石油化工2024，Vol.53Issue(4)：553-558,6.DOI:10.3969/j.issn.1000-8144.2024.04.011
低渗透油藏微纳米乳液增注技术实验研究
Experimental study on micro-nano emulsion augmented injection technology in low permeability reservoir
摘要
Abstract
Based on the good prospect of nano-materials for pressure reduction and injection of low-permeability reservoirs,a micro-nano emulsion used as injection enhancer was studied.The basic performance evaluation and injection parameter optimization of the micro-nano emulsion were carried out by using nano meter analyzer,contact angle meter,core displacement device,etc.The experimental results show that the micro-nano emulsion has a small particle size,certain adsorption and wettability-changing ability,which can change the wettability of the rock surface from strong water wetting to weak water wetting.It has good temperature resistance,anti-swelling performance,compatibility,and when the injection concentration is 0.5%(w),the oil-water surface tension can be reduced to a minimum of 0.60 mN/m.When the optimized process parameters are a single section of the plug stewing wells,injection concentration 0.3%(w),and injection flow 0.1 mL/min,the injection pressure is reduced by 16.87%.Based on the indoor research,6 wells were tested in the field,and the average injection pressure decreased by 1.8 MPa,the daily injection volume was increased by 35 m3,which lasted for 362 d,and provide theoretical basis for decompression and augmented injection with nano emulsion in low permeability reservoirs.关键词
微纳米乳液/超低渗/注入参数优化/降压增注/注水开发Key words
micro-nano emulsion/ultra-low permeability/injection parameter optimization/decompression and augmented injection/water injection development分类
能源科技引用本文复制引用
兰爽,张顶学,王勇,杨昊东..低渗透油藏微纳米乳液增注技术实验研究[J].石油化工,2024,53(4):553-558,6.基金项目
国家科技重大专项"采出井全生命周期举升工艺及配套技术研究"(2016ZX05056004-002). （2016ZX05056004-002）
