E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/22 (2006.01) C12N 1/20 (2006.01)
Patent
CA 2725708
The present invention refers to a biotechnological process that enhances oil recovery with a 14 to 25 API Gravity contained in carbonated and/or clayey sandstone porous systems with low permeability (7 to 100 Md), thus focused to petroleum wells associated to zones with low recovery factor; by the indigenous extemophile microorganisms activity from the oil reservoir and the IMP culture, as well as its metabolites (gases, acids, solvents and surfactants), which improved oil mobility and are able to develop at 60 to 95 °C temperatures, 7 to 154.6 Kg/cm2 (100 to 2,200 psi) pressures and NaCl content from 5,000 to 45,000 ppm, in anaerobic conditions. The biotechnological process of the present invention consists on: indigenous microorganisms sampling, collecting and characterization from the reservoir; formulation of culture media; selection, enrichment, activation and preservation of such microorganisms, as well as biostimulation (indigenous microorganisms) and bioaugmentation (IMP culture) to increase the metabolite production, useful for oil recovery in a porous media impregnated with oil; process implementation in carbonated and/or clayey sandstone porous systems, with one or several cycles and confinement periods from 5 to 10 days, to increase oil recovery. Experimental tests show that the biotechnological process of the present invention supplies an oil recovery increase up to 30 %, additional to that obtained in secondary recovery processes.
Castorena Cortes Gladys Teresa
Olguin Lora Patricia
Roldan Carrillo Teresa Guadalupe
Zapata Penasco Norma Icoquih
Gowling Lafleur Henderson Llp
Instituto Mexicano Del Petroleo
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