Production Prediction Method Study For Fractured Gas Well In Xushen 6 Block

In natural gas storage has proven,belongs to low permeability and extra-low permeability reservoir,occupies a large proportion of the low permeability gas reservoir because of the low permeability,characterized by low single-well production,some without fracturing without natural gas reservoir capacity,therefore,generally used such as hydraulic fracturing stimulation for low permeability gas reservoir reservoir renovation.Expanding exploration in daqing oil field in 2002 found a large low permeability gas reservoir of volcanic rocks,but in such complex lithologic reservoir pressure after the production forecast,USES mostly homogeneous sandstone gas reservoir pressure after yield prediction model,and the actual difference is bigger,and can't accurate analysis of the main factors influencing the fracturing gas well production capacity,makes the deep complex lithology gas well fracturing gas well(especially development)size optimization of the lack of the basis,therefore,in view of the above problem,this paper carried out the following work:First of all,research the basic characteristics of the volcanic rock gas reservoir xu deep gas field,analyzes the triple porosity volcanic rock gas reservoir and glutenite reservoir pressure flow form,after three linear elliptic flow theory and flow theory of volcanic rock reservoir is established and glutenite reservoir of conventional darcy seepage and low-speed non-darcy seepage flow mathematical model of fracturing gas well production is predicted under the condition of the basic principles of fracturing gas well production forecast is given.Second,using the Laplace inversion and doha beauty principle,obtained the volcanic reservoir and glutenite reservoir fracturing gas well production and the analytical solution of change over time,rendering the volcanic rocks and glutenite reservoir fracturing gas well production decline typical log-log curve,discusses the gas reservoir gas well production decline rule after fracturing,reservoir parameters are analyzed and fracture parameters on the gas well pressure after the influence law of production decline curve.Third,after drawing the gas well pressure chart output prediction theory,fracture half length and flow conductivity chart optimization theory,parameters optimization curve is obtained under different conditions,the fracture half length and flow conductivity are optimized analysis,gives the optimization of fracturing fracture half length and fracture flow conductivity method,using the optimized curve to fracture half length and flow conductivity to increase yield was analyzed,and the influence of the actual fracturing scheme is optimized design of fracturing gas well.Fourth,6 blocks combined with xu deep volcanic gas reservoir geology,logging and fracturing design and other relevant data,gives the development of gas well production after fracturing volcanic rocks gas reservoir reservoir prediction,and a method for determining the parameters of established a set of suitable for xu volcanic rock and deep six blocks glutenite reservoir development and production of gas well pressure after prediction method,on the production and development of gas well prediction method is verified.