Casing Connection Break Detection Through Tubing in Canadian Thermal Projects. Case Study.
- Mohsen Ghanavati (Global New Petro Tec Corp.) | Maxim Volkov (TGT Oilfield Services) | Vener Nagimov (TGT Oilfield Services) | Hamzeh Ali Mohammadi (University of Calgary, Global New Petro Tec Corp.)
- Document ID
- Society of Petroleum Engineers
- SPE Annual Technical Conference and Exhibition, 30 September - 2 October, Calgary, Alberta, Canada
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Petroleum Engineers
- Connection breaks, casing evaluation through tubing
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Production casings of Cyclic Steam Stimulation (CCS) or steam-assisted gravity drainage wells are exposed to significant temperature variations which in many cases resulted in casing breaks in the weakest part which are typically connection joints. The paper focuses on the new downhole logging approach, in monitoring and detecting production casing connection breaks through tubing without requirement for tubing retrieval.
The metal well barriers can be assessed by utilizing electromagnetic (EM) pulse defectoscopy. This is done by running multiple coaxial sensors downhole in tandem. Each sensor generates EM pulse and then records EM decay from surrounding metal tubes. Modeling of recorded EM decay enables precise assessment of metal loss or metal gain in up to four concentric barriers. However, the tool had never been used previously to detect minor defect features as casing breaks through the tubing. To identify casing breaks several yard and field tests have been conducted and new methodologies were developed. The last one included the recognition of specific patterns of raw EM responses, analysis of hole sensors and utilization of data from all coaxial sensors utilized during the downhole survey.
The new approach including downhole EM pulse tools and new data analysis have been implemented to detect casing connection breaks in over a hundred Cyclic Steam Stimulation (CCS) and SteamAssisted Gravity Drainage (SAGD) wells. The paper demonstrates the testing of the application feasibility in a comprehensive yard test and extends to real field examples. All detected breaks were confirmed after tubing removal and were successfully repaired. Paper highlights detection challenges due to different casing connection break types: minor breaks, partial breaks (contrary to fully circumferential), and casing breaks aligned with tubing connections. The technology has helped Operators to fulfil the objectives of connection break detection without tubing removal through a non-intrusive, safe, quick and economical approach.
Today, CSS and SAGD Operators should confirm casing integrity repeatedly prior to each subsequent steam cycle through the time and resource consuming approach of tubing removal and checking the casing integrity mechanically. Utilizing through tubing electromagnetic diagnostics, enables Operators to pick up multiple casing connection breaks in a single run without tubing retrieval.
|File Size||2 MB||Number of Pages||15|
Arsalan A. Ansari, Ziad Libdi, Naeem Khan, Zakum Development Co.; Arthur Aslanyan, Irina Aslanyan, Maxim Volkov, Andrey Arbuzov, Andrey Achkeev, Fathi Shnaib, Ruslan Makhiyanov, TGT Oilfield Services, 2015, Triple-barrier thickness scanning using through-tubing pulsemagnetic logging tool, Abu Dhabi International Petroleum Conference and Exhibition, Abu Dhabi, UAE, 26-28 Oct.
Aslanyan, A.M, Aslanyan, I.Y, Arbuzov, A.A, Zagidullin, B., Al-Rahawi, T.A., Prosvirkin, S., AlAjmi, M.F., Awad, M.O., Sharma, S.S., Das, M. 2014. Time-Domain Magnetic Defectoscopy for Tubing and Casing Corrosion Detection. SPE International Oilfield Corrosion Conference and Exhibition, Aberdeen, Scotland, 12-13 May.
Andrey Alexandrovich Arbuzov (TGT Prime) |V. V. Bochkarev (TGT Prime) |A. M. Bragin (TGT Prime) |Y. S. Maslennikova (TGT Prime) |B. A. Zagidullin (TGT Prime) |A. A. Achkeev (TGT Prime) |R. S. Kirillov (TGT Prime). 2012. SPE Russian Oil and Gas Exploration and Production Technical Conference and Exhibition, 16 18 October, Moscow, Russia
Yugay, H.B.Daghmouni, A.B.Ali, Abu Dhabi Co For Onshore Petroleum Operations Ltd; M. Volkov, S.J. Sparke, TGT Oil and Gas Services. 2017. Field Trial Results for 3rd Barrier Evaluation Using Technology of Individual Electromagnetic Metal Loss Logging Validated by Actual Excavations - 3 Cases. Abu Dhabi International Petroleum Exhibition & Conference, 13 16 November 2017, Abu Dhabi, UAE