摘要
分子沉积(MD)膜驱油技术是依靠MD膜驱剂在油藏体系的各种界面上单分子层静电吸附释放热量,从而提高原油采收率的新型技术。考察了MD 1膜驱剂溶液的电导率、粘度和其在原油中的分配。结果表明,MD 1膜驱剂属表面非活性物质,其水溶液不存在"胶束"状态;MD 1膜驱剂的加入不增加驱替流体的粘度,不改变油 水流度比,膜驱油机理与聚合物驱不同。随着MD 1膜驱剂质量浓度的增加,其相应油 水分配系数明显降低,MD 1膜驱剂质量浓度小于200mg/l时,其相应油 水分配系数随着质量浓度的增加明显降低,而浓度大于200mg/l时,油 水分配系数一般小于0 1;相同条件下,原油中的胶质和沥青质含量越多,MD 1膜驱剂在油、水两相间的分配系数越高。MD 1膜驱剂的油 水分配系数远小于1,说明其在油相中的溶解量很小。
The molecular deposition (MD) filming flooding is a new technique to enhance crude oil recovery based on thermopositive monolayer electrostatic adsorption of MD filming flooding agent on different interface within reservoir system. The conductivity, viscosity and oil-water distribution of MD filming flooding agent MD-1 were studied. The results showed that MD-1 was a surface non-active agent, and no micelles formed in its water solution. Moreover, the viscosity of water didn't increase due to the addition of MD-1, and no changes of its oil-water current ratio was observed. The mechanism of MD filming flooding technology is different from that of polymer flooding. Oil-water partition coefficient (Ko/w) apparently decreased with the increase of the mass concentration of MD filming flooding agent MD-1, while it was less than 0.1 when mass concentration of MD filming flooding agent MD-1 was more than 200 mg/l. The more the content of resins and asphaltenes in the oil phase are, the more oil-water partition coefficient is. Oil-water partition coefficient of MD-1 was far less than 1, which revealed its less solution in oil phase.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2004年第1期1-5,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
中国石油天然气股份公司导向试验基金资助(B9802)
重质油国家重点实验室开放课题(2003 01)
关键词
分子沉积膜驱油技术
MD-1膜驱剂
电导率
粘度
分配系数
Adsorption
Crude petroleum
Deposition
Electric conductivity
Electrostatics
Petroleum reservoirs
Solutions
Surface active agents
Viscosity
