GASFRAC's proprietary waterless LPG (liquefied petroleum gas) stimulation process utilizes gelled LPG in place of conventional frac fluids. The LPG is primarily propane and butane, C3H8 and C4H10, naturally occurring hydrocarbons that is non-damaging to the formation. The LPG stimulation process has very significant benefits for both operator and environment.
Environmental benefits begin with using no water, but also contains no biocides or carcinogens, eliminates post job waste water steams, clean-up or inadequate recycling attempts. In an ideal scenario, it is possible to flow back, recapture, recycle and reuse the propane from the stimulated well thus creating optimal environmental and economic benefits for the operator. In addition, the process of recapturing and recycling of the propane reduces or eliminates the environmental concerns of flaring.
This process also increases production rates or well performance of the stimulated well.The LPG properties, as compared to water, of density, viscosity and surface tension with complete solubility in formation hydrocarbons are highly beneficial to the process of optimizing the well production performance. Efficient recovery of the LPG, rapid clean-up, no phase trapping, and LPG properties allow for extended shut‐in times without detriment. The ability to immediately recovery 100% of the fracturing fluid is a precursor to creating a much longer effective fracture length that results in increased production rates or increased well performance as compared to conventional water fracturing systems.