| The most of natural gas reservoirs discovered in our country are middle or low permeability gas reservoirs. The low or extra low permeability gas reservoirs take up the considerable proportion ,they can supply a large amount of resourse.The percolation mechanism and development characteristic in low-permeability gas reservoir are different from the normal gas reservoirs,they have their' s own characteristic.Knowing and evaluating exactly and developing in reason the low-permeability gas reservoir are the key problem that will be solved urgently. It has the most important realism meaning to efficiently develop the low-permeability gas reservoirs in our country.In this paper, the impact in low permeability of Sulige' s gas reservoirs development are studied for the practical problems that occurred during the development of reservoirs, which are accomplished on the base of predecessors' work. The main research results are gotten as follows:1, In order to know the low permeability of Sulige' s gas reservoirs deeply, resevoirsenvironment of Sulige' s gas field are studied carefully.2,Based on the result of stress sensitivity experiments of low-permeability sand gas reservoir, we found the low permeability of Sulige' s gas reservoirs taking on stronger stress sensitivity.3,Through experiment ,we found when the water saturation increasd near to the irreducible water saturation, percolation ability greatly depress because of existent water,and when the water saturation increasd exceed to the irreducible water saturation,after the gas overcome pressure ,they can start seep. here behaved start-up pressure gradient within gas permeability.4,An two-phase fluid flow mathematical model is founded based on the slippage effect of low permeability gas reservoir through experiment and analyse .We have analyzed the correction coefficient influenced on deliverability.,the permeability affected thedynamic supply radius,the saturation affected supply radius.
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