Study of exothermic reactions for the non-reactive matrix stimulation
Keywords:
Permeability, Stimulation, Exothermic reaction, Nitrogen, Asphalt, Damage to the formationAbstract
The change in pressure and temperature that the hydrocarbon is subjected during its production, favors the precipitation of organic solids. This causes formation damage as it clogs the pore space and reduces permeability. When these components adhere to the rock in the form of colloids, they impede the flow of oil, reducing the productivity of the wells. The Well Stimulation Thermochemical System (WSTCS) has been designed to perform non-reactive matrix stimulations in oil and gas reservoirs that require the removal of damage and the restoration of flow in the producing well. This technology consists of contacting activated ammonia and / or nitrogenous salts with a catalyst (organic acid), in order to initiate an exothermic reaction that releases energy in situ (79,9 Kcal/mol), generates nitrogen and removes organic blockages that cause damage to the producing formation and plugging in production lines. The WSTCS system combines different ammonia and/or nitrogenous salts depending on the type of damage in the formation or obstruction of the pipe that is required to be removed. This article intends to disseminate academically the results of the laboratory tests carried out at the University of Zulia of the WSTCS system to evaluate the effectiveness of damage removal in crude oil precipitated with asphalt.
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