The Percolation Establish For Wedge Complex Gas Reservoir And Study On Well Test Interpretation

Into the 21st century, the natural gas industries have grown fast and much gas reservoir has exploited already. Well test analysis is not only an important way but also an indispensible technique, when Oil & Gas Reservoirs are described. At the moment, analysis technique has been got a new level. On gas well testing and well models, a lot of productions have been researched. Because of the varying of stimulation, the heterogeneous characteristics of reservoir and the changing of exploitation manner, the more complex models of gas reservoir are appearing.Based on the problem of percolation for complex gas reservoir and the theoretical of well test models, in accordance with the change of fluid properties in the complex gas reservoir ,this thesis pose the wedge-shaped complex gas reservoir to simulate the tilt when the fluid or geological has changed . In theory, that can close to the real gas reservoir geology.The percolation has turned to be boundary condition in Laplace Space. Firstly, the pseudo-pressure solution both inside and outside the two districts of this complex gas reservoir has been attained in Laplace Space. Then by making use of numerical inversion, the pseudo-pressure solution has been obtained in real space. Lastly, a set of typical curves of two-region composite reservoir have been constructed with a tilt angle, which is bases for well test analysis.At present, the problem of the application for the complex gas reservoir with a tilt angle has not been solved. In this paper, the method of well test analysis with a tilt angle is established. The plate of curves are applied in analysis program that be developed. The program can analysis observed data, then permeability, skin effect at the wellbore and wellbore storage coefficients are calculated. The parameters are validated and dynamic basis is offered to the exploitation.