摘要
在大庆油田油层及流体性质 (原油、水、45℃温度 )条件下 ,研究了碱 /表面活性剂 /缔合聚合物三元复合体系 (ASP)的物理化学性质并进行了驱油效果评价。结果表明 ,缔合聚合物具有良好的耐盐 (碱 )性 ,在相同粘度 (例如 40mPa.s)下 ,用量比部份聚丙烯酰胺三元复合体系的低 5 0 %～ 70 % ;体系具有良好的抗剪切性 ,在 75d内体系稳定 ,无相分离和沉淀 ;缔合聚合物对ASP体系与大庆原油界面张力无明显影响 ;与部份水解聚丙烯酰胺聚合物相比 ,缔合聚合物ASP体系表面活性剂在大庆油砂上的静态吸附量较低 ,但对NaOH的静态吸附量无影响 ;岩心驱替试验结果表明 ,可比水驱提高采收率 2 0 %OOIP以上 ,因而具有广阔的应用前景。
In this study, both solution phases or characteristics of combination of alkaline/surfactant/water soluble associative polymer and core flooding tests were investigated for Daqing Enhanced Oil Recovery (EOR) at reservoir conditions, such as temperature, crude oil, brine and core. Results show concentration of associative polymer, which were thought to be used in EOR economically , is only 700～900 mg/L while HPAM, manufactured in Daqing, it is 2200～2500 mg/L in Daqing asp system (1.2%NaOH+0.3% Surfactant ). If its viscosity is 40 MPa·s, It effects little on interfacial tension between the system and Daqing degassed crude oil, and tolerance of alkalinity, shear degradation and long period stability are favorable for Daqing EOR. Oil displacement over water flooding is more 20%OOIP (Original Oil In Place) when 769 or 700?mg/L of associative polymer is solubilized in alkali surfactant brine.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
2001年第4期85-89,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
:"九五"中国石油天然气集团股份有限责任公司重点科技攻关项目
关键词
三次采油
三元复合体
缔合聚合物
驱油效果
大庆油田
ASP
采收率
enhanced oil recovery
ASP technology
hydrophobically associating water soluble polymer
oil displacement evaluation
