Paper: Gas Frac A New Stimulation Technique Using Liquid Gases

Gas Frac is a fracturing treatment using a new and absolutely water free fluid system. The fluid is liquefied petroleum gas and liquid carbon dioxide mixed in such a ratio that they remain a liquid and behave as other liquids a long as they are under adequate pressure and below their critical temperature. After the fluid is heated to this temperature in the reservoir and pressure released, the liquid reverts to a gas. This results in extremely rapid clean-up and no residual fluids are left in the formation. Gas Frac was developed especially for gas well stimulation. Results to date have proved this technique to be very successful. This paper discusses the techniques, materials and equipment used. An analysis of results of fracture treatments is presented.