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Numerical Analysis of Residual Strength in the Perforated Casing of Ultra Deep Wells

Yanxian Wu1, Shouming Zhong1, Zhigang Guan1, Lin Song1, Kun Li2, Jiarui Sun2, Yuqiang Xu2,*, Maochuan Tu3, Chaobin Fan3, Jinbin Yang4
1 Engineering Technology Research Institute of Petro China Xinjiang Oilfield Company, Karamay, 834000, China
2 School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China
3 SINOPEC Xinan Oilfield Service Corporation, Deyang, 618000, China
4 SINOPEC Southwest China Oil & Gas Company, Chengdu, 610041, China
* Corresponding Author: Yuqiang Xu. Email:
(This article belongs to this Special Issue: Dynamics and Materials Processing in Petroleum Engineering)

Fluid Dynamics & Materials Processing 2023, 19(1), 261-271. https://doi.org/10.32604/fdmp.2023.020076

Received 02 November 2021; Accepted 22 December 2021; Issue published 02 August 2022

Abstract

A three-dimensional model for the numerical simulation of casing-cement behavior is used to investigate residual strength in the perforated casing of ultra deep wells. The influence of the hole diameter, hole density and phase angle on the residual strength of the casing under non-uniform stress and fracturing conditions is revealed through the consideration of different perforation parameters. It is shown that the residual strength of the casing increases with the hole diameter and periodically changes with the hole density; the phase angle is the main factor that affects the residual strength of the perforated casing, and the perforation should be avoided in the direction of the minimum principal stress to reduce stress concentration at the perforation hole. Moreover, as shown by a companion orthogonal experiment, the descending order of influence of the different influential parameters is: phase angle, hole diameter, hole density and the thickness of casing.

Keywords

Perforated casing; non-uniform stress; residual strength; orthogonal experiment

Cite This Article

Wu, Y., Zhong, S., Guan, Z., Song, L., Li, K. et al. (2023). Numerical Analysis of Residual Strength in the Perforated Casing of Ultra Deep Wells. FDMP-Fluid Dynamics & Materials Processing, 19(1), 261–271.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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