Study On Forecasting The Coalbed Gas Storage And Transport Law And Resources Prediction In Fuxin Basin

Regarded the coalbed gas as a kind of resource to utilize can not merely improve safe production level of coal mines, and maked non-renewable mineral resources fully utilized, by that offers a kind of clean, high-quality energy for development of national economy, and it also has the signification for alleviating the energy short supply state that our country faces at present.FUXIN mining area is one of the coal production bases in our country, it has long history that the coal is exploited. At present, coal resource in shallow mining area will be exhausted, and must exploite the deep area. Most of them is the more-gas coal mines.Rational appraisal and forecast produce of coalbed gas the to FUXIN basin, it is that the industrial enterprise of FUXIN revitalizes and urgent demand for development of midium or long term of regional economy.The coalbed gas well materials and field experiment materials in FUXIN basin are studied carefully.Parameters standards of coalbed gas stores layers are analysed, and at the same time the adopting parameter evaluation index system in FUXIN basin is set up.On the basis of analysing and researching the coalbed gas storage and transport mechanism, the coalbed gas storage and transport dynamic model is set up ,so does the numerical model .By the models ,exploition output is predicted and analysed coalbed gas in the FUXIN basin.The research contents include the following several respects mainly:(1)According to coalbed gas resource in FUXIN basin, the storage and transport mechanism for the coalbed gas reservoir state and diffuseness and seepage and so on are analysed and experimentally investigated, by this the theoretical basis is established for the coalbed gas seepage mathematic model(2)The pore-fissure double media model and the coalbed gas seepage mathematic model in this media, which describe the storage and transport mechanism for the coalbed gas, are fully established, including desorption and diffusion model, the coalbed gas seepage mathematic model, the disposal for coalbed gas special parameters and its determinative conditions and so on.(3)The finite difference method is used to solve the the coalbed gas seepage mathematic model ,and the coalbed gas numerical model is established using implicit differential method for the stability of numerical solution.(4) The numerical simulation method of coalbed gas is established and use it to simulate the coalbed gas storage and transport and throughput capacity sensibility I nFUXIN basin.(5)According this evaluation parameters standard and parameter evaluation system of coalbed gas recoverability, used fuzzy mathematics assessment method ,the coalbed gas resource in 5 mining areas of FUXIN basin is evaluated.