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公开(公告)号：US10746638B2
公开(公告)日：2020-08-18
申请号：US15775391
申请日：2016-12-02
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Ping Guo , Shuai Wu , Wanbo Zhang , Yisheng Hu , Yijian Chen , Huimin Zhang , Zhouhua Wang , Jianfen Du , Huang Liu , Hongmei Ren
Abstract: A direct method for manufacturing a large model fractured core and maintaining original oil-water saturation, including the following steps: (1) determining the volume V, porosity φ, permeability K, oil saturation So, water saturation Sw and the like of a fractured core to be manufactured; (2) preparing simulated oil, and determining the used oil mass mo=Vo×ρo; (3) under the circumstance of no consideration of oil saturation, acquiring the mass of the used water, cement and quartz sand; (4) while establishing oil saturation, acquiring the mass mw of water for manufacturing the core as mw=a−Vo×ρw; (5) mixing oil, water and an emulsifier evenly to prepare an oil-in-water emulsion; (6) adding cement and quartz sand into the emulsion and stirring evenly to obtain cement slurry; (7) when a cement sample is in a semi-solidified state, cutting the cement sample with a steel wire; and (8) solidifying the cement sample to the end.
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公开(公告)号：US11459880B2
公开(公告)日：2022-10-04
申请号：US16839692
申请日：2020-04-03
Applicant: Southwest Petroleum University
Inventor： Yisheng Hu , Xuan Bai , Ping Guo , Jianfen Du , Zhouhua Wang , Huang Liu
Abstract: The invention discloses a method for evaluating the difference in gas injection effect of gas injection wells in a carbonate reservoir, aiming at solving the problem that the difference in effect characters of gas injection wells cannot be systematically evaluated in the prior art, and realizing the purposes of systematically and completely evaluating the difference in gas injection effect in the carbonate reservoir and finding out the reason of low efficiency. By means of the invention, reasons for low gas injection efficiency corresponding to different geological classifications are obtained, systematic classification and induction are carried out on the difference in gas injection effect, and gas injection effects are effectively evaluated, so that a sufficient gas injection scheme design basis is provided for subsequent development and production increase, and a significant guiding principle is provided for later-stage gas injection and production increase of the carbonate reservoir.
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Patent Agency Ranking
公开(公告)号：US12163905B2
公开(公告)日：2024-12-10
申请号：US18167712
申请日：2023-02-10
Applicant: Southwest Petroleum University
Inventor： Ping Guo , Zheng Gu , Shuoshi Wang , Zhouhua Wang , Qinglong Xu , Shiyong Hu , Wenhua Zhao , Yisheng Hu , Huang Liu , Hanmin Tu
Abstract: A method for determining a phase-state type and saturation of a fluid by an NMR technology includes putting a core to be measured to an NMR phase-state testing device, injecting a heavy water solution from both ends of a gripper at the same time until the core reaches the formation pressure, and stopping; scanning the core to obtain a two-dimensional NMR map, and determining whether the core contains a gas phase; reducing the temperature of the gripper, and collecting an oil phase volume, a gas phase volume and a water phase volume discharged from the core; purge the pipelines out with nitrogen, collecting a water phase volume and an oil phase volume in the pipelines; performing dry distillation on the core to obtain an oil phase volume and a water phase volume; and obtaining the saturations of various phases according to the fluid volumes of multiple phases in the core.
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公开(公告)号：US12092558B1
公开(公告)日：2024-09-17
申请号：US18678292
申请日：2024-05-30
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Zhouhua Wang , Hanmin Tu , Xintong Zhang , Ping Guo , Shuoshi Wang , Huang Liu , Zhicheng Yang , Xingliang Deng , Zhiliang Liu , Yisheng Hu , Hongnan Yang , Ping Le , Tongwen Jiang , Guangya Zhu , Nan Li
CPC classification number: G01N15/0826 , E21B49/087 , G01N2203/0044
Abstract: The present invention discloses a gas based testing method for a pore volume compressibility of a low-permeability rock. The method comprises the following steps: obtaining a compressibility and an isothermal adsorption-desorption curve of experimental gas under a reservoir condition; performing a physical simulation experiment by using a steel core drilled with a through hole, and obtaining a gas volume collected due to the deformation of an experimental instrument; then repeating the experiment by using an actual core with the same size, and obtaining pore volumes of the reservoir core under the experimental conditions by deducting deformation of the instrument; and finally, obtaining a pore compressibility of the reservoir core under different reservoir conditions according to the pore volumes of the reservoir core under different reservoir conditions. The present invention considers gas adsorption, corrects errors caused by deformation of a physical simulation device.
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公开(公告)号：US11668191B2
公开(公告)日：2023-06-06
申请号：US17394071
申请日：2021-08-04
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Ping Guo , Zhouhua Wang , Yijian Chen , Bowen Sun , Chao Dong , Yisheng Hu , Shuoshi Wang
CPC classification number: E21B49/088 , E21B49/005 , E21B49/0875 , G01N30/02 , G01N33/241 , G01N33/2823 , E21B2200/20 , G01N2030/025
Abstract: A device for testing the three-phase saturation of oil, gas and water in a high-temperature and high-pressure planar model includes a displacement pump, a confining pressure pump, a back pressure pump, containers, a planar model system, a data acquisition system, a back pressure valve and an oil-gas separator. The planar model system includes a planar model, an autoclave body, a heating temperature-controlling system, a Y-axis direction stepping motor, a X-axis direction stepping motor and an acoustoelectric detector. A method for testing the three-phase saturation of oil, gas and water by using the device includes calibrating three-phase saturation of oil, gas and water to a rock core, preparing a formation water sample and a crude sample, regaining the original formation conditions of the planar model, simulating the depletion or displacement process of oil reservoirs, performing linear ultrasonic-and-resistivity-scanning test on planar model, determining the three-phase saturation distribution of oil, gas and water.
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公开(公告)号：US10364184B2
公开(公告)日：2019-07-30
申请号：US15749780
申请日：2017-02-14
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Ping Guo , Shuai Wu , Yijian Chen , Huimin Zhang , Wanbo Zhang , Yuhong Du , Zhouhua Wang , Jianfen Du , Yisheng Hu , Huang Liu , Hongmei Ren
IPC: C04B20/10 , C04B28/04 , C04B14/04 , C04B40/00 , G01N1/28 , C04B14/06 , B28B7/38 , C04B111/00 , C09K8/46
Abstract: A manufacturing method of a big-model low-permeability microcrack core includes: (1) determining the size of a microcrack core to be manufactured; (2) placing stones in a baking oven to bake for 24h under 120° C., placing the stones into a mixer, mixing and spraying oil, enabling the oil to seep into the stone, evenly forming a thin oil film on stone's surface; (3) mixing the oil sprayed stone with quartz sand and cement, adding water to mix evenly to obtain cement paste; (4) spreading butter on core mold's inner surface to form a thin butter film, pouring the cement paste into the core mold to obtain a cement sample; (5) loading confining pressure outside the core according to the requirements of porosity and permeability of the mold to adjust a pore permeability value; (6) obtaining the big-model core with microcrack after the cement sample is dried and formed.
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公开(公告)号：US10100264B2
公开(公告)日：2018-10-16
申请号：US15454801
申请日：2017-03-09
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Jinzhou Zhao , Yanjun Liu , Leilei Jiang , Shouwei Zhou , Mi Zhang , Ping Guo , Guorong Wang , Qingping Li , Zhiqiang Huang
Abstract: The present disclosure provides an experimental loop system for fluidization exploitation of solid-state marine gas hydrate, comprising: four modules, namely a gas hydrate sample large-amount and rapid preparation module, a gas hydrate multi-scale smashing and slurry fidelity transfer module, a gas hydrate slurry pipeline conveying characteristic experiment module, and a data collection and monitoring and safety control module. The gas hydrate experimental loop device provided by the present disclosure may be used for researching the synthesis, decomposition, gas storage rate and phase equilibrium of gas hydrate, and researching the pipeline conveying flow resistance and heat transfer characteristics, and is significant for solving the blockage problem in the gas pipeline conveying process, storage and conveying of the gas hydrate, solid-state fluidization exploitation of the marine gas hydrate and pipeline conveying experimental simulation thereof.
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