| This paper starts with the changes of three main factors that influences the flow in porous media, that is, fluid(components of fluid and its chemi-physical characteristics), porous media(pore structure and its chemi-physical characteristics ),flow conditions(the flow environment, conditions and inter-action between the rock and fluid ),the chemi-physical characteristics of porous media and fluid, the flow characteristics of FuYang(abbrev , for Fuyu and yangdachengzi)formation in Daqing outside fields are studied by laboratory experiments. On the basis of laboratory experiments and completely summing up the previous research results, and make a further research on mechanism of FuYang formation, the mathematical model describing the flow of FuYang formation are established, the mathematical models are solved by analytical and numerical methods, the stable and unstable flow behavior of FuYang formation are analyzed. The following researches have been completed:1. Choosing three kinds of core samples, which permeability are >5 10-3 m2, 1-5 10-3 m2, <1 10-3 m2 respectively, the experiments describing the flow of single-phase oil andwater fluid are conducted, the flow curve of flow velocity vs pressure gradient is drawn. The core flow experiments show that flow in FuYang formation has non-linear behavior with a less threshold pressure gradient, with the increasing of gradient to some extent, the flow becomes a linear flow. The relation between permeability and threshold pressure gradient is studied by flow experiments, the capillary pressure curve in core samples is measured, the distribution of pore size and structural characteristics are analyzed. Mercury injection experiments show that pore system of FuYang formation is mainly consisted of smaller pore and narrow throat, the porosity and permeability is low, and the flow resistance is great.2. The flow experiments of water and microbe solution in above core samples have been conducted, the relative permeability curves were drawn respectively, the characteristics of relative permeability curves and non-Darcy flow of water and oil two phase are analyzed. The experiments show that microbe solution flooding can decrease the threshold pressure gradient, lessen the flow resistance, and extend the effective drainage distance.3. The rheology experiments were made using oil of Chaoyanggou oilfield, the consistence and effective viscosity verse shear stress were plotted. The experiments results show oil with high paraffin and colloidal- matter content exhibits characteristics of structural mechanics, the oil is a non-Newtonian fluid that can become a jelling structure easily, which increase flow resistance.4. According to results from laboratory experiments, the FuYang formation exhibits characteristics of deformed porous media, in which porosity and permeability changes with pressure. The stable flow in elastic deformation media is studied, the well test interpretation model of elastic deformed media reservoir considering threshold pressure gradient and plastic deformed media reservoir are established originally. 5. According to low-velocity flow curves attained from laboratory experiments, the non-linear flow characteristics were analyzed, which shows that non-linear flow is identical tonon-Newtonian fluid flow. The non-linear stable flow considering threshold pressure gradient is studied. The transient flow well test interpretation model of non-linear flow considering threshold pressure gradient for single and double media, the transient flow well test interpretation model of composite renservoir comprised by linear flow and non-linear flow considering threshold pressure gradient are established originally.6. The Finite Element Method for numerical solution of the above well test interpretation models are studied, the pressure transient mathematical models are solved using FEM, and the pressure transient behaviors are analyzed. Some well test case from Daqing outside field are analyzed , the better results are attained.The above research results w...
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