摘要
针对胜利普通稠油油藏,研究了地层水硬度、矿化度、原油对泡沫剂DHF-1泡沫性能的影响,考察了DHF-1与驱油剂烷基苯磺酸盐表面活性剂WT的配伍性,通过驱替实验比较了不同驱替方式的驱油效果。结果表明,随地层水硬度和矿化度的增加,DHF-1的起泡体积与半衰期逐渐降低。地层水硬度为120 mg/L(CaCl2)时,DHF-1的起泡体积与半衰期分别为155 mL与65 s,泡沫体系界面开始浑浊;地层水矿化度为20 g/L时,DHF-1的起泡体积与半衰期分别为168 mL与43 s,泡沫体系有不溶物产生。随原油加量增加,DHF-1半衰期迅速降低;原油与DHF-1质量比小于0.3时,DHF-1起泡体积变化较小,之后迅速降低。WT对DHF-1的起泡性能无不利影响。随DHF-1加量增加,驱油体系油水界面张力降低,DHF-1与WT质量比为20时的界面张力为0.05013 mN/m。蒸汽-泡沫-驱油剂复合驱最终采收率为72.1%,比蒸汽驱提高14.6%,复合增效效果显著。
The effect of formation water hardness, salinity and oil on foam performance of homemade foam agent （DHF-1） was investigated aiming at heavy oil reservoir in Shengli oilfield. The compatibility of DHF-1 with displacement agent alkylbenzene sulfonate surfactant （WT） was determined. The displacement effects of different displacement mode were compared. Experiment results showed that foaming volume and half-time of DHF-I decreased with increasing hardness and salinity of formation water. When the hardness of formation water was 120 mg/L （CaCI2）, the foaming volume and half-time of DHF-1 was 155 mL and 65 s respectively, and turbidity was seen in the interface of foam system. When the salinity of formation water was 20 g/L, the foaming volume and half-time of DHF-1 was 168 mL and 43 s respectively, and insoluble materials generated in foam system. The half-time of DHF-1 decreased quickly with increasing oil dosage. When the mass ratio of oil to DHF-1 was less than 0.3, the foaming volume of DHF- 1 changed little, and later decreased quickly. Foaming property of DHF- 1 wash＇ t affected by WT. The oil-water interfacial tension of oil displacement system decreased with increasing DHF-1 dosage. When the mass ratio of DHF-1 to WT was 20, the interfacial tension was 0.05013 mN/m. The ultimate recovery of steam-foam-displacement agent combination flooding was 72.1%, which increased by 14.6% comparing with that of steam flooding. The synergy effect was significant.
出处
《油田化学》
CAS
CSCD
北大核心
2014年第1期65-68,共4页
Oilfield Chemistry
基金
国家科技重大专项"胜利油田特高含水期提高采收率技术"(项目编号2011ZX05011)
关键词
稠油油藏
蒸汽驱
泡沫剂
驱油剂
复合驱
胜利油田
heavy oil reservoir
steam flooding
foam agent
displacement agent
combination flooding
Shengli oil fields
