Study On Volcanic Gas Reservoir In Songnan Development Characteristics

In recent years,as the global energy has consumed,oil and gas resources have reduced,some unconventional reservoirs have gradually received.The volcanic gas reservoir is one of them.Although recoverable features of volcanic gas reservoir is more obvious,compared with conventional gas reservoirs,it has many special features,there are many difficulties in the process of exploration and development.Therefore,this paper study on volcanic gas reservoir in songnan development characteristics.Volcanic gas reservoir in songnan has strong heterogeneity,gas and water system complexity,lithology and lithofacies complex.It has eruption periods,the volcanic apparatus controlled volcanic gas reservoir,high carbon dioxide content.In this paper,as the geological characteristics of volcanic gas reservoirs,conventional methods is served in volcanic gas reservoirs,but is recommended when CO₂ more than 25%,gas reservoirs need to consider their impact on the viscosity and compression factor.Analysis of factors has found:volcanic gas reservoir in songnan being configured to control severe;horizontal well is better than vertical well,water invasion will lead to productivity degraded.Remaining reserve is 128.7×10⁸m³.Through the analysis of various types of gas wells producing water situation and the type of driving,taking into account the effects of water intrusion,the use of gas quotas,fixed oil,water,gas ratio set for the system to wells.Consider the affects on gas reservoirs with edge and bottom water,optimize gas production rate:YS1 gas production rate controlled at about 3.5%,YP7 gas production rate controlled at about 2.5%.On the basis of geological research and development characteristics,deployment adjust 2 horizontal wells（YP12,YP13）.Through research,analyzes the main factors of gas reservoirs.This study on volcanic gas reservoir in songnan development characteristics,has some reference significances all over the world.