The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 2021
Filed:
Sep. 09, 2020
China University of Petroleum (East China), Shandong, CN;
Jian Hou, Qingdao Shandong, CN;
Yunkai Ji, Qingdao Shandong, CN;
Qingjun Du, Qingdao Shandong, CN;
Yongge Liu, Qingdao Shandong, CN;
Kang Zhou, Qingdao Shandong, CN;
Yueliang Liu, Qingdao Shandong, CN;
Bei Wei, Qingdao Shandong, CN;
Ermeng Zhao, Qingdao Shandong, CN;
Nu Lu, Qingdao Shandong, CN;
Yajie Bai, Qingdao Shandong, CN;
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Shandong, CN;
Abstract
The application relates to the technical field of oil and gas field development, and discloses a correction method and system for a permeability model considering gas hydrate distribution, and a method and system for determining the permeability of the hydrate-bearing porous medium. The correction method includes: calculating a water mass and a hydrate saturation of each subregion of a porous medium in a dissociation process of a gas hydrate; calculating an average permeability of the porous medium in the dissociation process of the gas hydrate according to the hydrate saturation and a permeability model, wherein a value of a permeability characteristic parameter in the permeability model is an initial value of the permeability characteristic parameter; and determining the initial value of the permeability characteristic parameter as an optimal value of the permeability characteristic parameter under a condition that an difference between the average permeability of the porous medium and an actually measured permeability in the dissociation process of the gas hydrate is less than or equal to a preset value. In the application, through the corrected permeability model, the permeability characteristics of the porous medium considering the heterogeneous distribution of the hydrate can be accurately measured.