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:
Nov. 21, 2023
Filed:
Mar. 07, 2023
Southwest Petroleum University, Chengdu, CN;
Xiangchao Shi, Chengdu, CN;
Leiyu Gao, Chengdu, CN;
Jianfeng Liu, Chengdu, CN;
Hao Yu, Chengdu, CN;
Yuting Dai, Chengdu, CN;
Xiuping Chen, Chengdu, CN;
Qingling Li, Chengdu, CN;
Shuanggui Li, Chengdu, CN;
Yuming Wang, Chengdu, CN;
Southwest Petroleum University, Chengdu, CN;
Abstract
The present disclosure discloses a method for calculating a safe drilling fluid density in a fractured formation, including the following steps: S, performing image processing to identify a downhole fracture; S, establishing three-dimensional (3D) geological models based on parameters of the downhole fracture, and establishing a drilling wellbore model based on a size and length of a wellbore; S, assigning the model with material parameters, boundary conditions, and upper and lower bounds of an initial drilling fluid density, and calculating accuracy; S, solving the 3D geological models using a 3-dimension distinct element code (3DEC) and determining stability of a well wall; S, determining upper and lower bounds of a drilling fluid density using dichotomy; S, repeating steps Sto S; and S, after set accuracy conditions are reached, saving and outputting the safe drilling fluid density.