Analysis On Dynamic Performance And Reasonable Production Allocation Of Dawan Area

Puguang Gas Field including subject of Puguang,Da wan,Laojun block, belongs to theacid gas field of marine sediments,As the representative of high content of H2S of carbonaterock with burial depth,reservoir thickness,strong heterogeneity,with high content of H2S, withedge water etc,which the production dynamic characteristics are more complex. Comparedwith subject of Puguang,the structure of Dawan block is relatively complex and the maingas-bearing bed thickness is a little thin.Due to close to the west line of the phase transition，more serious reservoir heterogeneity,more complex gas-water relations，more horizontal wells，more varied well conditions increasing the difficulty of field development.According to the gas well head pressure,output and change characteristics,this paperevaluated gas well deliverability,analyse the variations characteristics of pressure on basis ofpressure measurement data.This article analyses fluid property and the ratio of liquid to gaschanges in order to provide the foundation for fluid distribution and acid backflowing. Basedon geological understanding and dynamic data,this research analyzes the inter-wellconnectivity and eventually provide a basis for reasonable well proration. Aiming at thecurrent condition that gas well productivity is relatively high production pressure differencewas generally small,the main consideration is that the gas well is affected by factors such asliquid capacity and formation water. This article created the gas well reasonable prorationplan by using gas reservoir engineering numerical simulation.In this paper,the results of the studies have important guide sense and practicalapplication value for achieving Dawan reservoir’s high and stable yield.The conclusions canalso offer theory reference for this type reservoir’s advisable development.