MD-1膜驱剂溶液的性质

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／1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／1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。

PROPERTIES OF MOLECULAR DEPOSITION FILMING FLOODING AGENT MD-1 SOLUTION

The molecular deposition(MD) filming flooding is a new technique to enhance crude oil recovery based on themopositive 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 (K_(O/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,the more oil-water partition coefficient.Oil-water partition coefficient of MD-1 was far less than 1,which revealed its less solution in oil phase.