Controllable cross-linked gel water plugging and leak plugging material for oil and gas field

• Main Authors: HE YINGLAN, ZHAO JINZHOU, ZHOU MING
• Format: Patent
• Language: Chinese; English
• Published: 01.08.2012
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention relates to a controllable cross-linked gel water plugging and leak plugging material for an oil and gas field, which can plug cracked or solution-opened leak formation, and increase the gel strength. The technical scheme adopted by the invention is as follows: firstly adding acrylamide, chromium trichloride and N,N-methylene bisacrylamide to a beaker holding deionized water, after dissolving, adding an initiator, standing at room temperature for 1h to obtain gel, granulating, drying and screening to obtain solid particulates; adding Span-80 to cyclohexane to prepare an oil phase; dissolving acrylamide and N,N-methylene bisacrylamide in deionized water to prepare a water phase; adding the solid particulates to the water phase, uniformly mixing, then adding to the oil phase, sufficiently stirring, dropwise adding the initiator, reacting for 2h, adding a dispersant, filtering, washing and drying to obtain wrapping particles, wherein the wrapping particles can be wrapped again; and adding the partic