THERMAL SCIENCE

International Scientific Journal

SIMULATION AND ANALYSIS OF WELLBORE STABILITY FOR DRILLING WELLS IN DEEP AND COMPLEX FORMATIONS

ABSTRACT
Deep and ultra-deep drilling has become the key direction of oil and gas exploration and development research at the present stage. The density window of deep and complex formations is narrow, and most of the wells drilled are high temperature and high pressure wells, which have a large impact on the density and rheological parameters of drilling fluids and further affect the stabilization state of the wall of the well after the intrusion of drilling fluids into the formation. Therefore, this paper comprehensively applies the knowledge of heat transfer, applied mathematics, and computer science to analyze the temperature change of the whole well section and the change of physical properties parameters of drilling fluids in deep formations, and judging the degree of wall instability by introducing the wellbore yield state parameter, and carrying out the simulation and analysis of wall stability in drilling wells of deep and complex formations, and optimizing the design of the selection of the performance parameters of drilling fluids in the subsequent wells.
KEYWORDS
PAPER SUBMITTED: 2024-08-25
PAPER REVISED: 2024-09-28
PAPER ACCEPTED: 2024-12-05
PUBLISHED ONLINE: 2025-06-01
DOI REFERENCE: https://doi.org/10.2298/TSCI2502515Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 2, PAGES [1515 - 1519]
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2025 Society of Thermal Engineers of Serbia. Published by the VinĨa Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence