膨化水暂堵剂在海上油田修井中的应用

渤海某油田经过多年注水开发,储层压力高,层间压力差异大,修井作业往往需要较高密度的修井液来平衡地层压力.为减少修井液漏失,保护储层,一般会采取堵漏措施.该油田近年来引进了膨化水暂堵剂,室内研究表明,膨化水暂堵剂与该油田常用压井盐水配伍性较好,堵塞筛管及解堵效果良好.经油田现场实际应用,有较好的暂堵效果.

Application of expanded water temporary plugging agent in workover of offshore oilfield

After many years of waterflooding development in a Bohai oilfield,the reservoir pressure is high and the pressure difference between layers is large.Workover operation often needs high density workover fluid to balance formation pressure.In order to reduce the loss of workover fluid and protect the reservoir,lost circulation measures are usually taken.In recent years,expanded water temporary plugging agent has been introduced into the oilfield.Laboratory research shows that the temporary plugging agent has good compatibility with the well killing brine commonly used in the oilfield,and the plugging screen and plugging removal effect are good.The field application shows that the temporary plugging effect is good.