<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This article provides a general description of the potential for increasing hydrocarbon production in Ukraine through the restoration of oil and gas wells by drilling sidetracks, based on an analysis of the fields resource potential. The main factors for selecting candidate wells for sidetracking are described. Each stage of well selection set during the design and direct drilling operations is supported by practical results. The main technical and technological solutions for well rehabilitation are described, taking into account the possibility of minimizing the cost of sidetrack drilling. The approaches to selecting and designing a sidetracked well profile are analyzed in detail. The technological scheme for drilling a sidetrack and the layout of the bottom of the drill string are substantiated. An algorithm for calculating the required length of weighted drill pipes and the length of the casing exit for sidetracking is presented. The peculiarities of using drilling fluids for deepening wells with an assessment of the impact on the coefficient of core permeability recovery are presented. The requirements for high-quality well casing are analyzed on the basis of an assessment of the possibility of running the casing in certain areas of sharp changes in the curvature parameters when drilling a well with a small-sized rock-destroying tool. The main functional criteria of the applied buffer systems are characterized and the necessity of using sedimentation-stable dispersion-reinforced grouting systems for high-quality cementing of sidetracks in conditions of small annular gaps is substantiated.</p>
</abstract>

This article provides a general description of the potential for increasing hydrocarbon production in Ukraine through the restoration of oil and gas wells by drilling sidetracks, based on an analysis of the fields resource potential. The main factors for selecting candidate wells for sidetracking are described. Each stage of well selection set during the design and direct drilling operations is supported by practical results. The main technical and technological solutions for well rehabilitation are described, taking into account the possibility of minimizing the cost of sidetrack drilling. The approaches to selecting and designing a sidetracked well profile are analyzed in detail. The technological scheme for drilling a sidetrack and the layout of the bottom of the drill string are substantiated. An algorithm for calculating the required length of weighted drill pipes and the length of the casing exit for sidetracking is presented. The peculiarities of using drilling fluids for deepening wells with an assessment of the impact on the coefficient of core permeability recovery are presented. The requirements for high-quality well casing are analyzed on the basis of an assessment of the possibility of running the casing in certain areas of sharp changes in the curvature parameters when drilling a well with a small-sized rock-destroying tool. The main functional criteria of the applied buffer systems are characterized and the necessity of using sedimentation-stable dispersion-reinforced grouting systems for high-quality cementing of sidetracks in conditions of small annular gaps is substantiated.

Well Rehabilitation is a Promising Area for Increasing Hydrocarbon Production

Ivano-Frankivsk National Technical University of Oil and Gas

Strojnícky časopis - Journal of Mechanical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Well Rehabilitation is a Promising Area for Increasing Hydrocarbon Production"}

This article provides a general description of the potential for increasing hydrocarbon production in Ukraine through the restoration of oil and gas wells by...

Well Rehabilitation is a Promising Area for Increasing Hydrocarbon Production

Published Online: Jun 01, 2024

Page range: 141 - 158

DOI: https://doi.org/10.2478/scjme-2024-0015

Keywords
Well rehabilitation, wellbore profile, directional drilling, casing exit, wedge deflector, well cementing

© 2024 Stanislav Piatkivskyi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Well Rehabilitation is a Promising Area for Increasing Hydrocarbon Production

Published Online: Jun 01, 2024

Page range: 141 - 158

DOI: https://doi.org/10.2478/scjme-2024-0015

KeywordsWell rehabilitation, wellbore profile, directional drilling, casing exit, wedge deflector, well cementing

© 2024 Stanislav Piatkivskyi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Well rehabilitation, wellbore profile, directional drilling, casing exit, wedge deflector, well cementing