Talk:Well stimulation

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In the petroleum industry, stimulation (sometimes called "well stimulation", or "formation stimulation") is any action on the hydrocarbon producing formation or wellbore that increases the production rate. Typicall the simplest form is pumping inhibited hydrochloric acid which will dissolve carbonates without damaging the steel tubulars and items in the wellbore. Additional additives such as soaps are often added to assist placement or return of spent acid. In sandstone formations the addition of hydrofluoric acid will assist in the removal of clays which often impede the flow of hydrocarbons. Hydraulic fracturing is an extreme form of stimulation, where the rock is broken open by the application of high pressure and a crack forms. In highly soluble formations, acid is used to etch the walls of the crack to form extra conductive flowpaths when the pressure is released. In other formations, sand or other materials are added to the fluid injected which full the crack (fracture) with a highly porous and permeable material that alters the complete flow mechanism of the reservoir and often dramatically increases production.

I just paste it here in case it contains some parts that somebody would like to use in the article. Lova Falk    talk   07:22, 8 March 2013 (UTC)