Stimulation of Seawater Injectors by GLDA (Glutamic-Di Acetic Acid)
- Mohamed Mahmoud (KFUPM) | Khaled Zidan Abdelgawad (KFUPM) | Salaheldin Mahmoud Elkatatny (King Fahd University of petroleum and minerals) | Ahmed Akram (IMSC) | Theo Stanitzek (Akzo Nobel Functional Chemicals, LLC)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- September 2016
- Document Type
- Journal Paper
- 178 - 187
- 2016.Society of Petroleum Engineers
- stimulation, seawater injectors, Non-coiled tubing
- 8 in the last 30 days
- 385 since 2007
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Seawater is injected to maintain the reservoir pressure that supports the oil production from carbonate and sandstone reservoirs. In certain regions, the seawater contains more than 4,000 ppm sulfate, and the formation contains more than 19,000 ppm calcium; this will cause calcium sulfate precipitation at the reservoir conditions. The precipitate at the reservoir conditions will be anhydrite, and it will cause formation damage that will reduce the well injectivity. Stimulation treatments are required to recover the well injectivity; this requires stopping water injection to perform the stimulation treatments, and also it requires flowing back the well after stimulation treatment. In this study, we are proposing a new method that we can use to stimulate water injectors without stopping the water injection. The new method includes adding a chelating agent to the injected seawater at the wellhead at 15 wt% concentration. The fluid will be injected at the surface with the seawater with a specific dose to achieve the required concentration. Several solubility and coreflooding tests were performed with actual carbonate cores and GLDA (glutamic-di acetic acid) chelating agent at different temperatures. The chemical injection does not need coiled tubing and can be injected at the surface with the seawater. The chelating agents will sequester all calcium in solution and will prevent the calcium sulfate precipitation. GLDA chelating agent will be used with seawater, with no need to use treated or fresh water. Also, flowing back the well is not required because the fate of GLDA in the aquifer is soluble. Solubility tests up to 250?F at high pressure showed that the GLDA is stable with seawater. Coreflood experiments and computed- tomography scans showed the ability of GLDA in the creation of dominant wormholes through 6- and 1.5-in. carbonate cores at 212 and 150?F, respectively. GLDA chelating agent can be used to stimulate seawater injectors without additives because this chemical is stable and mild with the well tubulars. Previous corrosion studies on GLDA showed that its corrosion rate is in the allowable range without adding corrosion inhibitors.
|File Size||1 MB||Number of Pages||10|
Ali, A. H. A., Frenier, W. W., Xiao, Z. et al. 2002. Chelating Agent-Based Fluids for Optimal Stimulation of High-Temperature Wells. Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 29 September–2 October. SPE-77366-MS. http://dx.doi.org/10.2118/77366-MS.
Al-Khaldi, M. H., AlJuhani, A., Al-Mutairi, S. H. et al. 2011. New Insights Into the Removal of Calcium Sulfate Scale. Presented at the SPE European Formation Damage Conference, Noordwijk, The Netherlands, 7–10 June. SPE-144158-MS. http://dx.doi.org/10.2118/144158-MS.
Al-Mutairi, S. H., Nasr-El-Din, H. A., Aldriweesh, S. M. et al. 2005. Corrosion Control During Acid Fracturing of Deep Gas Wells: Lab Studies and Field Cases. Presented at the SPE International Symposium on Oilfield Corrosion, Aberdeen, 13 May. SPE-94639-MS. http://dx.doi.org/10.2118/94639-MS.
Bakar, H. B., Xianlung, I. C., M Nadzri, M. Z. et al. 2013. Offshore Field Application of a Low Corrosive Fluid Designed for De-scaling of Well With ESP Completion. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, USA, 30 September–2 October. SPE-166335-MS. http://dx.doi.org/10.2118/166335-MS.
Bowen, W. B., Benkovic, R., Gunningham, M. et al. 2014. Back-flowing of Injection Wells. Presented at the International Petroleum Technology Conference, Doha, 19–22 January. IPTC-17677.
Braun, W., De Wolf, C., and Nasr-El-Din, H. A. 2012. Improved Health, Safety and Environmental Profile of a New Field Proven Stimulation Fluid. Presented at the SPE Russian Oil and Gas Exploration and Production Technical Conference and Exhibition, Moscow, 16–18 October. SPE-157467-MS. http://dx.doi.org/10.2118/157467-MS.
De Wolf, C., Nasr-El-Din, H. A., Bouwman, A. et al. 2012. A New, Low Corrosive Fluid To Stimulate Deep Wells Completed With Cr-based Alloys. Presented at the SPE International Conference and Workshop on Oilfield Corrosion, Aberdeen, 28–29 May. SPE-152716-MS. http://dx.doi.org/10.2118/152716-MS.
Fredd, C. N. and Fogler, H. S. 1997. Chelating Agents as Effective Matrix Stimulation Fluids for Carbonate Formations. Paper presented at the International Symposium on Oilfield Chemistry, Houston, Texas, 18–21 February. SPE-37212-MS. http://dx.doi.org/10.2118/37212-MS.
Fredd, C. N. and Fogler, H. S. 1998a. The Influence of Chelating Agents on the Kinetics of Calcite Dissolution. J. Colloid and Interface Science 204 (1):187–197. http://dx.doi.org/10.1006/jcis.1998.5535.
Fredd, C. N. and Fogler, H.S. 1998b. The Kinetics of Calcite Dissolution in Acetic Acid Solutions. Chemical Engineering Science 53 (22): 3863–3874. http://dx.doi.org/10.1016/S0009-2509(98)00192-4.
Fredd, C. N. and Fogler, H.S. 1998c. The Influence of Transport and Reaction on Wormhole Formation in Porous Media. AIChE J. 44 (9): 1933–1949. http://dx.doi.org/10.1002/aic.690440902.
Frenier, W. W., Fredd, C. N., and Chang, F. 2001. Hydroxyaminocarboxylic Acids Produce Superior Formulations for Matrix Stimulation of Carbonates at High Temperatures. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, USA, 30 September–3 October. SPE-71696-MS. http://dx.doi.org/10.2118/71696-MS.
Frenier, W., Brady, M., Al-Harthy, S. et al. 2004. Hot Oil and Gas Wells Can Be Stimulated Without Acids. SPE Prod & Fac 19 (4): 189–199. SPE-86522-PA. http://dx.doi.org/10.2118/86522-PA.
Kalfayan, L. 2008. Production Enhancement With Acid Stimulation. Tulsa, USA: PennWell Corporation.
LePage, J., De Wolf, C., Bemelaar, J. et al. 2011. An Environmentally Friendly Stimulation Fluid for High-Temperature Applications. SPE J. 16 (1): 104–110.
Mahmoud, M. A., Nasr-El-Din, H. A., LePage, J. N. et al. 2011a. Optimum Injection Rate of a New Chelate That Can Be Used to Stimulate Carbonate Reservoirs. SPE J. 16 (4): 968–980. SPE-133497-PA. http://dx.doi.org/10.2118/133497-PA.
Mahmoud, M. A., Nasr-El-Din, H. A., LePage, J. N. et al. 2011b. Evaluation of a New Environmentally Friendly Chelating Agent for High Temperature Applications. SPE J. 16 (3): 559–574. SPE-127923-PA. http://dx.doi.org/10.2118/127923-PA.
Mahmoud, M. A., Nasr-El-Din, H. A., and DeWolf, C. A. 2011c. Removing Formation Damage and Stimulation of Deep Illitic-Sandstone Reservoirs Using Green Fluids. Presented at the 2011 ATCE, Denver, USA, 30 Oct–2 November. SPE-147395-MS. http://dx.doi.org/10.2118/147395-MS.
Mahmoud, M. A., Nasr-El-Din, H. A., and DeWolf, C. A. 2011d. Novel Environmentally Friendly Fluids to Remove Carbonate Minerals From Deep Sandstone Formations. Presented at the SPE European Formation Damage Conference, Noordwijk, The Netherlands, 7–10 June. SPE-143301-MS. http://dx.doi.org/10.2118/143301-MS.
Mahmoud, M. A. and Nasr-El-Din, H. A. 2012. Modeling of the Flow of Chelating Agents in Porous Media in Carbonate Reservoir Stimulation. Presented at the North Africa Technology Conference and Exhibition, Cairo, Egypt, 20–22 February. SPE-150065-MS. http://dx.doi.org/10.2118/150065-MS.
Mahmoud, M. A. 2014. Evaluating the Damage Caused by Calcium Sulfate Scale Precipitation During Low- and High-Salinity Water Injection. J Can Pet Technol 53 (3): 141–150. SPE-164634-PA. http://dx.doi.org/10.2118/164634-PA.
Mahmoud, M. A. and Nasr El-Din, H. A. 2014a. Challenges During Shallow and Deep Carbonate Reservoirs Stimulation. J. Energy Resources Technology (Transaction of ASME) 137 (1): 012902-1– 012902-8. http://dx.doi.org/10.1115/1.4028230.
Mahmoud, M. A. and Nasr El-Din, H. A. 2014b. Modeling Flow of Chelating Agents During Stimulation of Carbonate Reservoirs. Arabian J. Science and Engineering 39 (12): 9239–9248.
Martin, A. E. and Calvin, M. 1952. Chemistry of the Metal Chelate Compounds, Chap. 10, 471–516. Englewood Cliffs, New Jersey: Prentice-Hall Chemistry Series, Prentice-Hall.
Nasr-El-Din, H. A., de Wolf, C. A., Stanitzek, T. et al. 2013. Field Treatment to Stimulate a Deep, Sour, Tight-Gas Well Using a New, Low Corrosion and Environmentally Friendly Fluid. SPE Prod & Oper 28 (3): 277–285. SPE-163332-PA. http://dx.doi.org/10.2118/163332-PA.
Nasr-El-Din, H. A., Dana, H., Tomos, V. et al. 2015, Field Treatment To Stimulate an Oil Well in an Offshore Sandstone Reservoir Using a Novel, Low-Corrosive, Environmentally Friendly Fluid. J Can Pet Technol 54 (5): 289–297. SPE-168163-PA. http://dx.doi.org/10.2118/168163-PA.
Obode, Elizabeth I. 2014. The Use of Glutamic Diacetic Acid (GLDA) and Boiling Liquid Expanding Vapour Explosion (BLEVE) in Tight Gas Recovery. Presented at the SPE Nigeria Annual International Conference and Exhibition, Lagos, Nigeria, 5–7 August. SPE-172390-MS. http://dx.doi.org/10.2118/172390-MS.
OECD. 1992. Test No. 301: Ready Biodegradability, OECD Guidelines for the Testing of Chemicals, Section 3, OECD Publishing, Paris. http://dx.doi.org/10.1787/9789264070349-en.
Wang, Y., Hill, A. D., and Schechter, R. S. 1993. The Optimum Injection Rate for Matrix Acidizing of Carbonate Formations. Presented at the 1993 Annual Technical Conference and Exhibition, Houston, USA, 3–6 October. SPE-26578-MS. http://dx.doi.org/10.2118/26578-MS.
Williams, B. B., Gidley, J. L., and Schechter, R. S. 1979. Acidizing Fundamentals, Monograph Series, Chap. 2, 5–9. Richardson, Texas: SPE.