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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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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：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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