有机盐强抑制可降解钻(完)井液在胜利油田的应用

Application of Degradable Organic Salt Drilling Fluid with Strong Inhibition and Completion Fluid in Shengli Oilfield

胜利油田低渗油藏储量丰富,目前多采用水平井开发方式,但常规钻井液往往会对储集层造成伤害,降低油气井产量。因此,有必要选择一种适合的钻井液体系。对有机盐强抑制可降解钻、完井液技术进行了筛选,并在胜利油田多个区块进行了现场应用,取得了较为理想的效果,有机盐强抑制可降解钻、完井液体系对胜利油田低渗储集层有较好的保护作用,能显著提高油气产量,提高勘探开发效益。

Shengli oilfield is rich in oil reserves of low permeability reservoirs, and developed mainly by horizontal drilling process at pres- ent with conventional drilling fluid. But the reservoir damages are often found by the drilling fluid for drawdown of production in the oil and gas wells. So it is necessary to optimiZe the drilling fluid system. In this paper, the degradable organic salt drilling fluid with strong inhibi- tion and completion fluid is studied and applied to many blocks in Shengli oilfield, and good effects have been obtained. The case study in- dicates that such drilling and completion fluids are good at protection of the low permeability reservoir, obvious increase of oil and gas pro- duction and improvement of exploration and development benefits in this oilfield.