THE INFLUENCE OF WELLBORE AND BIT DIAMETER RATIO ON MINIMUM RADIUS PARAMETERS AND CHANGES IN WELLBORE DEVIATION ANGLE
Saduakassov D.S. Tabylganov M.T. Togasheva A.R. Zholbasarova A.T. Bayamirova R.U.
November-December 2024National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2024#2024-November-DecemberIssue 6126 - 140 pp.
This study investigates the influence of the wellbore and bit diameter ratio on parameters of wellbore deviation, such as the minimum curvature radius and the angle of deviation change. The application of refined mathematical models allowed for detailing the impact of wellbore diameter changes with an accuracy up to 15% and 43% more than predicted by standard models. Errors in modeling deviation parameters can lead to serious consequences, including increased drilling costs and decreased production efficiency. New models accounting for real conditions will help reduce the likelihood of such errors. The aim of the article is to develop a refined mathematical model for accurately predicting the minimum bending radius and bending angle of wells, taking into account the measured well dimensions and specific drilling conditions. The methodology involves analyzing data on curvature radius and deviation angle depending on changes in wellbore diameter. The models were validated on two wells with different conditions. For well A (with a diameter Dc=235 mm, D=214 mm) and well B (with a diameter Dc=235 mm, D=190 mm), the following values were obtained: minimum curvature radii were 3024 m and 3752 m respectively, significantly exceeding values obtained by the standard model (2615 m). Results and Conclusions: Enhanced models allowed for more accurate determination of wellbore minimum curvature radii: 3024 m for well A and 3752 m for well B, representing a 15% and 43% increase compared to predicted standard models (2615 m). The deviation angle for well A was 19°, 13% less than predicted by the standard model (219°).
deviation angle , drill bit , enlargement coefficient , minimum curvature radius , turbodrill , wellbore diameter
Text of the article Перейти на текст статьи
Departments “Petrochemical Engineering”, S.Yessenov Caspian University of Technologies and Engineering, Aktay, Kazakhstan
Departments “Petrochemical Engineering”
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026