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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
发明人： Yisheng Hu , Xuan Bai , Ping Guo , Jianfen Du , Zhouhua Wang , Huang Liu
摘要： 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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公开(公告)号：US11668191B2
公开(公告)日：2023-06-06
申请号：US17394071
申请日：2021-08-04
发明人： Ping Guo , Zhouhua Wang , Yijian Chen , Bowen Sun , Chao Dong , Yisheng Hu , Shuoshi Wang
CPC分类号： E21B49/088 , E21B49/005 , E21B49/0875 , G01N30/02 , G01N33/241 , G01N33/2823 , E21B2200/20 , G01N2030/025
摘要： 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
发明人： Ping Guo , Shuai Wu , Yijian Chen , Huimin Zhang , Wanbo Zhang , Yuhong Du , Zhouhua Wang , Jianfen Du , Yisheng Hu , Huang Liu , Hongmei Ren
IPC分类号： C04B20/10 , C04B28/04 , C04B14/04 , C04B40/00 , G01N1/28 , C04B14/06 , B28B7/38 , C04B111/00 , C09K8/46
摘要： 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：US12092558B1
公开(公告)日：2024-09-17
申请号：US18678292
申请日：2024-05-30
发明人： 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分类号： G01N15/0826 , E21B49/087 , G01N2203/0044
摘要： 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：US10746638B2
公开(公告)日：2020-08-18
申请号：US15775391
申请日：2016-12-02
发明人： Ping Guo , Shuai Wu , Wanbo Zhang , Yisheng Hu , Yijian Chen , Huimin Zhang , Zhouhua Wang , Jianfen Du , Huang Liu , Hongmei Ren
摘要： 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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