Numerical Simulation Study Of Hydraulic Fracturing In The Beach-bar Sand Reservoir

The beach-bar sand reservoir is mainly composed of the fine siltstone,the porosity and permeability of reservoir are low and physical properties is poor.What’s more,the reservoir have many thin interbed.So hydraulic fracturing is the major way of development.We used the core indoor physical experiment parameters as a basic reference,then developed a new fracturing fracture simulation method which based on finite element technology RFPA-HF.Afer that we set up a set of hydraulic fracturing fracutre numerical simulation method and to calibrate the key parameter of numerical simulation according to the core experiment using RFPA-HF method.In this way,we can research the factors which affect the parameters of the crack longitudinal extension including Stress difference,reservoir physical property,thin interbed of vertical well and horizontal well and so on.In the end,through the study of beach-bar sand reservoir fracture morphology criterion we evaluated the reservoir compressibility.The results prove that main factors of core compressibility are mechanical properties and thickness of mudstone layer,stress difference and the stratification between sand and mud.According to the above main controlling factors,we evaluated the beach-bar sand reservoir’s compressibility and presented the preliminary recommendations for the construction technological parameters.