Spectral Noise Logging Integrated with High-Precision Temperature Logging for a Multi-Well Leak Detection Survey in South Alberta
- Arthur Aslanyan (TGT Oilfield Services) | Irina Aslanyan (TGT Oilfield Services) | Radhakrishnan Karantharath (TGT Oilfield Services) | Roza Minakhmetova (TGT Oilfield Services) | Hassan Kohzadi (Global New Petro Tec Ltd.) | Mohsen Ghanavati (Global New Petro Tec Ltd.)
- Document ID
- Society of Petroleum Engineers
- SPE Offshore Europe Conference and Exhibition, 8-11 September, Aberdeen, Scotland, UK
- Publication Date
- Document Type
- Conference Paper
- 2015. Society of Petroleum Engineers
- 5 Reservoir Desciption & Dynamics, 7.4 Energy Economics, 7.4.4 Energy Policy and Regulation, 3 Production and Well Operations, 5.1 Reservoir Characterisation, 1.6.11 Plugging and Abandonment, 5.8.3 Coal Seam Gas, 5.8 Unconventional and Complex Reservoirs, 5.1.1 Exploration, Development, Structural Geology, 1.6 Drilling Operations, 7 Management and Information, 3 Production and Well Operations
- leak detection, HPT, Surface Casing Vent Flow, Sustained Anulus Pressure, SNL
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- 226 since 2007
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Gas or fluid ingress into the cement channel and then up to the surface through the surface casing annulus is called Surface Casing Vent Flow (SCVF), which causes Sustained Annulus Pressure (SAP) as a common occurrence in the petroleum industry. Gas may also migrate to the surface outside the outermost casing string, which is often referred to as external Gas Migration (GM) or seepage. In some countries with shallow coal reserves, gas migration sometimes occurs in association with coalbed gas (CBG) development. Dewatering the coal seams or lowered water levels in coal, whether induced by drought or by domestic aquifer pumping, can result in the release of methane and other natural gases in coal (NGC). Hydrocarbon gases released into the atmosphere is an environmental concern. More importantly, leaking fluids may contaminate subsurface fresh-water reservoirs, resulting in a major catastrophe for the environment and human population.
According to the latest statistics, 6% of almost 270 000 operating and idle wells analysed in Alberta were found to contain leaks, 5.5% of them having SCVF and 0.5% gas migration . Operators are bound by the Alberta Energy Regulator (AER) to identify and eliminate leaks and perform remedial operations as outlined in AER's rules and directives.
Even if a well is to be abandoned, the operators must precisely identify the location of the leak and its source to perform a successful plug-and-abandonment (P&A) operation. P&A activities are non-revenue generating activities. The right diagnostic technology is critical for correct leak source identification to eliminate the costs associated with numerous unsuccessful attempts.
The technique of Spectral Noise Logging (SNL) coupled with High Precision Temperature (HPT) Logging have extensively benefited oil industry outside Canada in accurately identifying fluid flow behind multiple casing pipe barriers and in locating leaks and their sources [3–5]. This paper describes two case histories for eight wells in the Western Canadian Sedimentary Basin (WCSB) in South Alberta region for two clients, where application of these techniques enabled gas leak source identification in a series of wells suffering from minute leak rates and also helped to discover some regional lateral flows and cross-flows.
|File Size||12 MB||Number of Pages||23|
Arthur Aslanyan, Reservoir Engineer, TGT, UAE, Irina Aslanyan, Reservoir Engineer, TGT, Oman Christian Demski, Senior Petrophysicist, PDO, Oman, Maryam Al Touqi, Senior Production Technologist, PDO, Oman, ‘Evaluation of water flooding efficiency through the static High Precision Temperature Logging’, paper presented at SPWLA Middle East Regional Symposium, Abu Dhabi, April 15-19, 2007.
Ihab Nabil Mohamed, Mohamed El-Hamawi, Rasheed Ahmad Al Hassan (ADCO, UAE), Arthur Aslanyan, Maxim Filenev, Irina Aslanyan, Jamal Bargouthi (TGT Oil & Gas Services), Bassam Salim (Baker Highes), ‘Leak Detection by Temperature and Noise Logging’, paper SPE 161983-MS presented at Abu Dhabi International Exhibition & Conference, UAE, 11-14 November 2012.
Salim Ghalem, Elyes Draoudi, Ayman Mohamed, Osma Keshta, Amr Mohamed Serry, Ali Al-Felasi, Ahmed Berrim and Hicham Abu Chekr (ADMAOPCO), Maxim Filenev, Alfiya Gabdrakhmanova, Irina Aslanyan and Arthur Aslanyan (TGT Oil & Gas Services), ‘Innovative Noise and High-Precision Temperature Logging Tool for Diagnosing Complex Well Problems’, paper SPE-161712-MS presented at Abu Dhabi International Exhibition & Conference, UAE, 11-14 November 2012.
A.A. Lutfullin, NOVATEK-TARKOSALENEFTEGAZ LLC; A. R. Abdrahimov, NOVATEKJSC; I. N. Shigapov, I. Yu, Aslanyan, A. M. Aslanyan, and R. K. Kuzyutin, TGT Oilfield Services, ‘Identification of Behind-Casing Flowing Reservoir Intervals by the Integrated High-Precision Temperature and Spectral Noise Logging’, paper SPE-171251-MS presented at the SPE Russian Oil and Gas Exploration and Production Technical Conference and Exhibition, Moscow, Russia, 14-16 October 2014.
Schmitz, R. (Husky Oil Operations Ltd.), Cook, T. (Petroleum Industry Training Service), Ericson, G. M. J. (Saskatchewan Energy and Mines), Klebek, M. M. (Alberta Environmental Protection), Robinson, R.S. (Saskatchewan Environment and Resource Management), Van Stempvoort, D.R. (Saskatchewan research Council, ‘A Risk Based Management Approach of The Problem of Gas Migration’, Richardson, Texas: Society of Petroleum Engineers, paper SPE 35849-MS presented at the SPE Health, Safety and Environment in Oil and Gas Exploration and Production Conference, New Orleans, Louisiana, USA, 9-12 June 1996.
K. M. Ravi (Halliburton Services), M. Bosma (Shell International E&P), O. Gastebled (TNO Building and Construction Research), ‘Safe and Economic Gas Wells Through Cement Design for Life of the Well’, paper SPE-75700-MS presented at the SPE Gas Technology Symposium, Calgary, Alberta, Canada, 30 April-2 May, 2002.
Canadian Society for Gas Migration website (http://csgm.ca)
Nelson Suarez, Ademola Otubaga and Nagendra Mehrotra, Dubai Petroleum Establishmen; Arthur Aslanyan, Irina Aslanyan, Murat Khabibullin, Jamal Barghouti and Yulia Maslenikova, TGT Oil and Gas Services. ‘Complementing Production Logging with Spectral Noise Analysis to Improve Reservoir Characterisation and Surveillance’ presented at SPWLA 54th Annual Symposium, New Orleans, Lousiana, USA, June 22-26, 2013.