Study on the possibility of using water-soluble chemicals to generate heat and pressure in single well treatment for improved oil recovery
Abstract
In the final stage of oil and gas extraction process, along with the decline in reservoir pressure and the increasing degree of submergence, inorganic and organic contamination tends to increase rapidly and reduce the production rates. Organic contamination especially increases in oil reservoir intervals with high contents of paraffin, resin and asphaltene (heavy oil). In this case, the heat methods, using an organic solvent for near-wellbore treatment to enhance oil recovery, are given priority. The authors have studied the possibility of using water soluble chemical systems based on the exothermal reaction between NaNO2 and NH4Cl capable of generating heat and pressure for the purpose of treating single wells to improve oil recovery.
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