关键词: 四川盆地, 须二段气藏, 含水凝析气藏, 测井二次解释, 一井一策

Abstract:  Gas exploration in tight sandstone of the 2nd Member of Anyue Xujiahe formation, Sichuan Basin, has been fruitful. However, through systematic review and analysis of the geological data, historical production data of single well, pressure analysis data and the effect of dewatering gas production, it is found that during the middle and later stages of the development of gas reservoir,the gas field is affected by severe water invasion, liquid accumulation in the oil pipe, contamination of the reverse condensate oil,and poor water control effect etc. , resulting in rapid production decline of gas field, the productivity of single well decreases,the number of intermittent wells and shut-down wells has been increased, and the overall development effect has become worse. According to these problems,countermeasures for potential productivity exploitation has been proposed. Studying the law of water-flooded and determining the pattern of water invasion;Logging secondary interpretation, making clear the mode of occurrence and finding out the potential between layers;Executing “one strategy for one well”, determining the influencing factors, putting forward the feasible implementation process and realizing efficient development of hard-to-get reserves in this formation. 

Key words: Sichuan Basin, 2nd Member of Xujiahe formation, condensate gas reservoir with water, log secondary interpretation, one strategy for one well