Research on Inflow Performance Relationship of Coalbed Methane Extraction
|School||China University of Petroleum|
|Course||Oil and Gas Field Development Project|
|Keywords||CBM Percolation mechanism Numerical Simulation Inflow Typical curve|
Based on extensive literature research and analysis compares the current foreign key dynamic model of coalbed methane reservoir porosity and permeability ; detailed summary of coalbed methane reservoirs and conventional gas reservoirs in the geological origin and mechanism of reservoir and exploitation of differences ; surface for methane from the coal matrix to the output shaft experienced desorption , diffusion and percolation of these three complex flow processes , selection Shi and Durucan established coalbed methane reservoir porosity and permeability dynamics model - SD model , the establishment of three-dimensional , dual porosity , unbalanced intended steady state , considering the effect of matrix shrinkage , gas-water two-phase fluid flow mathematical model of CBM ; using fully implicit methods, and the use of Matlab language of the source code , the values ??obtained for the discrete model is solved ; through the Qinshui Basin well Fanzhuang Block FZ318 develop dynamic simulation , and the computational results are compared with field data to verify the reliability of the model . At the same time , according to the actual geological conditions Qinshui basin , select a set of benchmarks , to establish a conceptual model of coal reservoir , the use of the preparation of a good CBM reservoir numerical simulation program , drawn early mining CBM wells inflow (IPR) curve , and analysis of the various parameters on the IPR curve. Finally, a single well prepared coalbed methane reservoir simulation program to try to develop a set that reflects the unique occurrence transport mechanism CBM CBM exploitation typical curve to simulate the production of coalbed methane reservoir dynamics , provides for the development of coalbed methane a simple and effective tool.