Research On Hydraulic Fracturing Improvement Effects For Burial Hill Condensate Reservoir

Condensate gas reservoirs are a special type of gas reservoir with high economic value,which occupies a large proportion in the development of gas reservoirs in China.For low permeability condensate gas reservoirs,hydraulic fracturing is the main means of increasing production.In recent years,with the continuous improvement of fracturing technology,the success rate and the post fracturing effective rate have been gradually improved.However,there has not yet formed a complete technical system because the two-phase zone and the condensation liquid will appear around the fracture surface,resulting in changes in the relative permeability of gas and liquid phase and affecting the production ability of fractured gas wells.To begin with,this paper summarizes and analyzes the reservoir characteristics,the status of fracturing research,production prediction and numerical simulation research of of domestic and foreign condensate gas reservoirs.Then,it establishes a geological and a post-frac production prediction model,carries out an optimal design of fracturing parameters under different well types(vertical and horizontal well)by the numerical simulation technology.On the basis of that,it carries out the research on circulating gas injection plan.Finally,it predicts the post-frac production performance and valid period under different development schemes to design an optimal fracturing development plan,aiming to realize the economic and effective development of the buried hill gas condensate reservoir and give an advice to the similar condensate reservoirs.