Assessment of the Risks and Challenges Encountered During Well Clean Up and Test on Niger Delta Gas Wells - Based on Practical Experience on Cases
Petroleum Science and Engineering
Volume 2, Issue 2, December 2018, Pages: 60-68
Received: Sep. 30, 2018;
Accepted: Oct. 22, 2018;
Published: Dec. 25, 2018
Views 593 Downloads 53
Nnaemeka Princewill Ohia, Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria
Charley Iyke Anyadiegwu, Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria
Chukwuemeka Muonagor, Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria
In this work, the risks, non-technical and operational challenges encountered during well clean up and test on Niger Delta gas wells are assessed based on practical experience on four gas wells worked on by the authors. Previous works on general challenges and improvements in well clean up and tests were consulted, which formed the bedrock of this review paper. The reservoir and wells worked on are described. The reservoir is a non-associated gas reservoir in one of the Niger Delta fields. The challenges faced in the course of the cleanup and well test services on the four gas wells are presented in section 3 of the work. These challenges include issues of safety onsite; logistics management; commercial/contractual challenges and operational challenges like coiled tubing (CT) breakdown, CT inability to get to targeted depths, etc. The recommended and adopted solutions to the challenges are presented in section 4 of the work. The entire section 5 is a robust assessment of risks in gas well clean up and test operations. Risks probability, impact, consequences and mitigation methods are presented in Tables 1 to 5 of this section. Adhering to the recommended solutions and mitigation methods for the challenges and the risks illustrated in this work, would help eliminate downtime and unwanted happenings in the course of gas well clean up and test thereby making operations very successful.
Nnaemeka Princewill Ohia,
Charley Iyke Anyadiegwu,
Assessment of the Risks and Challenges Encountered During Well Clean Up and Test on Niger Delta Gas Wells - Based on Practical Experience on Cases, Petroleum Science and Engineering.
Vol. 2, No. 2,
2018, pp. 60-68.
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Hans-Heinrich W., Grit L., Cimic M., Matthias H., Gerhard H. and Eric T. (2002). A Method for Real-Time Well Clean-up Optimization. SPE-77409-MS. Society of Petroleum Engineers. SPE Annual Technical Conference and Exhibition, 29 September – 2 October, San Antonio, Texas.
Society of Petroleum Engineers (2018). Well Cleanup. Glossary. Petrowiki. Retrieved 31 July, 2018, https://petrowiki.org.
Schlumberger Limited (2018). Well Cleanup. SLB Oilfield Glossary. Retrieved 31 July, 2018, www.glossary.oilfield.slb.com.
Archer (2018). Tornar Wellbore Cleaning Technology – Clean and Solids-Free Wellbore. Well Cleaning. Retrieved 31 July, 2018, archerwell.com.
General Electric (2018). Wellbore Cleanup: Mitigate Operational Risks and Associated Nonproductive Time with Improved Wellbore Cleanup. Retrieved 31 July, 2018, www.bhge.com.
Fleming A. J. A. and Appleby R. (2006). Wellbore Clean up Best Practices: A North Sea Operator's Experience. SPE-101967-MS. Society of Petroleum Engineers. SPE/IADC Indian Drilling Technology Conference and Exhibition, 16-18 October, Mumbai, India.
Abu A. F. S., Fadaq A. S., Kikuchi S., Al Attas M. O., El Housani H., Morrison E. and Malash K. (2002). The Challenge of Improving Water Quality Prior to Discharge to the Sea During Well Clean Up and Testing Operations by the Rig/Barge. SPE-78553-MS. Society of Petroleum Engineers. Abu Dhabi International Petroleum Exhibition and Conference, 13-16 October, Abu Dhabi, United Arab Emirates.
Onyeanuna C. and Marpaung F. (2011). Field Case Deepwater Development Wells Clean-up and Testing. SPE-150765-MS. Society of Petroleum Engineers. Nigeria Annual International Conference and Exhibition, 30 July - 3 August, Abuja, Nigeria.
Lafontan J., Mohamed H. N. H., Osuji-Bells G. A., Khaira K., Ismail M. R. and Khalid M. Z. (2013). Integrated Solution for Underbalanced Perforation and Wellbore Clean Up as an Alternative Methodology. SPE-165463-MS. Society of Petroleum Engineers. SPE Heavy Oil Conference-Canada, 11-13 June, Calgary, Alberta, Canada.
Mollayev E., Javaid M., Gill G., Johnston M., Schwarz F., Elghamry M., Huseynove R., Runchey M. and Gros T. (2017). Innovative Completion Clean-Up Design and Execution for Shah Deniz Stage 2 Development Project. SPE-189003-MS. Society of Petroleum Engineers. SPE Annual Caspian Technical Conference and Exhibition, 1-3 November, Baku, Azerbaijan.
Fischer C. (2018). The Real World isn't Perfect: An Investigation into Wellbore Clean-Up with Non-Uniform Filtercake Exposure. SPE-189500-MS. Society of Petroleum Engineers. SPE International Conference and Exhibition on Formation Damage Control, 7-9 February, Lafayette, Louisiana, USA.
Dimude M., Wane B. and Lu H. (2018). Knarr Field - Optimization of Wellbore Clean-Up Through Dynamic Transient Modeling. SPE-189623-MS. Society of Petroleum Engineers. IADC/SPE Drilling Conference and Exhibition, 6-8 March, Fort Worth, Texas, USA.
Pietrangeli G., Quintero L., Jones T. A., Benaissa S., Menezes C. A., Aubry E., Poitrenaud H. and Furgier J. N. (2014). Overcoming Wellbore Cleanup Challenges in Deepwater Wells in West Africa. SPE-168215-MS. Society of Petroleum Engineers. SPE International Symposium and Exhibition on Formation Damage Control, 26-28 February, Lafayette, Louisiana, USA.