摘要
针对高30断块砂岩油藏，筛选和评价了表面活性剂／聚合物（S／P）二元复合驱油体系。结果表明，表面活性剂CDS-1在有效浓度（0．025％～0．300％）低而宽的范围内，体系与原油的界面张力可降到能大幅度提高驱油效率的10^-2mN／m数量级；当疏水缔合聚合物HNT201—3浓度为1250mg／L、CDS-1浓度为0．05％时，体系在地层条件下的表现黏度可达72．37mPa·s。在模拟油层渗透率及非均质变异系数的岩心上，注入0．30PV二元复合体系及0．10Pv聚合物保护段塞时，可比水驱提高采收率20．91％OOIP。
Surfactant/polymer（S/P） systems are screened and evaluated at 90 ℃ in the reservoir of fault block Gao 30 in Huabei oilfield in this paper. The results indicate that the interracial tension between the chemical solution and crude oil could be lowered to the magnitude of 10-2 mN/m of which residual oil saturation could be obviously reduced, as surfactant CDS- 1 active concentration ranged from 0. 025 % to 0. 300 %. Apparent viscosity of the chemical solution could be 72.37 mPa·s if 1 250 mg/L hydrophobically associating polymer HNT201 -3 is added into 0.05 % CDS- 1 connate. Results of core displacement test, whose reservoir permeability and heterogeneous variation coefficient are identical with those of the reservoir, show that the oil recovery could be increased by 20.91% OOIP than water flood when 0.30 PV chemical slug size and 0.10 PV polymer buffer are injected into Dynasty-Parson Cores.
出处
《海洋石油》
CAS
2010年第1期72-75,共4页
Offshore Oil
关键词
S/P复合驱油体系
提高采收率
疏水缔合聚合物
界面张力
surfactant/polymer technology
enhanced oil recovery
hydrophobically associating polymer
interracial tension
