低界面张力抗温抗盐YUDP型起泡剂性能评价

Performance Evaluation of Low Interfacial Tension Temperature and Salt Resistant YUDP Foaming Agent

摘要:

针对吉林油田低渗高温高盐的特点，开发出适合该类型油藏耐温耐盐型起泡剂-YUDP。考察了起泡剂浓度、溶液矿化度、温度、pH、钙镁离子总含量、残余油饱和度对起泡剂起泡能力、稳泡能力以及油水界面张力的影响；结果表明YUDP耐温达75℃，耐盐达31037.9mg/L，耐碱度pH=10，耐钙镁离子达离子含量60mg/L，耐残余油达原油含量15%。实验表明YUDP在高温高盐的环境下依然能将油水界面张力保持在0.01mN/m数量级，达到低界面张力驱油的要求。在YUDP质量浓度为0.4%时，起泡体积达250mL、半衰期达25.7min、泡沫强度达4818.75mL.min、油水界面张力为0.0261mN/m达到吉林油田低界面张力泡沫驱的要求。

Abstract:

Aiming at the characteristics of low-permeability high-temperature and high-salt in Jilin Oilfield, a temperature- and salt-tolerant foaming agent-YUDP suitable for this type of reservoir was developed. The effects of foaming agent concentration, solution mineralization degree, temperature, pH, total content of calcium and magnesium ions, residual oil saturation on the foaming ability of foaming agent, foam stability and oil-water interfacial tension were investigated. The results showed that YUDP was resistant to temperature. 75℃, salt tolerance of 31037.9mg / L, alkali resistance pH = 10, calcium and magnesium ions up to 60mg / L, resistant to residual oil up to 15% crude oil content. Experiments show that YUDP can maintain the oil-water interfacial tension in the order of ?10-2mN/m in the high temperature and high salt environment, achieving the requirement of low interfacial tension flooding. When the mass concentration of YUDP is 0.4%, the foaming volume is up to 250mL, the half-life is 25.7min, the foam strength is 4187.75mL.min, and the oil-water interfacial tension is 0.0261 mN/m to meet the requirements of low interfacial tension foam flooding in Jilin Oilfield.