Development potential analysis of dense volcanic tuff gas reservoirs

Songnan volcanic gas reservoir is a high efficient development of volcanic gas reservoir.With six years of development,it is still capable of producing 500 million square production capacities.However,with the extension of time in gas reservoir production,advanced edge-bottom water,rapidly rising water-gas ratio,decreased dynamic reserves,the natural gas market in short supply and winter protection for factors such as the widened peak valley,agreat challenge has been brought to the continuous and stable gas reservoir.By analyzing the high CO2 content in YD1 HF well and high fracturing yield of Yaoshen-101 well,combined with the gas reservoir dynamic understanding,the dense volcanic tuff has been described in detail.Through research and comparison of other gas reservoir conditions and development ways,the dense tuff reservoir with horizontal well development should be adopted.By moderately adopting subsection fracturing to increase production capacity,to realize the economic effective use,and maximize the producing rate of reserves,and maintain long-term stable gas field.