蒙古国塔木察格油田钻井液技术  

Drilling Fluid Technology in Tamtsag Oilfield of Mongolia

作　　者：陈德铭 巩建军 蒲庆如 张明庆 徐兴军 徐东升 赵利 

机构地区：[1]渤海钻探第二钻井工程公司泥浆技术服务中心 [2]渤海钻探长庆石油工程事业部

出　　处：《钻井液与完井液》2010年第6期92-94,共3页Drilling Fluid & Completion Fluid

摘　　要：蒙古国塔木察格油田在钻井施工过程中钻遇伊敏组地层大段泥岩,易吸水膨胀、缩径,造成起钻拔活塞、下钻遇阻;大磨拐河组和南屯组地层在钻进中易发生井垮;铜钵庙组地层存在微裂缝,易导致钻井液发生漏失等。通过研究分析,确定出了适合塔木察格油田的两性复合离子聚合物防塌钻井液,以及相应的处理措施。现场应用结果表明,该钻井液具有较强的抑制性、低的滤失量和良好的稳定井壁作用,抑制了铜钵庙组地层的井漏;该钻井液流变性好,对井壁能产生清洗,满足了安全快速钻井的需要,降低了钻井生产中的事故和复杂,提高了生产时效,为降低钻井成本及钻井施工创造了良好的井眼环境。Down hole problems,such as shale formation swelling,tight hole,hole instability obstruction during RIH and caving,were encountered in the drilling operation of Tamtsag oilfield in Mongolia.Based on the analysis of formation characteristics,amphoteric polymer anti-caving drilling fluid was chosen to use as solution.Drilling operation showed that borehole instability and circulation loss were eliminated because of the strong inhibition of the drilling fluid.With satisfactory rheology,this mud performed well at well cleaning and elevating efficiency of drilling.

关 键 词：两性离子聚合物钻井液 井眼稳定 防止地层损害 

分 类 号：TE254.3[石油与天然气工程—油气井工程]