COMPOSITION AND METHOD FOR RECOVERING HYDROCARBON FLUIDS FROM A SUBTERRANEAN RESERVOIR

• Main Authors: WEI, MINGLI, CHANG, KIN-TAI, KURIAN, PIOUS
• Format: Patent
• Language: English; French
• Published: 02.06.2020
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; GENERAL PROCESSES OF COMPOUNDING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINING; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

A composition comprising crosslinked expandable polymeric microparticles capable of hydrolysis at or below neutral pH and a method of modifying the permeability to water of a subterranean formation by introducing such compositions into the subterranean formation is disclosed and claimed. This invention further relates to compositions and methods for the recovery of hydrocarbon fluids from a subterranean reservoir or formation subjected to CO2 or CO2 Water Alternating Gas flooding at low pH and increases the mobilization and/or recovery rate of hydrocarbon fluids present m the subterranean formations. La présente invention concerne une composition comprenant des microparticules polymères expansibles réticulées pouvant être hydrolysées à pH neutre ou en dessous et un procédé permettant de modifier la perméabilité à l'eau d'une formation souterraine par introduction desdites compositions dans la formation souterraine. La présente invention concerne en outre des compositions et des procédés permettant la récupération de fluides hydrocarbures à partir d'un réservoir souterrain ou d'une formation souterraine soumis(e) à une injection de CO2 ou à une injection alternée d'eau et de CO2 à bas pH et qui augmentent la mobilisation et/ou le taux de récupération de fluides hydrocarbures présents dans les formations souterraines.