高密度低腐蚀无固相压井液研究与应用  

Study and Application on High Weight Low Corrosion and Clay-free Kill Fluid

作　　者：杨小平[1] 郭元庆[1] 樊松林[1] 董军[1] 尤秋彦[1] 

机构地区：[1]大港油田钻采工艺研究院

出　　处：《钻井液与完井液》2010年第5期51-54,共4页Drilling Fluid & Completion Fluid

摘　　要：大港油田在近阶段的勘探开发过程中,深井、高温高压井不断增多,急需保护油层的高密度压井液,以解决施工安全、储层污染、管柱腐蚀等问题。室内优化研究了高密度无固相甲酸盐压井液配方,其密度最高达1.70g/cm^3,通过使2种甲酸盐的复配比例达到最优,可最大限度地降低压井液成本。对缓蚀剂进行了优选,添加了适宜缓蚀剂的压井液,在180℃高温下的腐蚀率小于0.02 mm/a。同时进行了再利用技术研究,优化了回收工艺并配套了回收设备。经过2口井的试验应用,该压井液的施工成功率为100%。A high weight low corrosion and clay-free kill fluid was developed in laboratory for reservoirs protection and pipe string corrosion of HTHP wells in Dagang oilfield.The formula and the reutilization technology of the kill fluid were optimized and the highest density reaches to 1.70 g/cm^3 with two sorts of formate,which can cut the cost as low as possible.Using the optimized anti-corrosive agent,the corrosion rate is not more than 0.02 mm/a in 180℃. The application of this product in two wells was very successful.

关 键 词：高密度压井液 无固相压井液 甲酸盐 高温高压井 钻井液配方 腐蚀率 再利用 

分 类 号：TE254.3[石油与天然气工程—油气井工程]