34results about How to "Reduce coalescing" patented technology

An atomized acid wellbore flow simulation platform for gas injection to develop fractured-cavity reservoirs, mainly including a double-flow Venturi atomization generating device, a wellbore flow simulation device and an atomizing evaluation device; the atomizing generating device includes a gas Road system, liquid circuit system, atomization generator; the gas circuit system includes an air compressor, a gas throttle valve, and a gas pressure gauge; the liquid system includes a high-pressure acid-resistant pump, a liquid throttle valve, and a liquid pressure gauge; the The simulated wellbore is used to connect the double-flow Venturi atomization generating device, including three parts: a vertical wellbore, a horizontal simulated formation, and a fluid collection device; the observation system includes a nano-laser particle size analyzer. A working method of an atomized acid wellbore flow simulation platform used for gas injection to develop fracture-vuggy reservoirs. The simulation platform can be applied to the oilfield site to control the injection displacement through the gas and liquid system, maintain a high acid atomization rate according to the site construction requirements, improve the acidification effect of fracture-cavity reservoirs, and realize fracture-cavity storage units effective communication.

The invention discloses an oil field ultra-high water cut stage fly ash reinforced multiphase composite profile control and flooding method. The method comprises the following step: sequentially adopting fly ash reinforced foam, surfactant foam, microemulsion and water for profile control and flooding, wherein the fly ash reinforced foam is prepared from a gas phase and a liquid phase I; the liquid phase I is an aqueous solution of a foaming agent I, fly ash and a gas-liquid interface regulator; the surfactant foam is prepared from a gas phase and a liquid phase II; the liquid phase II is an aqueous solution of a foaming agent II; the microemulsion consists of a compound surfactant, a cosurfactant, an oil phase, an inorganic salt and water; and the compound surfactant is a compound of SDSand Tween 80. According to the method, through the action among the fly ash reinforced foam slug, the surfactant foam slug and the microemulsion slug, the opening and closing of a large pore channel can be regulated and controlled, the flow resistance is reduced, the regulation and flooding effect of blocking without blocking off is realized, the flow and production of crude oil are facilitated, and the purpose of economic and efficient development of an oil reservoir is achieved.

The invention provides a preparation method of an AKD paper sizing agent. The method comprises the following steps: (1), dissolving HAuCl4 and PVP-DADMAN into water, boiling the water, then adding a reducing agent, keeping the HAuCl4 and PVP-DADMAN in dark place, stirring to make the HAuCl4 and PVP-DADMAN react, performing centrifugation, and performing vacuum drying on supernate, so as to obtainmodified nanometer gold particles; (2), dissolving PEOS into molten AKD, and taking the PEOS as an oil phase; dispersing the modified nanometer gold prepared in the step (1) into water, adjusting pH to be acidic, and taking the modified nanometer gold as a water phase; performing ultrasonic mixing on the water phase and the oil phase while heating, and allowing the water phase and the oil phase tostand still, so as to obtain oil-in-water type AKD Pickering emulsion, namely the stress induced AKD paper sizing agent. The sizing agent effectively reduces coalescence of AKD oil drops, greatly improves the stability of emulsion, ensures that water phase and oil phase are not separated out after the emulsion is stabilized for a plurality of months, does not need to add any surfactants and othermodifiers, and is simple in structure and easy to operate.

The invention provides an emulsifier for Pickering emulsion. The inner core of the emulsifier is nano-gold particles grafted and modified by PVP-DADMAN and is embedded in PEOS; the mass ratio of nano-gold, PVP-DADMAN and PEOS is 4:1:2 to 2:3:10; the average diameter of the emulsifier is 35-75nm; and the shape of the emulsifier is irregular polygon. The emulsifier for the Pickering emulsion can beapplied to paper making, especially for preparing liquid paraffin emulsion for paper making. The emulsifier provided by the invention can obtain stable Pickering paraffin emulsion, and can effectivelyreduce coalescence between paraffin oil droplets, greatly improve emulsion stability and stabilize the emulsion for months without water phase and oil phase precipitation without the need to add anysurfactant and other modifiers, and the steps are simple and easy to operate.