面性质及其他技术指标,在优选出高效稀释剂和润滑剂的基础上,确定了可配制密度为3.02 g/cm^3钻井液的重晶石技术指标,并确定了钻井液中膨润土的最佳加量为10.4～12.5 g/L,稀释液为DQG-1碱液,润滑剂为1％～3％的FRH,护胶剂为PSC。经室内试验和在井深4000 m实钻应用证明,超高密度钻井液流变性,沉降稳定性及其他性能良好,配制及维护处理简易。Extremely high pressure formation exists in the Permian system of well Guan-3, with the pressure factor as high as 2. 85, and the high density drilling fluid of 2. 92- 3. 0 g/cm3 needs to he used. This paper tries to present a high density drilling fluid system for using in this condition. It investigates and determines the proper barite specifications, and the optimal clay usage as 10. 4- 12. 5 g/cm3; DQG-1 alkali lye is used as diluent, and 1% -3% of FRH as lubricant. FSC is used as colloid protecting agent. Laboratory test and field using in the 1000 m hole shows that the high-density system achieves good rheological properly and settling stability, and it's easy for field maintenance and treatment.

关 键 词：石油钻井 高密度钻井液 深井钻井 重晶石 钻井液添加剂 性能 

分 类 号：TE254.3[石油与天然气工程—油气井工程] TE245