| Abstract |
The alternative energy at this moment which called the green energy is a geothermal energy. Geothermal energy is advantages, because that energy can be exploitation or converting to electric power for people needs, if the production of geothermal energy exploited continuously, the production well will be declined and for raising the production, the well must be stimulated. One of the well stimulation for raising the production well is called hydraulic fracturing. The hydraulic fracturing in geothermal field or hydro fracturing or fracking involves the pressurized injection of fluids commonly made up of water and chemical additives into geologic formation. The pressure exceeds the rock strength and the fluid opens or enlarges fractures in the rock. The chemical additives which used in the fracking is a propping agent or “proppant”, such as sand, is pumped into fracture formation to keep them from closing as the pumping pressure is released. The fluids of fracking are returned back to the surface from the well which injected and natural gas or oil will flow from fracture in the rock or pores into the well and the production will be increasing. The main points of hydraulic fracturing treatment design are design of proppant, fracture fluid, pumping rate selection and economic analysis in the water dominated geothermal field. To chasing the optimizing design, the sensitivity of changing variables proppant, and pumping rate must be done, so that the NPV will be optimized. The parameters optimum case are proppant agent 20/40 carbolite, PrimeFrac 30, maximum Proppant concentration 12 PPA, pumping rate 25 bpm and NPV of hydraulic fracturing treatment in 1 year reach about $ 1,623,608.5 (US) with optimum fracture 400 feet and benefit cost ratio (BCR) about 1.08. |