摘要
研制出了具有保护储层效果的无固相压井液,其基液配方为0.5％LG-1+0.4％LG-2+1％小阳离子+0.1％其它。此外还研究开发出了无机盐增溶剂LG-3,加入LG-3可加宽低成本无机盐的使用范围,很大程度地降低压井液配液成本和单井综合成本。该压井液密度在1.0-2.5 g/cm3之间可调,具有无固相、滤失量低、抑制性强等特点,抗温能力在120℃左右。室内性能评价结果表明,无固相压井液对高渗储层岩心的渗透率损害率平均为4.0％,对低渗储层岩心的渗透率损害率平均为2.9％,说明该体系对储层具有很好的保护效果。
The base fluid of solids free well control fluid is composed of 0. 5%LG-1+0. 4%LG-2 + 1% micro-cation+0. 1% other materials. A kind of non-organic solution enhancing agent LG-3 is also developed, which can widen the application range of low cost inorganic salt, and lower the batching cost and composite cost of single well dramatically. The density of the fracturing fluid is adjustable between 1. 0 to 2. 5 g/cm3, and it has such features as solids free, low filtration and strong inhibition, etc. , and the temperature tolerance is about 120℃. Laboratory evaluation shows that its average permeability damage rate for high permeable formation core is 4. 0%, and 2. 9% for the low permeable formation core, which shows the good formation protecting results of this system.
出处
《钻井液与完井液》
CAS
北大核心
2002年第4期15-17,共3页
Drilling Fluid & Completion Fluid
