Study On The Pressure Field In Fracture Of FracPac Process

Frac and pack technique is a combination of hydraulic fracturing andgravel packing.It can control fracture geometry to get"wide and shortfracture".It would serve the dual effect of increasing output with sandcontrol,so it can meet the special need of mediate and high permeability sandreservoirs.In the construction process reservoir permeability and pressurechanges are complicated,which is the key to the success of the constructionprocess.The paper studied the sanding mechanism and laws of mediate andhigh permeability sand reservoirs,and analysed sand control mechanism andincrease production mechanism of frac and pack technique.In addition,analysed its traits of construction work and elaborate stressly essentials ofconstruction work.And this paper built up a leakoff model and a fractureextended model,used both of the two models to compute the changes offracture geometry and pressure in fracture,and based on the theory Iprogrammed.The theory and application program in this paper has beenverified by the oil well datum of Shengli Oilfield.In addition,this paper usedsimple physical, mathematical models and node analysis method to studysand falling out process.Finally,the paper introduced a fracture detectionmethod for using in monitoring sand falling out process.