| Gas-well testing is very important in developing of gas field. According to the characters of high temperature and high pressure that was find in western oil-field, a new testing idea was proposed, Namely regard testing each link of the whole course as a system to treat. Regarding testing rational job parameter as main point, studying every security of link, obtaining the purpose of testing safely. According to above-mentioned new testing idea, this text propose that put store layers influent, well pipeline and pipe mechanics etc together and consider wholly as one, regarding the stability of layer wall, coming out sand of layer, destruction of oil tube and casing pipe and the formation of hydrate in well pipe etc as restraint condition of rational work parameter. Setting up rock stress of layers and coupling porous media flow model and new method of solving of porous media flow for the first time in this paper. Have taken the lead in studying of distortion and destruction issue of testing pipe by way of experiment at home. Setting up new mathematics model of distortion and destruction of testing pipe, further investigating the influence of fluid flow in the testing pipe and distortion and destruction of testing pipe and the formation of hydrate etc. Making result of study into computer application program and succeed in application for design of pengcan-2 well, kela-203 well and xi-5 well etc. This indicates that research approach in this paper has not merely achieved success in theory, and has obtained great success in application.
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