To a great extent, experiment selection of temporary plugging particles(TPP) in the temporary plugging techniques (TPT) is blind at present. Based on the investigation of particle migration, deposition and plugging mechanism in the porous media, network model, the inter-connected pore and throat network on the basis of reservoir pore structure, is applied to the optimization of TPP in the TPT. It is shown that the result of simulation has a good agreement with that of core fiooding experiment and can be used to guide the study of core flooding experiments. The main advantages of this method are:the model can be repeatedly used many times and can be used in the simulations of various purposes and aspects;the results are highly comparable by the simulation while much less by the core flooding experiments. Introduction It's well known that formation damage existing extensively in each phase of field operations is a difficult problem in the petroleum industry, and can not only damage oil and gas resources and considerably reduce the productivity of hydrocarbon reservoirs, but also even kill hydrocarbon reservoirs, and therefore cause a very great waste of manpower, material and financial resources. During the past several decades, beginning with our original consciousness of formation damage problem, unremitting efforts and a great number of researches have been made from the understanding of formation damage mechanism in the past to the controlling and preventing of formation damage by using various methods at present.

To a great extent, experiment selection of temporary plugging partic1es(TPP) in the temporary plugging techniques (TPT) is blind at present. Based on the investigation of particle migration, deposition and plugging mechanism in the porous media, network model, the inter-connected pore and throat network on the basis of reservoir pore structure, is applied to the optimization of TPP in the TPT. It is shown that the result of simulation has a g(x)d agreement with that of core flooding experiment and can be used to guide the study of core fl{x)Jing experiments. The main advantages of this method arc: 1. the model can be repeatedly used many times and can be used in the simulations of various purposes and aspects; 2. the results are highly comparable by the simulation while much less by the core flooding experiments_