541-3014/02 – Well Workover (POS)

Gurantor departmentDepartment of Geological EngineeringCredits3
Subject guarantordoc. Ing. Antonín Kunz, Ph.D.Subject version guarantordoc. Ing. Antonín Kunz, Ph.D.
Study levelundergraduate or graduateRequirementCompulsory
Study languageEnglish
Year of introduction2019/2020Year of cancellation
Intended for the facultiesHGFIntended for study typesFollow-up Master
Instruction secured by
LoginNameTuitorTeacher giving lectures
KLE028 doc. Ing. Martin Klempa, Ph.D.
KUN109 doc. Ing. Antonín Kunz, Ph.D.
Extent of instruction for forms of study
Form of studyWay of compl.Extent
Full-time Credit and Examination 2+1
Part-time Credit and Examination 8+4

Subject aims expressed by acquired skills and competences

The objective of the course is to acquaint students with the operation of production wells and with the requirements for their operation and maintenance. Part of the course is to define the types, extent and frequency of workover on oil, gas and underground gas storage facilities. Further, the course is focused on possible non-plan repairs of wells as well as on modern methods of increasing oil and gas recoverability by means of technical improvement of the well completion. Students will be acquainted with the basic causes of failures at production and injection boreholes and methods of proper workover. For planned operations, they will learn the methodology of allocating the necessary resources and capacities for repair. In the case of unplanned failures, they will learn how to analyse the reasons of the problems and how to solve them. Further, they will be acquainted with methods of liquidation of boreholes and with specific problems in geothermal wells. They acquire elementary information about quality management systems and related risks. Graduates will demonstrate knowledge of standard maintenance, repair and operation of gas and oil wells, knowledge of the necessary technology and maintenance technology for proper well operation. Graduates will demonstrate knowledge of standard workover of gas and oil wells and knowledge of the necessary maintenance technology for proper well operation. Graduates can identify the nature of the problem of given production well, find the root of the failure and actively participate in the design and implementation of technical workover.

Teaching methods

Individual consultations


Oil and gas production and injection boreholes - basic types. Repairs and maintenance - planning of the necessary resources for the continuous operation of oil and gas wells. Drilling rigs for workover operation. Completion of oil and gas wells, production equipment. Causes of damage and reasons of wear of submersible production equipment. Basic types of repairs and basic processes of well maintenance. Methods of improving of the well recovery. Modern methods of repair and maintenance of probes and openings of new mining horizons. Safety regulations and standard operating procedures for oil and gas well workover, emergency plans. Liquidation of boreholes and production wells. Remediation of the impacts of drilling and production activities. Workover design. Specific problems and repair and maintenance requirements for geothermal wells. Quality management systems and management of safety and environmental risks.

Compulsory literature:

PERRIN, D.: Well Completion and Servicing (Oil and Gas Field Development Techniques). Editions Technips; 1St Edition edition (August 30, 1999). ISBN-10: 2710807653, ISBN-13: 978-2710807650. CRUMPTON, H.: Well Control for Completions and Interventions. Gulf Professional Publishing 2018, ISBN: 9780081001967, ISBN: 9780081022870. COSSÉ R.. Basics of reservoir engineering, Editions Technip, Paris 1993, ISBN 2-7108-0630-4. LYONS, W., CARTER, T., LAPEYROUSE, N.: Formulas and Calculations for Drilling, Production, and Workover: All the Formulas You Need to Solve Drilling and Production Problems. Gulf Professional Publishing; 4 edition (2015). ISBN-10: 0128034173, ISBN-13: 978-0128034170.

Recommended literature:

GUO, B, LYONS, W, CHALAMBOR, A.: Petroleum Production Engineering. A computer assisted Approach, Elsevier Inc. 2017, ISBN 13: 978-0-7506-8270-1. Bellarby, Jonathan. (2009). Developments in Petroleum Science, Volume 56 - Well Completion Design - Front Matter. Elsevier. Stewart, George. (2012). Wireline Formation Testing and Well Deliverability - Front Matter. PennWell. Satter, Abdus Baldwin, Jim Jespersen, Rich. (2000). Computer-Assisted Reservoir Management - Front Matter. PennWell.

Way of continuous check of knowledge in the course of semester

Active attendance at the lectures. Active attendance at the seminars. Ad hoc presentation as a part of the seminar. Individual or team Seminar paper. Participation in the excursion. Awarding of credit. Examination.


There is no e-learning as a part of the lessons.

Other requirements

The compulsory attendance at the seminars min. 75% per semester. Oral exam with the written preparation.


Subject has no prerequisities.


Subject has no co-requisities.

Subject syllabus:

1. Production and injection oil and gas wells - standard oil and gas deposits, UGS, unconventional gas deposits, geothermal wells. 2. Well workover – planning and cost management. 3. Drilling rigs for workover and services, technical equipment and technologies. 4. Oil and gas wells completion, oil and gas extraction equipment. 5. Causes of damage and reasons of wear of completion of the boreholes. 6. Oil and gas recovery methods – intensification work, chemical methods. 7. Oil and gas recovery methods - intensification work, mechanical-dynamic methods, hydraulic fracturing. 8. Modern methods of repair and maintenance of wells and openings of new production horizons - coil tubing, radial drilling. 9. Safety regulations and standard operating procedures for underground repair of wells, emergency plans and emergency preparedness. 10. Liquidation of wells and boreholes. Remediation of impacts of drilling works and hydrocarbon production activities. 11. Workover design - project preparation, geological part of the project, technical part, examples. 12. Specific problems and requirements for repair and maintenance of geothermal wells - effects of corrosion, temperature, scaling. 13. Quality management systems in general, ISO 9000 standards, revision, dedicated technical equipment - introduction. 14. Security and environmental risk management systems, legal requirements, documentation and records.

Conditions for subject completion

Full-time form (validity from: 2019/2020 Winter semester)
Task nameType of taskMax. number of points
(act. for subtasks)
Min. number of pointsMax. počet pokusů
Credit and Examination Credit and Examination 100 (100) 51
        Credit Credit 33  17
        Examination Examination 67  18 3
Mandatory attendence participation: The compulsory attendance at the seminars min. 75% per semester. Oral exam with the written preparation.

Show history

Conditions for subject completion and attendance at the exercises within ISP: Participation in agreed guided consultations 100%. Processing seminar papers according to the assignment. Presentation of results of seminar papers.

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Occurrence in study plans

Academic yearProgrammeBranch/spec.Spec.ZaměřeníFormStudy language Tut. centreYearWSType of duty
2023/2024 (N0724A290004) Petroleum Engineering P English Ostrava 1 Compulsory study plan
2022/2023 (N0724A290004) Petroleum Engineering P English Ostrava 1 Compulsory study plan
2021/2022 (N0724A290004) Petroleum Engineering P English Ostrava 1 Compulsory study plan
2020/2021 (N0724A290004) Petroleum Engineering P English Ostrava 1 Compulsory study plan

Occurrence in special blocks

Block nameAcademic yearForm of studyStudy language YearWSType of blockBlock owner

Assessment of instruction

2021/2022 Winter