Proppant Convection Model And Horizontal Wells Hierarchical Fracturing Design And Simulation Software Development

Horizontal well sectionalized hydraulic fractured technology has been a high speed development as a means of increasing production in low permeability reservoir, but compare to the fracture-extend model, temperature model, surface treatment pressure model, it advanced slowly in the proppant transport model. The propant convection settling has been effect on the transport than the settling after the investigation. And the transport model that it only think over the settling don't adapt the demand of hydraulic fracture technology. The fracture simulation technology need a good model to describe the propant's movement in the fracture and to direct the fracture design and treatment in horizontal well hydraulic fracture.Aim at these question, it investigated the convection mechanism when the propant transport in the fracture on the base of scholar's researched, and establish the calculation of settling because of the proppant convection, then researched the condition of convection arriving. The affect on the convection settling velocity of fracture width, the property of slurry, temperature, concentration and flow rate is discussed. Among the rest, the affect of the property of slurry and the fracture width is very evidence. On the base of research, it set up the movement velocity of uprightness and horizontal direction, then set up the convey model including the proppant convection affect. Because of the parameter affected each other, the traditional solving process can't solved the question, so we lead in the interface trace means to solve the convection model. After the analysis on location, it indicted that the model can predict the main parameter of movement velocity and concentration distribution.Because the need of horizontal well design, we build the model of fracture extend, temperature model. And improved the model of perforation pressure-drop, then set up theprediction model of treatment pressure.On the base of these theory, we workout the horizontal well sectionalized hydraulic fractured software including the convection affect. Use it, it can know the shape of fracture, concentration of proppant, treatment pressure, temperature of fracture and so on, it has a very important theory and reality value to the treatment.