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A Case Study of Sustained Annulus Pressure Diagnosis in a Newly Drilled High-Pressure Gas Well in SPDC

Authors
Adejoke Adebayo (The Shell Petroleum Development Company of Nigeria) | Olugbenga Daodu (The Shell Petroleum Development Company of Nigeria) | Eric Ezenobi (The Shell Petroleum Development Company of Nigeria) | Olayinka David (The Shell Petroleum Development Company of Nigeria) | Abiodun Laoye (The Shell Petroleum Development Company of Nigeria) | Gbenga Komolafe (The Shell Petroleum Development Company of Nigeria) | Linda Dennar (The Shell Petroleum Development Company of Nigeria) | Somtochi Nwandu (The Shell Petroleum Development Company of Nigeria) | Christabel Chidiebere (The Shell Petroleum Development Company of Nigeria) | Suleiman Ahmed (The Shell Petroleum Development Company of Nigeria) | Ime Uyouko (The Shell Petroleum Development Company of Nigeria)
DOI
https://doi.org/10.2118/198856-MS
Document ID
SPE-198856-MS
Publisher
Society of Petroleum Engineers
Source
SPE Nigeria Annual International Conference and Exhibition, 5-7 August, Lagos, Nigeria
Publication Date
2019
Document Type
Conference Paper
Language
English
ISBN
978-1-61399-691-1
Copyright
2019. Society of Petroleum Engineers
Downloads
4 in the last 30 days
67 since 2007
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SPE Member Price: USD 9.50
SPE Non-Member Price: USD 28.00

Well integrity is a key focus area in any oil and gas development. There have been several cases of well integrity issues which have resulted in scenarios of blowout, loss of lives, assets, and reputation, including costs spent for clean-up and environmental remediation, amongst others. These and more have made the energy industry put a keen focus to making sure all hydrocarbon production and processing facilities are integral, with newer technologies still being developed to aid the diagnosis of well integrity problems.

Well integrity considerations cut across the entire life cycle of the well, from well conceptualization/planning through to drilling, completion, production and abandonment. This case study presents a high-pressure, high temperature gas well with sustained annulus pressure in the early production phase of the well.

Well X is a gas well completed in an elevated pressure and temperature reservoir on a land terrain. The reservoir is about 13000ftss deep, with a temperature of 219°F and a reservoir pressure of 9300psi. The well was completed, cleaned up and brought to production about a year ago and annular pressures were observed.

This paper details the different approaches used in diagnosing the sustained annular pressures – separating thermal effect from sustained pressure due to leak. It shows the different scenarios of leak paths identified and how these were streamlined.

The paper also highlights the integration of data acquired during the investigation. Some of the data acquired include well annuli pressures, high precision temperature logs, spectral noise logs and electromagnetic corrosion logs.

File Size  1 MBNumber of Pages   10

Ihab, N. M., Mohamed, E., Rasheed, A.A., Arthur, A., Maxim, F., Irina, A., Jamal, B., Bassam, S., 2012. ‘Leak detection by temperature and noise logging’. Presented at the Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, UAE, 11-14 November 2012. SPE-161983

Tony Rocha-Valadez, Rashid Hasan, A., Sam Mannan, M., Shah Kabir, C., 2014. ‘Assessing Wellbore Integrity in sustained casing pressure annulus’. SPE Drilling and Completions Vol 29 Issue 01 SPE-169814-PA

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