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.

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

IPC: G01N15/08 ,  G01N1/36 ,  G01N33/24 ,  G01N1/28

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.