Assessing Wellbore Integrity in Sustained-Casing-Pressure Annulus
- Tony Rocha-Valadez (Texas A&M University) | A. Rashid Hasan (Texas A&M University) | Sam Mannan (Texas A&M University) | C. Shah Kabir (Hess Corporation)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- January 2014
- Document Type
- Journal Paper
- 131 - 138
- 2014.Society of Petroleum Engineers
- sustained casing pressure, gas migration in annulus, modeling annulus pressure and rate, wellbore safety and integrity
- 34 in the last 30 days
- 1,472 since 2007
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Sustained casing pressure (SCP), exhibited by many wells, is defined as any measurable casing pressure that rebuilds after being bled down, attributable to cause(s) other than artificially applied pressures or temperature fluctuations in the well. Gas leakage, leading to SCP, may occur through the poor cement bond between the casing and the formation, packer, and/or the casing itself. All safety regulators require SCP elimination. However, test-data analysis is mostly qualitative and limited to arbitrary criteria, thereby lacking consensus. This paper attempts to provide a theoretical frame and a model for quantitative analysis of SCP-test data. Specifically, we adapted a model for SCP that is rooted in the transport processes of the system. The model accounts for mud compressibility and assumes gas is leaking into the annulus and migrating up the annular liquid column. Some robust assumptions about the transport processes allow for expressing the governing equation as a first-order, linear differential equation that is solved with appropriate boundary conditions. The resulting algebraic expression for the casing-pressure rise (Annulus A) with time is easy to apply. A comparison of the performance of the model with field data suggests that gas influx causes a casing-pressure (Annulus A) increase in wells.
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Abousleiman, Y., Chang, A. H-D. and Gu, H. 1994. Formation Permeability Determination by Micro or Mini-Hydraulic Fracturing. J. Energy Resour.-ASME 116 (2): 104–114. http://dx.doi.org/10.1115/1.2906014.
Altun, G., Langlinais, J., and Bourgoyne, A.T. Jr. 2001. Application of a New Model To Analyze Leak-Off Tests. SPE Drill & Compl 16 (2): 108–116. http://dx.doi.org/10.2118/72061-PA.
Anders, J.L., Cismoski, D., Daniel, R., et al. 2008. Prudhoe Bay Well P2 15 Surface Casing Collapse. Paper SPE 116771 presented at the SPE Annual Technical Conference and Exhibition, Denver, Colorado, 21–24 September. http://dx.doi.org/10.2118/116771-MS.
American Petroleum Institute. 2006. API RP 90: Annular Casing Pressure Management for Offshore Wells, first edition (August 2006).
Aschehoug, M. and Kabir, C.S. 2013. Real-Time Evaluation of Carbon Dioxide Production and Sequestration in a Gas Field. SPE Res Eval & Eng 16 (2): 134–143. http://dx.doi.org/10.2118/163149-PA.
Azzola, J.H., Tselepidakis, D.P., Pattillo, P.D., et al. 2007. Application of Vacuum-Insulated Tubing to Mitigate Annular Pressure Buildup. SPE Drill & Compl 22 (1): 46–51. http://dx.doi.org/10.2118/90232-PA.
Bellarby, J., Kofoed, S.S. and Marketz, F. 2013. Annular Pressure Build-up Analysis and Methodology with Examples from Multifrac Horizontal Wells and HPHT Reservoirs. Paper SPE 163557 presented at the 2013 SPE/IADC Drilling Conference and Exhibition, Amsterdam, The Netherlands, 5–7 March. http://dx.doi.org/10.2118/163557-MS.
Bourgoyne, A.T Jr., Scott, S.L. and Manowski, W. 2000. A Review of Sustained Casing Pressure Occurring on the OCS, final report submitted to US Department of Interior Minerals Management Service, Washington, D.C.
Bourgoyne Jr., A.T., Scott, S.L. and Regg, J.B. 1999. Sustained Casing Pressure in Offshore Producing Wells. Paper SPE 11029 presented at the Offshore Technology Conference, Houston, Texas, 3–6 May. http://dx.doi.org/10.4043/11029-MS.
D’Alesio, P., Poloni, R., Valente, P., et al. 2011. Well-Integrity Assessment and Assurance: The Operational Approach for Three CO2-Storage Fields in Italy. SPE Prod & Oper 26 (2): 140–148. http://dx.doi.org/10.2118/133056-PA.
Diller, C. 2011. Field-/Well-Integrity Issues, Well-Abandonment Planning, and Workover Operations on an Inadequately Abandoned Well: Peace River, Alberta, Case Study. SPE Drill & Compl 26 (4): 540–549. http://dx.doi.org/10.2118/138287-PA.
Goodwin, K.J. and Crook, R.J. 1992. Cement Sheath Stress Failure. SPE Drill Eng 7 (4): 291–296. http://dx.doi.org/10.2118/20453-PA.
Hasan, A.R., Izgec, B. and Kabir, C.S. 2010. Sustaining Production by Managing Annular-Pressure Buildup. SPE Prod & Oper 25 (2): 195–203. http://dx.doi.org/10.2118/120778-PA.
Huerta, N.J., Checkai, D.A. and Bryant, S.L. 2009. Utilizing Sustained Casing Pressure Analog to Provide Parameters to Study CO2 Leakage Rates Along a Wellbore. Paper SPE 126700 presented at the SPE International Conference on CO2 Capture, Storage, and Utilization, San Diego, California, 2–4 November. http://dx.doi.org/10.2118/126700-MS.
Izgec, B., Cribbs, M.E., Pace, S.V., et al. 2009. Placement of Permanent Downhole-Pressure Sensors in Reservoir Surveillance. SPE Prod & Oper 24 (1): 87–95. http://dx.doi.org/10.2118/107268-PA.
Jackson, P.B. and Murphey, C.E. 1993. Effect of Casing Pressure on Gas Flow Through a Sheath of Set Cement. Paper SPE 25698 presented at the SPE/IADC Drilling Conference, Amsterdam, The Netherlands, 22–25 February. http://dx.doi.org/10.2118/25698-MS.
Kabir, C.S. and Hasan, A.R. 1998. Does Gauge Placement Matter in Downhole Transient-Data Acquisition? SPE Res Eval & Eng 1 (1): 64–68. http://dx.doi.org/10.2118/36527-PA.
Kinik, K. and Wojtanowicz, A.K. 2011. Identifying Environmental Risk of Sustained Casing Pressure. Paper SPE 143713 presented at the SPE Americas E&P Health, Safety, Security, and Environmental Conference, Houston, Texas, 21–23 March. http://dx.doi.org/10.2118/143713-MS.
Loizzo, M., Akemu, O.A.P., Jammes, L., et al. 2011. Quantifying the Risk of CO2 Leakage Through Wellbores. SPE Drill & Compl 26 (3): 324–331. http://dx.doi.org/10.2118/139635-PA.
Oudeman, P. and Kerem, M. 2006. Transient Behavior of Annular Pressure Buildup in HP/HT Wells. SPE Drill & Compl 21 (4): 234–241. http://dx.doi.org/10.2118/88735-PA.
Pestman, W.R. 2009. Mathematical Statistics, second edition. Berlin, Germany: Walter de Gruyter GmbH & Co.
Somei, N. 1992. Mechanisms of Gas Migration after Cement Placement and Control of Sustained Casing Pressure. MS thesis, Louisiana State University, Baton Rouge, Louisiana (1992).
Tao, Q., Checkai, D., Huerta, N., et al. 2010. Model to Predict CO2 Leakage Rates Along a Wellbore. Paper SPE 135483 presented at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 19–22 September. http://dx.doi.org/10.2118/135483-MS.
Tao, Q., Bryant, S.L., Meckel, T.A., et al. 2012. Wellbore Leakage Model for Above-Zone Monitoring at Cranfield, MS. Paper SPE 151516 presented at the Carbon Management Technology Conference, Orlando, Florida, 7–9 February. http://dx.doi.org/10.7122/151516-MS.
Taoutaou, S., Bermea, J.A.V., Bonomi, P., et al. 2011. Avoiding Sustained Casing Pressure in Gas Wells Using Self-Healing Cement. Paper IPTC 14279 presented at the International Petroleum Technology Conference, Bangkok, Thailand, 7–9 February 2012. http://dx.doi.org/10.2523/14279-MS.
Vignes, B. and Aadnoy, B. 2010. Well-Integrity Issues Offshore Norway. SPE Prod & Oper 25 (2): 145–150. http://dx.doi.org/10.2118/112535-PA.
Wang, H., Soliman, M.Y., Shan, Z., et al. 2011. Understanding the Effects of Leakoff Tests on Wellbore Strength. SPE Drill & Compl 26 (4): 531–539. http://dx.doi.org/10.2118/132981-PA.
Watson, T.L. and Bachu, S. 2009. Evaluation of the Potential for Gas and CO2 Leakage Along Wellbores. SPE Drill & Compl 24 (1): 115–126. http://dx.doi.org/10.2118/106817-PA.
Wojtanowicz, A.K., Nishikawa, S., and Xu, R. 2001. Diagnosis and Remediation of Sustained Casing Pressure in Wells, final report submitted to US Department of Interior Minerals Management Service, Washington, D.C. (July 2001).
Xu, R. and A.K. Wojtanowicz. 2001. Diagnosis of Sustained Casing Pressure from Bleed-off/Buildup Testing Patterns. Paper SPE 67194 presented at the SPE Production and Operations Symposium, Oklahoma City, Oklahoma, 24–27 March. http://dx.doi.org/10.2118/67194-MS.
Xu, R. 2002. Analysis of Diagnostic Testing of Sustained Casing Pressure in Wells. PhD dissertation, Louisiana State University, Baton Rouge, Louisiana (2002).