泥饼可液化处理的UltraFLO钻井完井液

在分析传统无固相钻井完井液体系利弊的基础上,研制出了全部材料可液化的无黏土相钻井完井液体系——Ultra FLO钻井完井液。该体系在配合简易隐形酸完井液完井时能够将泥饼全部液化,并且该体系抗温140℃;具有较好的抑制性、润滑性、抗污染性(15%钻屑);具有较好的储层保护效果,即使在直接返排的情况下,其渗透率恢复值也能够达到89%,在经过简易隐形酸完井液完井后,渗透率恢复值提高到了96%,这说明简易隐形酸能够进一步解除伤害,保护储层。室内研究和现场实践证明,Ultra FLO钻井完井液体系简化了施工工艺,节省作业时间,具有较好的储层保护效果,现场应用3口井产量均超预期,应用效果较好。

UltraFLO Drill-in Fluid

A new clay-free drill-in fluid, UltraFLO was developed based on the analyses of the advantages and disadvantages of conventional drill-in fluids. UltraFLO has components that are all liquefiable. When used with simple latent acids in well completion, all mud cakes can be made liquid. UltraFLO remains stable at temperatures as high as 140 ℃, and can tolerate drill cutting contamination to 15%. Permeability recovery of cores contaminated by UltraFLO drill-in fluid reaches 89%, and 96% after treatment of the cores with latent acids. Filed application of UltraFLO shows that this drill-in fluid has good inhibitive capacity and lubricity, and is easy to use. Three wells drilled with UltraFLO drill-in fluid had production rates beating estimates.