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1. WO2020068443 - OIL RECOVERY PROCESS USING AN OIL RECOVERY COMPOSITION OF AQUEOUS SALT SOLUTION AND DILUTE POLYMER FOR CARBONATE RESERVOIRS

Publication Number WO/2020/068443
Publication Date 02.04.2020
International Application No. PCT/US2019/050881
International Filing Date 12.09.2019
IPC
C09K 8/588 2006.01
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
58Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
588characterised by the use of specific polymers
C09K 8/594 2006.01
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
58Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
594Compositions used in combination with injected gas
CPC
C09K 2208/10
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
2208Aspects relating to compositions of drilling or well treatment fluids
10Nanoparticle-containing well treatment fluids
C09K 8/588
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
58Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
588characterised by the use of specific polymers
C09K 8/594
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
58Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
594Compositions used in combination with injected gas ; , e.g. CO2 orcarbonated gas
Applicants
  • SAUDI ARABIAN OIL COMPANY [SA]/[SA]
  • ARAMCO SERVICES COMPANY [US]/[US] (AG)
Inventors
  • AYIRALA, Subhash, Chandrabose
  • AL-YOUSEF, Ali, Abdallah
  • AL-SOFI, Abdulkareem, M.
Agents
  • RHEBERGEN, Constance, Gall
Priority Data
16/140,06224.09.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OIL RECOVERY PROCESS USING AN OIL RECOVERY COMPOSITION OF AQUEOUS SALT SOLUTION AND DILUTE POLYMER FOR CARBONATE RESERVOIRS
(FR) PROCÉDÉ DE RÉCUPÉRATION DE PÉTROLE FAISANT APPEL À UNE COMPOSITION DE RÉCUPÉRATION DE PÉTROLE D'UNE SOLUTION SALINE AQUEUSE ET DE POLYMÈRE DILUÉ POUR RÉSERVOIRS DE CARBONATE
Abstract
(EN)
An oil recovery composition of an aqueous solution of one or more salts and dilute polymer and processes for enhanced oil recovery using the oil recovery composition are provided. An oil recovery composition may include an aqueous solution of one or more salts having a salinity of about 4000 parts-per-million (ppm) total dissolved solids (TDS) to about 8000 ppm TDS, a polymer having a concentration of 250 ppm to 500 ppm, metal oxide nanoparticles of up to 0.1 weight (wt) %, and dissolved CO2. The one or more salts may include at least one of sodium chloride (NaCl), calcium chloride (CaCl2), magnesium chloride (MgCl2), sodium sulfate (Na2S04) and magnesium sulfate (MgS04). The polymer may include a copolymer of acrylamide and acrylamido tertiary butyl sulfonate (ATBS). The oil recovery compositions provided may be suited for enhancing oil recovery in carbonate reservoirs having in situ oil viscosities less than 3 centipoise (cP).
(FR)
La présente invention concerne une composition de récupération de pétrole d'une solution aqueuse d'un ou plusieurs sels et d'un polymère dilué et des procédés d'amélioration de la récupération de pétrole faisant appel à la composition de récupération de pétrole. Une composition de récupération de pétrole peut comprendre une solution aqueuse d'un ou de plusieurs sels ayant une salinité d'environ 4 000 parties par million (ppm) de matières dissoutes totales (MDT) à environ 8 000 ppm de MDT, un polymère ayant une concentration de 250 ppm à 500 ppm, des nanoparticules d'oxyde métallique à une proportion allant jusqu'à 0,1 % en poids, et du CO2 dissous. Le ou les sels peuvent comprendre du chlorure de sodium (NaCl), du chlorure de calcium (CaCl2), du chlorure de magnésium (MgCl2), du sulfate de sodium (Na2SO4) et/ou du sulfate de magnésium (MgSO4). Le polymère peut comprendre un copolymère d’acrylamide et d'acrylamido-sulfonate de butyle tertiaire (ATBS). Les compositions de récupération de pétrole selon l'invention peuvent convenir pour l'amélioration de la récupération de pétrole dans des réservoirs de carbonate présentant des viscosités in situ du pétrole inférieures à 3 centipoises (cP).
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