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Application of Noise and High Precision Temperature Logging Technology to Detect Tubing Leak in an Oil Well - A Case Study

Authors
Shiv Narayan Jalan (Kuwait Oil Company) | Saud Al-Haddad (Kuwait Oil Company) | Shareefa Mulla Ali (Kuwait Oil Company) | Dalal Al-Hamli (Kuwait Oil Company) | Sergey Prosvirkin (TGT Oilfield Services) | Sergey Aristov (TGT Oilfield Services)
DOI
https://doi.org/10.2118/187668-MS
Document ID
SPE-187668-MS
Publisher
Society of Petroleum Engineers
Source
SPE Kuwait Oil & Gas Show and Conference, 15-18 October , Kuwait City, Kuwait
Publication Date
2017
Document Type
Conference Paper
Language
English
ISBN
978-1-61399-534-1
Copyright
2017. Society of Petroleum Engineers
Disciplines
5 Reservoir Desciption & Dynamics, 2.10 Well Integrity, 5.4 Improved and Enhanced Recovery, 2.1.3 Completion Equipment, 2 Well completion
Keywords
Well Integrity, HPT-SNL Technology, Leak Detection
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10 in the last 30 days
94 since 2007
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Abstract

Leak in well bore tubulars & packers leads to communication between tubing/casing or Short/Long strings thus causing enormous production losses in Oil & Gas industry. Moreover, it can cause cross flow between different reservoirs. Sometimes leak may lead to charging of shallow formations thus posing a big threat to well integrity. The detection of the source of communication presents a big challenge to the industry. Knowing the precise location of a leak helps in designing an effective remedial action thus reducing downtime and repair costs.

When a fluid leaks, it moves from the high-pressure side through the leak point to the low-pressure side, where it expands rapidly and produces a turbulent flow creating noise and temperature changes. Conventional noise and temperature tools are not capable of detecting the leak point with high confidence. However, the new generation Noise and Temperature logging tools have been able to locate such leaks precisely.

This paper presents successful use of Spectral Noise Logging in combination with High Precision Temperature logging (HPT-SNL) in a dual-completion oil well in Kuwait Oil Company for identifying communication between the long and the short tubing strings. The acoustic tool contains a new-generation, high-sensitivity hydrophone – a piezo crystal element that records noise in a wide frequency range (0.1 – 60 kHz). Temperature tool utilizes a super-sensitive platinum sensor with a response time of less than one second. Leak was detected at the bottom blast joint of the long string that was causing water entry into the short string thus killing the well. The technology can be used in critical oil and gas wells to identify tubing and casing leaks and address well integrity issues. It can also be used in water injection wells to identify the zones of water intake.

File Size  1 MBNumber of Pages   9

Richard J. Davies. Oil and gas wells and their integrity: Implications for shale and unconventional resource exploitation. 2014, Marine and Petroleum Geology Journal

R. Bhagavatula, M.F. Al-Ajmi, M.O. Awad, V.S. Rajagopalan, A.S. El-Daoushy, M.O. Hassan, F.Y. Shnaib, I. Aslanyan, S. Prosvirkin, R. Karantharath. An Integrated Downhole Production Logging Suite for Locating Water Sources in Oil Production Wells. 2015. SPE Oil and Gas India Conference and Exhibition, Mumbai, India, 24–26 November.

Suarez, N., Otubaga, A., Mehrotra, N., Aslanyan, A., Aslanyan, I., Khabibullin, M., Wilson, M., Barghouti, J., Maslennikova, Y. 2013. Complementing production logging with spectral noise analysis to improve reservoir characterization and surveillance. Presented at the SPWLA 54th Annual Symposium, New Orleans, 22–26 June.

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