生物表面活性剂稀体系微观模拟驱油

MICRO-SIMULATION TEST OF A DILUTE BIOSURFACTANT-SYSTEM USED IN EOR

从渗流化学的角度，剖析了低界面张力生物表面活性剂稀体系的微规模拟实验结果，提出了该体系在孔隙介质特定的条件下，对残余油的作用实质上是活性分子向低界面自由能方向的聚结力、毛管力和驱动力相结合的作用。这些作用力统称为渗流化学力。在孔隙介质中，渗流化学力使油／水两相界面产生了微观的“流线型”、微观“指进型”、“弯月形”以及“片状脱落形”等界面结构，这些微观界面结构集中地反映了孔隙胶束、增溶、乳化和互溶等微观机理及微孔道渗流机理。

This paper presents a micro-simulation test with the dilute -biosurfactant system in a transparent glass simulator.The results of micro-simulation tests of a-system with low inter-facial tension are onalyzed with a point of view of the fluid flow chemistry in porous media.The reaction of the system with residual oil can be considered as the combined action of ag-gregative force of activated molecule toward low interfacial energy,capillary force and driv-ing force. The forces cause a series of interfacial structures are “micro-streamline”,“micro-fingering”,“micro-meniscus”and“micro-flake-off”on oil/water interface in porous media.They reflect the micromechanism of porosity micella, solubilization,emulsification and solu-bility as well as mechanism of fluid flow in pores..