| As China's gas reservoir exploration and development is more and more widely,the exploitation of gas reservoir model is more and more attention.Gas reservoirs often contain a variety of gas types,how to exploitation with a variety of gas at the same time is the key to gas reservoir exploitation.According to the characteristics of the gas reservoir types of gases coexist,this paper studies the feasibility of commingled production with coalbed methane,shale gas and tight gas.Based on the characteristics of the reservoir and the combined horizons,this paper analyzes the feasibility of the commingling in the region.By establishing the numerical simulation model of the ideal reservoir,this paper is evaluated the influence of commingling with coalbed methane,shale gas and tight gas by study the formation pressure,reservoir property,gas and water relative permeability.on this basis,evaluation the effect of commingling with coalbed methane,shale gas and tight gas,then find out the optimization method of commingling area combination,Commingled order and single well commingled production proration parameters.In this paper,the model of multi-generation has been established,which fit the target zone's multiple produced layer of unconventional gas reservoir,and the sensitivity of the mining is analyzed,which provided support of the model suspension and prerequisite conditions of the optimization of.Forming a set of coalbed methane,shale gas,tight gas commingled parameters optimization method,serve as a reference for similar gas reservoir commingled production.The results show that the coal seamshale layer-dense layer commingling with superposition has the best recovery efficiency,followed by coal seam-dense layer-shale layer superposition relationship,and dense layer-coal seam-shale layer superposition effect is relatively poor.Optimum of commingled production order is commingling with perforated seam,dense layer,shale layer at the same time. |
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