CAJ | 학술논문

针对高温高矿化度地层堵水需求，研制了一种耐高温高矿化度的以阴离子聚丙烯酰胺为主剂的冻胶型堵剂，交联剂采用水溶性聚合物聚乙烯亚胺（PEI），并加入保护剂减缓高温下主剂的水解。实验考察了主剂质量分数、主剂分子量、PEI质量分数、PEI分子量、矿化度和pH值等因素对PEI冻胶成胶性能的影响。实验结果表明：随着主剂和PEI相对分子质量增加，主剂和PEI质量分数的增加，成胶时间缩短，但交联剂质量分数过高易发生过交联现象，造成冻胶过早脱水；成胶时间随着pH值的增加而缩短，随矿化度的增加而变长。在110℃条件下，对于NaCl含量为50000 mg/L的地层水，该冻胶强度高，耐温性好，封堵效果好且至少120 d不脱水。堵剂体系最佳配方为：0.6%~0.8%阴离子聚丙烯酰胺+0.3%~0.7%PEI+0.8%~1%高温保护剂。
침대고온고광화도지층도수수구，연제료일충내고온고광화도적이음리자취병희선알위주제적동효형도제，교련제채용수용성취합물취을희아알（PEI），병가입보호제감완고온하주제적수해。실험고찰료주제질량분수、주제분자량、PEI질량분수、PEI분자량、광화도화pH치등인소대PEI동효성효성능적영향。실험결과표명：수착주제화PEI상대분자질량증가，주제화PEI질량분수적증가，성효시간축단，단교련제질량분수과고역발생과교련현상，조성동효과조탈수；성효시간수착pH치적증가이축단，수광화도적증가이변장。재110℃조건하，대우NaCl함량위50000 mg/L적지층수，해동효강도고，내온성호，봉도효과호차지소120 d불탈수。도제체계최가배방위：0.6%~0.8%음리자취병희선알+0.3%~0.7%PEI+0.8%~1%고온보호제。
A gel type shutoff agent with anionic polyacrylamide as a main agent required for high temperature and high salinity formation water shutoff was developed using a crosslinking agent of water soluble polymer-polyethylenimine (PEI), and protective agent was added to slow down hydrolysis of the main agent under high temperature. The impact of main agent mass fraction, main agent molecular weight, PEI mass fraction, PEI molecular weight, salinity and pH was experimentally investigated on gelling performance of PEI gel. Experimental results show that the relative molecular weights of main agent and PEI increase as the mass fraction of main agent and PEI increases while the gelation time is shortened. But under high mass fraction, excessive crosslinking is more likely to occur, causing premature gel dehydration. The gelation time is shortened with the increase of pH values, and becomes longer with the increase of salinity. At 110℃, for formation water with NaCl content of 50 000 mg / L, the gel shows high strength and good resistance to temperature and good blocking effectiveness, and remains hydrated for at least 120 days. The optimum formula for water shutoff system is 0.6% to 0.8% anionic polyacrylamide & 0.3% to 0.7% PEI & 0.8% to 1% high temperature protective agent.