The Dynamic Analysis And Production Prediction Of Shale Gas

The horizontal well and multi-stage fractured technics lead a bright way of the shale gas commercial development for North America.This may meet an resonance all over the world.As one of the alternative energy sources,shale gas has a wide distribution in our country,especially in the south place.After several years of exploration,engineers make breakthroughs in geological matters and field process technics.Nevertheless,the development mode of the shale gas is ill-defined.In other words,it is much more important to acquire the dynamic analysis method of the shale gas well.With ultra-low porosity,permeability and volume fractured characteristics,yielding a multi-scale feature.Base on huge quantities of summarisation,composite model is build-up for shale gas dynamic analysis.The ground works of the paper are as follows:(1)Integrating the Langmuir adsorption,Fick diffusion and Darcy low into the composite shale gas seepage model.(2)The pseudo-steady and unsteady state complex mathematical models couple with band reallocation are established.And the unsteady state model is more appropriate for shale gas well.(3)Application of the Laplace transformation and stehfest inversion help making the none dimensional type curves and parameters analysis.The model validation from two aspects are in the paper.(4)The dimension type cure is used to predicting the production coupling with the pre-diagnostic method for raw data of the typical well which has short production time.