Design and optimization of hydraulic fracturing by combination of UFD method and two-dimensional KGD model in a hypothetical reservoir

Hydraulic fracturing is one of the most important methods that has been used for several years to increase production, especially in low permeability fields. There are many two-dimensional and three-dimensional models to design hydraulic fracturing, which in this paper by using a combination of the Unified Fracture Design method and two-dimensional Khristianovich-Geertsma De klerk model, an optimum hydraulic fracturing design is modeled.In this paper, by making an initial guess for the amount of fracture permeability in different proppant mass, the parameters required to design hydraulic fracturing are obtained, and then by using graphs that connect fracture conductivity, fracture closure, and proppant concentration in fracture, fracture permeability will be updated. These graphs are different for different proppant types where in this article, the graph related to sand with mesh size 30/50 has been used.After calculating all the required parameters in the different proppant masses, is necessary to select the most suitable proppant mass, which two different ways can be used; in the first method, according to the values of some parameters such as injection rate, skin effect, surface injection pressure, efficiency of hydraulic fracturing operation and other parameters, the desired proppant mass is selected and in the second method the proppant mass corresponding to the desired injection rate is obtained and the design of the hydraulic fracturing is based on the intended injection rate. Finally, to ensure the accuracy of the results obtained by this method, a sensitivity test is performed which proves the validity of this method.