公开(公告)号：US20190002344A1

公开(公告)日：2019-01-03

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 ,  C04B14/06 ,  C09K8/46 ,  C04B40/00 ,  G01N1/28

CPC classification number: C04B20/1025 ,  B28B7/384 ,  C04B14/04 ,  C04B14/06 ,  C04B28/04 ,  C04B40/0067 ,  C04B2111/00991 ,  C09K8/46 ,  G01N1/286 ,  G01N2001/2866 ,  G01N2001/2893 ,  C04B20/008

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 24 h 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 mould's inner surface to form a thin butter film, pouring the cement paste into the core mould to obtain a cement sample; (5) loading confining pressure outside the core according to the requirements of porosity and permeability of the mould to adjust a pore permeability value; (6) obtaining the big-model core with microcrack after the cement sample is dried and formed.