The rational proration is the prerequisite condition of realizing the high gas production and steady production of gas reservoir. Especially to the tight gas reservoir, due to the very low permeability, there are many low yield and low pressure gas wells. Because low yield and low pressure, the gas well is easily effected by the liquid loading and the change of working system, which cause the degree of reserve recovery decrease, more seriously make the gas stop producing directly. Based on the seepage rule in tight gas reservoir and analyzing the every factors influencing the production of low yield and pressure gas well, the low yield and pressure gas well have been classified to several types. And the gas well yields of different type have been optimized.
Up-Going Drainhole Drilling for Reducing Liquid-Loading of Wells in Tight Gas Reservoir
