| abstract |
A two-step process to stimulate a horizontal wellbore drilled into a carbonate formation. Initially, the wellbore is filled with acid. Because vertical communication exists in the vicinity of the wellbore, the acid enters into the fissures and cracks from the wellbore. Thereafter, a non-reactive displacement fluid, having a density greater than the acid, is injected into the wellbore. This more dense displacement fluid pushes the acid to greater depths into the formation so carbonate dissolution can take place which substantially increases the formation's permeability. Increased permeability enhances the production of hydrocarbonaceous fluids. |