疏水缔合聚合物与表面活性剂之间同时存在静电吸引和疏水缔合作用时，体系组成和应用环境因素的改变可以使体系的流变性能在几个数量级范围内发生变化，同时可以显著影响固/液界面吸附层的微观结构，从而提供了在化学驱过程中利用二者的协同效应在特定区域和较大幅度范围内调控驱替液流度的可能性。本项目将采用项目组长期研究、已经实现工业化的疏水改性聚丙烯酰胺（HMPAM）与不同分子结构的表面活性剂构成的二元复合体系作为研究对象，系统地研究聚合物和表面活性剂的分子结构、温度、电解质类型对于二元复合体系流变性的影响规律及其微观机理，确定流变性调控的主要技术手段和可调控范围；进一步研究聚/表/固三者相互作用对体相流变性和固/液界面吸附行为的影响规律，建立在多孔介质渗流条件下调控二元复合驱体系流度的新机制，形成具有显著成本优势、更高驱油效率且适用油藏条件更广泛的新型复合驱技术的基本设计思路，并验证其可行性。

When electrostatic attraction and hydrophobic association simultaneously exist in the system of hydrophobically associating polymer and surfactant, The rheological properties of the system could be varied within a few of magnitude and at the same time the microstructure of adsorption layer at solid/liquid interface can be altered significantly by changing the factors of compositions and application environments of the system, such as temperature and water salinity. This provides the possibility of regulating mobility of polymer/surfactant system in a particular area of reservior and a large range using synergism between solid/liquid interface adsorption and intermolecular interaction and related application process duiring chemical flooding also could be redesigned. The project intends to adopt hydrophobically modified polyacrylamide (HMPAM) ,which has been studied in long-term and has been achieved industrialization in our team, as a representative of hydrophobically associating polymers component. In order to find out the the main control techniques and ranges of the rheological property of the polymer/surfactant system ,we will systematically study the molecular structure of the polymer and surfactant,temperature and electrolyte type for the influence of the rheological property and the microscopic mechanism of the system. Further, the influence of interaction of polymer/surfactant/mineral on the rheological properties of bulk phase and adsorpation behavior at solid/liquid interface will be studied and the new mechanism of regulating mobility based on synergism between solid/liquid interface adsorption and intermolecular interaction will be established. Finally, the design principles of new combination flooding will be proposed and tested by taking full advantage of the favorable factors of the reservior conditions during chemical flooding,such as dynamic adsorption and formation water salinity. This new combination flooding technology should have a lower cost, higher displacement efficiency and could be used in more reservoirs.