Identification and evaluation of Xushen volcanic gas reservoirs in Daqing

Geological reserves in the Xushen gas field have accumulated hundred billions of cubic meters,of which 89.8% is from volcanic reservoir.It is the bottleneck-difficulty of exactly describing volcanic reservoir that always restricts the exploration and exploitation of deep gas.Daqing Oilfield organized scientists and technicians of different levels to tackle the hard-nut problems during the period of Tenth Five-Year Plan.The article discusses a set of research techniques applicable to volcanic gas pool,including lithology identification and description,lithofacies identification and description, volcanics identification,reservoir space description,and comprehensive reservoir evaluation.The practical application of these technologies in the Xushen gas field is expounded.