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Title: Process for producing modified microorganisms for oil treatment at high temperatures, pressures and salinity

This invention relates to the preparation of new, modified organisms, through challenge growth processes, that are viable in the extreme temperature, pressure and pH conditions and salt concentrations of an oil reservoir and that are suitable for use in microbial enhanced oil recovery. The modified microorganisms of the present invention are used to enhance oil recovery and remove sulfur compounds and metals from the crude oil. The processes are comprised of steps which successively limit the carbon sources and increase the temperature, pressure and salinity of the media. This is done until microbial strains are obtained that are capable of growing in essentially crude oil as a carbon source and at a temperature range from about 70 C to 90 C, at a pressure range from about 2,000 to 2,500 psi and at a salinity range from about 1.3 to 35%. 68 figs.
Inventors:
;
Issue Date:
OSTI Identifier:
201508
Assignee:
Associated Universities, Inc., Washington, DC (United States) PTO; SCA: 020300; 550700; PA: EDB-96:051365; SN: 96001551778
Patent Number(s):
US 5,492,828/A/
Application Number:
PAN: 8-169,417
Contract Number:
AC02-76CH00016
Resource Relation:
Other Information: PBD: 20 Feb 1996
Research Org:
Associated Universities Inc
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 55 BIOLOGY AND MEDICINE, BASIC STUDIES; MICROBIAL EOR; MICROORGANISMS; GROWTH; PETROLEUM; DESULFURIZATION; DEMETALLIZATION; RESERVOIR TEMPERATURE; RESERVOIR PRESSURE; CULTURE MEDIA