COMPARISON OF CO2 - ECBM BASED ON INJECTION PATTERN

摘要

A pilot test of CBM well was successfully conducted. , Normally, the methane production rate in CBM decreases after it reaches the maximum rate. . To minimize the declining production in a CBM well, we need a secondary recovery to sweep the gas that is left in the matrix. The methane production from a coal beds can be enhanced with an injection either from carbondioxide or nitrogen. The injected CO2 will displace methane and accelerate methane production at sustained or increased pressures. Coal has a capacity to hold considerably more CO2 than methane in the adsorbed state Furthermore, CO2 injection in ECMB can potentially be a CO2 storage in coalseams, and become a promising technology to decrease anthropogenie greenhouse gas emission. In recent days, the simulation technology cannot be separated from oil and gas reservoir development program. Reservoir simulation is a powerful tool to design field development and predict reservoir behavior. In this work we will simulate the ECBM -CO2 based on injection pattern. The correlation between type of injection pattern and the result of injection will be presented on this paper.