Selective plugging water control diversion fracturing method for oil well with medium and high water content

• Main Authors: YIN GUOYONG, LI YANHONG, WANG HAIQING, YANG BOLI, ZHAO WEI, TAO CHANGZHOU, XU HONGXING, LI HUANXIANG
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2024
• Subjects: ADHESIVES; CHEMISTRY; DYES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; 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; PAINTS; POLISHES

The invention provides a medium-high water content oil well selective plugging water control diversion fracturing method which comprises the following steps: monitoring and identifying connectivity of an injection-production well pattern, and determining a water outlet layer section position, a medium-high water content type and a water incoming direction; three-section multi-slug selective plugging water control is conducted, specifically, a relative permeability improving agent is injected into a front slug so as to adjust and improve the relative permeability of matrix oil and water around a water breakthrough channel; injecting a gel plugging agent for plugging water into the main body slug to plug a water breakthrough micro crack, a water breakthrough channel and a crack front section; injecting permeable fine cement or consolidation sand into the sealing section plug so as to seal the water plugging section plug; and after the relative permeability improving agent, the gel plugging agent for water plugg