China University of Petroleum

Tongke Zhou

Qichao Lv

Rong Zheng

Zhaoxia Dong

Abdolhossein Hemmati-sarapardeh

Juan Zhang

Honglei Zhan

Longxuan Li

Zilong Liu

Zihao Yang

Meiqin Lin

Hossein Jalalifar

Wei Wang

Chenggang Xian

Zhengen Gao

Haimin Zheng

Jiayang Luo

Jingxue Wang

Xinshu Guo

Ya Zhao

Mehdi Ostadhassan

Saeid Norouzi Apourvari

Tingting Yi

Junjian Li

A preparation method of a micro-nanofluidic model of triple-medium carbonate reservoir includes the following steps: obtaining a cave structure, a fracture structure and a pore structure of a carbonate rock, and preparing a first mask, a second mask and a third mask respectively; forming a photoresist layer on a glass substrate, and subjecting the photoresist layer to an exposure treatment and an etching treatment through the first mask, the second mask and the third mask sequentially, and then subjecting to a washing treatment, to obtain a first intermediate model; fitting the etched side of the first intermediate model with a glass cover, and subjecting to a bonding treatment, to obtain a second intermediate model; introducing a first solution, a second solution and a third solution into the second intermediate model sequentially to form a calcium carbonate nanocrystalline layer and to obtain the micro-nanofluidic model of triple-medium carbonate reservoir.

Preparation method of micro-nanofluidic model of triple-medium carbonate reservoir

An aqueous carbon dioxide foam stabilized by organic Janus nanosheets, a preparation method and application thereof. The preparation method can be provided as: S1: subjecting molecules with hydrophobic tail to spontaneous and ordered arrangement in a mixture of ethanol and water; S2: adding molecules with hydrophilic head to the solution of S1, and adjusting a pH value to 6.0-6.5 to perform a synthesis of organic Janus nanosheet monomers; S3: adding ethanol to the solution of S2, and adjusting the pH value to 6.0-6.5 to perform a heating reflux; then adjusting the pH value to 7.0-8.0, and adding sodium ethylate, adjusting a temperature to 70-85° C. to perform a reaction under an inert atmosphere, and then adjusting the pH to 8.0-9.0, and stirring to be completely dissolved. The aqueous COfoam is prepared from COand a liquid phase.

Aqueous carbon dioxide foam stabilized by organic Janus nanosheets and preparation method and application thereof

The present disclosure provides a method of nano-armored foam reinforced geological storage of carbon dioxide. A pre-COslug, a surfactant foam slug, a nanoparticle-enhanced foaming liquid slug and a post-COslug are injected successively into a geological storage formation, where the post-COslug is injected multiple times in equal portions, and a well soaking is performed after each injection. A nanoparticle-enhanced foaming liquid is made by using nanoparticles of different dimensions or using nanoparticles of multiple dimensions at the same time based on the reservoir characteristics. During the process of well soaking, a supercritical COand the nanoparticle-enhanced foaming liquid in the formation can in situ generate single-dimensional or composite-dimensional nano-armor reinforced COfoam underground, which can plug channeling path and expand the COstorage range, and make respective slugs cooperate with each other, thereby enlarging a geological storage amount of CO.

Method of nano-armored foam reinforced geological storage of carbon dioxide

Environment-friendly reinforced foam for underground hydrogen storage and a preparation method thereof. The reinforced foam includes hydrogen and a liquid phase, where the liquid phase is an aqueous solution of a foaming agent, a foam stabilizer, a pH regulator and a particle cosolvent; and the foam stabilizer is a compounded system composed of 0-dimensional nanomaterial and 1-dimensional nanomaterial at a mass ratio of 2-5:1. In the reinforced foam of the present disclosure, the 0-dimensional and the 1-dimensional nanomaterials are compounded to form a nano-armor layer, which improves the stability of foam and the interfacial viscoelasticity of a liquid film by synergistic reinforcement, and inhibits the viscous fingering, escape and leakage of hydrogen in a reservoir, thereby not only being beneficial to improving the mobility of hydrogen, but also increasing the safety of hydrogen underground storage.

Environment-friendly reinforced foam for underground hydrogen storage and preparation method thereof

An infinitely expandable modular visual device for simulation of flow in porous media, including a simulation component, a fluid conveying component, and an image acquisition component; the simulation component includes a plurality of simulation units forming at least one layer of simulation unit array, the simulation unit includes a mounting base and a microscopic visualization model including a chip cover and a chip carrier having a porous media region and covered by the chip cover; the mounting bases of respective simulation units are connected to each other, the porous media regions of adjacent simulation units are communicated with each other; the fluid conveying component includes an injection-production pipeline communicated with the simulation units and configured to introduce the simulation fluid into the porous media region; the image acquisition component includes an image sensor facing the simulation unit for acquiring images of fluid flow in porous media.

Infinitely expandable modular visual device for simulation of flow in porous media

The present disclosure discloses a waterless foam generator for fracturing shale oil and gas reservoirs and use thereof. The structure of the waterless foam generator includes: a top of the proppant storage tank is provided with a proppant inlet, a second feed port of liquid COand a safety valve, and a bottom of the proppant storage tank is connected to the high-pressure gas-liquid-solid mixer, a side wall of the high-pressure gas-liquid-solid mixer is provided with a first feed port of liquid CO, an feed port of Nand an feed port of waterless foam foaming agent, and the high-pressure gas-liquid-solid mixer is connected to the first shaker of waterless foam fracturing fluid, the first shaker of waterless foam fracturing fluid, the second shaker of waterless foam fracturing fluid and the third shaker of waterless foam fracturing fluid are connected in sequence.

Waterless foam generator for fracturing shale oil and gas reservoirs and use thereof

The disclosure discloses a foam fracturing fluid with double interface layers of a phlogisticated air-liquid COfor shale gas development, and a preparation method thereof. The foam fracturing fluid is prepared from a liquid COphase, a gas phase and a nano-enhancer; the liquid COphase is formed by dissolving a mixture of gas-soluble foaming agents in liquid CO; the gas phase is a gas mixture of phlogisticated air and saturated vapor of the liquid CO; the nano-enhancer is an aqueous solution of a mixture of hydrophobic silica nanoparticles, a cosolvent and a water-soluble surfactant. In the fracturing fluid prepared by the present disclosure, the phlogisticated air was encapsulated by the liquid COto form an interface layer, the liquid COwas further encapsulated by the nano-enhancer to form the other interface layer, which enhanced the structural stability of the fracturing fluid while achieving high viscosity and thermal stability.

Foam fracturing fluid with double interface layers of a phlogisticated air-liquid CO2 for shale gas production and preparation method thereof

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Beijing, China

Tongke Zhou