Chinese Academy of Sciences

Peking University

Ora Corporation

Jianguo Wu

Guoliang Li

Jijin Yang

Wei Lin

Yuan Yuan

Huan Liu

Ye Zhao

Lei Ding

Zhongming Du

Jin Hao

Zhirui Yang

Rongxin Yang

Shengze Yao

Chunhong Wei

Jiajia Han

Xiaofeng Cao

Yongwei Wang

A method for identifying a pore and a fracture based on a two-dimensional (2D) scan image of a core includes: scanning a core to acquire an initial 2D image of the core; filtering the initial 2D image of the core to acquire a first 2D image of the core; segmenting the first 2D image of the core to acquire a second 2D image of the core; extracting center coordinates of all pixel points in each void space to acquire a centroid of the void space, and establishing a pore-fracture identification function of the void space; identifying the void space as a fracture if a value of the pore-fracture identification function is greater than a preset characterization value; and identifying the void space as a pore if the value of the pore-fracture identification function is not greater than the preset characterization value.

Method and system for identifying pore and fracture based on two-dimensional (2D) scan image of core

A classified characterization method for connectivity of organic matter (OM)-hosted pores in shale includes: scanning a shale sample according to a preset imaging area through a scanning electron microscope to acquire a 2D image of the shale sample; extracting pore parameters of each OM in the 2D image by Avizo software; acquiring a class number of OM sets according to the pore parameters; performing 3D reconstruction on each class of OM sets through a focused ion beam-helium ion microscope to acquire reconstructed 3D models of the OM; acquiring a pore connectivity parameter by the Avizo software; and acquiring an evaluation index for overall connectivity of the OM-hosted pores in the shale based on the pore connectivity parameter. The classified characterization method is based on the morphologically quantitative classification of the OM-hosted pores, and can realize the 3D characterization of connectivity of pores below 10 nm.

Classified characterization method for connectivity of organic matter (OM)-hosted pores in shale

The present application discloses an application of OsAO gene for improving rice resistance to rice stripe disease, rice black-streaked dwarf disease or other rice or corn virus diseases caused by homologous virus of rice black-streaked dwarf virus. The present application also provides an application of OsAO gene, the protein encoded by the gene or a recombinant vector containing the gene in regulating plant resistance to rice stripe disease, rice black-streaked dwarf disease or other rice and corn virus diseases caused by homologous virus of rice black-streaked dwarf virus, said protein has the amino acid sequence as shown in Seq 4. The experiment proved that the plant disease resistance is increased in rice overexpressing OsAO gene, indicating that the OsAO protein encoded by this gene plays an important role in rice resistance to rice stripe disease and rice black-streaked dwarf disease.

Application of OsAO gene for improving resistance of rice against rice stripe virus, rice black-streaked dwarf virus, or virus of same family

The present disclosure belongs to the field of petroleum exploration and development and, in particular, relates to a system and a method for analyzing while-drilling rock fragments in oil and gas field. The system includes a sample preparation mold and a sample scanning apparatus; the mold is configured to quickly batch prepare fragments into scanning ready samples; the apparatus is portable and configured for batch scanning and analyzing the samples, and having the capabilities of anti-vibration, temperature control, dust prevention, and adaptability to a harsh well site environment; the method includes a scanning step where surface images, elements and mineral types of rock can be rapidly quantitatively analyzed, and lithologies thereof can be identified; the method also includes the analysis step in which rock's elastic parameters and target zone of the vertical well are determined, and geosteering and design of staged fracturing of horizontal well can be provided.

System and method for scanning while-drilling rock fragments in an oil and gas field

An electronic business card information exchange method and device are provided in the present invention. The electronic business card exchange is achieved by way of by way of receiving by a first terminal in a power-off state an induced electric energy provided by a second terminal, sending by the first terminal the first electronic business card information stored locally to the second terminal under the driving of the induced electric energy, then receiving and storing second electronic business card information written by the second terminal. The technical problem in the prior art that the electronic business card information exchange can not be achieved when one of two terminals is in a power-off state is solved.

Electronic business card information exchange method and device

Growing community of inventors

Beijing, China

Jianguo Wu