China University of Petroleum

Qingdao Haier Joint Stock Co., Ltd.

Qingdao Haier Special Refrigerator Co., Ltd.

Qingdao Haier Air Conditioner Gen Corp., Ltd.

Ke Wang

Jianru Liu

Jie Liu

Haibo Tao

Jun Yao

Xin Wang

Yongfei Yang

Shengyuan Nie

Haiyuan Yang

Qianfei Lv

Yingwen Li

Ning Wu

Liu Tao

Wenjie Zhang

Xinze Li

Zhihui Liu

Pengfei Liu

Benhua Hao

Ruzhen Cheng

Luming Du

Cunheng Li

A method and system for determining contact angles of porous media, including: in a displacement simulation experiment, injecting a displacement fluid into a actual core sample, and performing computed tomography scanning on the core to determine three-dimensional images at different oil displacing time points; segmenting different phases of the three-dimensional images to obtain segmented three-dimensional images; marking a contact line between different phases according to the segmented three-dimensional images, where the phases are underground fluids or displacement fluids and a rock matrix in the displacement simulation experiment; and determining a contact angle of the porous media at different 3D positions at different time points according to the contact line. The method and system provided can obtain the dynamic changing process of the contact angle at different 3D positions in the core at different displacement time points, reflect the wettability of the real reservoir environment more accurately.

Method and system for determining contact angle of porous media

The present invention relates to a refrigerator and a control method thereof. The present invention provides a refrigerator, comprising: a storage compartment; a refrigeration air passage configured to supply refrigeration air and comprising one or more refrigeration air outlets connected with the storage compartment such that a part or all of the refrigeration air in the refrigeration air passage is blown to the storage compartment via the one or more refrigeration air outlets; and a local air passage configured to receive refrigeration air from the refrigeration air passage and blow the received refrigeration air to a local area of the storage compartment in a concentrated manner. In addition, this invention also provides a control method of a refrigerator.

Refrigerator and control method thereof

Growing community of inventors

Qingdao, China

Ke Wang