Modeling of Geochemical Reactions Occurring in the Gyda Field Under Cold-Seawater Injection on the Basis of Produced-Water-Chemistry Data and Implications for Scale Management
- Yisheng Hu (Southwest Petroleum University) | Eric Mackay (Heriot-Watt University)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- November 2017
- Document Type
- Journal Paper
- 449 - 468
- 2017.Society of Petroleum Engineers
- Produced water chemistry data, Goechemical model, Brine mixing, Mineral reaction, Temperature effect
- 2 in the last 30 days
- 224 since 2007
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The evidence from the produced-brine chemistry suggests that the Gyda field has experienced a variety of geochemical reactions caused by the high temperature and initial calcium (Ca) concentration, and so it is worth reviewing the produced-water data set and studying what in-situ geochemical reactions may be taking place.
Produced-brine-chemistry data from 16 wells in the Gyda field are plotted and analyzed in combination with general geological information and the reservoir description. A 1D reactive-transport model is developed to identify the possible geochemical reactions occurring within the reservoir triggered by seawater injection, and then extended with the inclusion of thermal modeling and also to be a 2D vertical-cross-section model.
Three possible classes of formation-water composition in different regions of the Gyda field have been identified by analysis of the produced-water data set. Anhydrite and barite precipitation are the two dominant mineral reactions taking place deep within the reservoir. Magnesium (Mg) stripping may be a result of multicomponent ion exchange (MIE), dolomite precipitation, or a combination of both. Reservoir temperature is lowered during coldwater injection. The solubility of anhydrite increases at lower temperature, and anhydrite will gradually dissolve in response to the movement of the temperature front, which is much slower than the formation/injection-water mixing front. The extent of mineral precipitation within the reservoir can be reduced by the heterogeneity; the modeling shows that the extent of ion stripping caused by mineral reactions in the reservoir is greatest when simulating a single uniform layer. Brine mixing and the occurrence of geochemical reactions caused by vertical mixing are not observable, even when assigning a high vertical permeability in a heterogeneous model.
Thermal modeling is included to evaluate the effect of nonisothermal processes and heat transport on the geochemical reactions, especially the anhydrite mineral reaction. We have investigated how the difference in horizontal permeability in the two layers affects brine mixing of formation and injection water and geochemical reactions.
|File Size||2 MB||Number of Pages||20|
Al Mayshi, N., Snippe, J., Rucci, F. et al. 2012. Water Injection Subsurface Challenges and Reactive Transport Modelling. Presented at the SPE EOR Conference at Oil and Gas West Asia, Muscat, Oman, 16–18 April. SPE-154457-MS. https://doi.org/10.2118/154457-MS.
Blounot, C. W. and Dickson, F. W. 1969. The Solubility of Anhydrite (CaSO4) in NaCl-H2O From 100 to 450°C and 1 to 1,000 bars. Geochimica et Cosmochimica Acta 33 (2): 227–245. https://doi.org/10.1016/0016-7037(69)90140-9.
Computer Modelling Group (CMG). 2014. GEM, Compositional & Unconventional Simulator, http://www.cmgl.ca/gem.
Dai, Z., Shi, W., Kan, A. T. et al. 2014. Improvement of Thermodynamic Modelling of Calcium Carbonate and Calcium Sulphates at High Temperature and High Pressure in Mixed Electrolytes. Presented at the SPE International Oilfield Scale Symposium, Aberdeen, 14–15 May. SPE-169786-MS. https://doi.org/10.2118/169786-MS.
Fu, Y., Van Berk, W., and Schulz, H.-M. 2012. Hydrogeochemical Modelling of Fluid-Rock Interactions Triggered by Seawater Injection Into Oil Reservoirs: Case Study Miller Fields (UK North Sea). Applied Geochemistry 27 (6): 1266–1277. https://doi.org/10.1016/j.apgeochem.2012.03.002.
Fu, Y., Berk, W. V., and Schulz, H. M. 2013. Temporal and Spatial Development of Scale Formation: One-Dimensional Hydrogeochemical Transport Modelling. Journal of Petroleum Science and Engineering 112: 273–283. https://doi.org/10.1016/j.petrol.2013.11.014.
Gomes, R. M., Mackay, E. J., Deucher, R. H. et al. 2012. Impact of Reservoir Reactions on Thermodynamic Scale Predictions. Presented at the SPE International Conference and Exhibition on Oilfield Scale, Aberdeen, 30–31 May. SPE-155255-MS. https://doi.org/10.2118/155255-MS.
Hardie, L. A. 1967. The Gypsum-Anhydrite Equilibrium at One Atmosphere Pressure. The American Mineralogist 52: 171–200.
Houston, S. J., Yardley, B. W. D, Smalley, P. C. et al. 2006. Precipitation and Dissolution of Minerals During Waterflooding of a North Sea Oil Field. Presented at the SPE International Oilfield Scale Symposium, Aberdeen, 30 May–1 June. SPE-100603-MS. https://doi.org/10.2118/100603-MS.
Hu, Y., Ishkov, O., and Mackay, E. J. 2016. Predicted and Observed Evolution of Produced Brine Compositions, and Implications for Scale Management. SPE Prod & Fac 31 (3): 270–279. SPE-169765-PA. https://doi.org/10.2118/169765-PA.
Hu, Y. and Min, C. 2016. Identification and Modelling of Geochemical Reactions Occurring Within the Sandstone Reservoir Flooded by Seawater. Petroleum Science and Technology 34 (17–18): 1595–1601. https://doi.org/10.1080/10916466.2016.1198807.
Kaasa, B. 1998. Prediction of pH, Mineral Precipitation and Multiphase Equilibria During Oil Recovery. IUk-PhD thesis, The Norwegian University of Science and Technology, Trondheim, Norway.
Mackay, E. J. and Graham, G. M. 2002. The Use of Flow Models in Assessing the Risk of Scale Damage. Presented at the SPE International Symposium Oilfield Chemistry, Houston, 20–21 February. SPE-80252-MS. https://doi.org/10.2118/80252-MS.
Mackay, E. J. 2003. Modelling of In-Situ Scale Deposition: The Impact of Reservoir and Well Geometries and Kinetic Reaction Rates. SPE Prod & Fac 18 (1): 45–56. SPE-81830-PA. https://doi.org/10.2118/81830-PA.
Mackay, E. J., Jordan, M. M., and Torabi, F. 2003. Predicting Brine Mixing Deep Within the Reservoir, and the Impact on Scale Control in Marginal and Deepwater Developments. SPE Prod & Fac 18 (3): 210–220. SPE-85104-PA. https://doi.org/10.2118/85104-PA.
Mackay, E. J., Sorbie, K. S., Kavle, V. et al. 2006. Impact of In-Situ Sulphate Stripping on Scale Management in the Gyda Field. Presented at the SPE International Symposium on Oilfield Scale, Aberdeen, 30 May–1 June. SPE-100516-MS. https://doi.org/10.2118/100516-MS.
Mackay, E. J., Jordan, M. M., Ishkov, O. et al. 2014. Reservoir Simulation, Ion Reactions, and Near-Wellbore Modelling To Aid Scale Management in a Subsea Gulf of Mexico Field. SPE Prod & Fac 29 (3): 172–182. SPE-168439-PA. https://doi.org/10.2118/168439-PA.
McCartney, R. A., Williams, J. C., and Coghlan, G. P. 2005. Processes Determining the Composition of Produced Water From Subsea Fields and Implications for Scale Management—Birch Field, UKCS. Presented at the SPE International Symposiumon Oilfield Scale, Aberdeen, 11–12 May. SPE-94869-MS. https://doi.org/10.2118/94869-MS.
McCartney, R. A., Melvin, K., Wright, R. et al. 2007. Seawater Injection Into Reservoirs With Ion Exchange Properties and High Sulphate Scaling Tendencies: Modelling of Reactions and Implications for Scale Management, With Specific Application to the Gyda Field. Prepared for the 18th International Oilfield Chemistry Symposium, Geilo, Norway, 26–28 March.
McCartney, R. A. 2008. Conditions Under Which Anhydrite Precipitation Can Occur in Oil Reservoirs as a Result of Seawater Injection. Prepared for the 19th International Oilfield Chemistry Symposium, Geilo, Norway, 9–12 March.
McCartney, R. A., Tjomsland, T., Sandøy, B. et al. 2012. Application of Multi-Rate Well Tests (MRT) to Scale Management. Part 1: Interpretation of Produced Water Analyses. SPE Prod & Fac 27: 211–222. SPE-131011-PA. https://doi.org/10.2118/131011-PA.
Meister, P., Reyes, C., Beaumont, W. et al. 2011. Cl and Magnesium-Limited Dolomite Precipitation at Deep Springs Lake, California. Sedimentology 58 (7): 1810–1830. https://doi.org/10.1111/j.1365-3091.2011.01240.x.
Paulo, J., Mackay, E. J., Menzies, N. A. et al. 2001. Implications of Brine Mixing in the Reservoir for Scale Management in the Alba Field. Presented at the SPE 3rd International Symposium on Oilfield Scale, Aberdeen, 30–31 January. SPE-68310-MS. https://doi.org/10.2118/68310-MS.
Pitzer, K. S. 1987. Thermodynamic Model for Aqueous Solutions of Liquid-Like Density. In Thermodynamic Modeling of Geological Materials: Minerals, Fluids and Melts, ed. I. S. E. Carmichael and H. P. Eugster, and in Reviews in Mineralogy and Geochemistry Vol. 17, pp. 97–142. Min. Soc. Am.
Reardon, E. J. and Armstrong, D. K. 1987. Celestite (SrSO4(s)) Solubility in Water, Seawater and NaCl Solution. Geochim. Cosmochim. Acta 51 (1): 63–72. https://doi.org/10.1016/0016-7037(87)90007-X.
Rothwell, N. R., Sorensen, A., Peak, J. L. et al. 1993. GYDA: Recovery of Difficult Reserves by Flexible Development and Conventional Reservoir Management. Presented at the Steering Committee of the European IOR Symposium. SPE-26778-MS. https://doi.org/10.2118/26778-MS.
Sorbie, K. S. and Mackay, E. J. 2000. Mixing of Injected, Connate and Aquifer Brines in Waterflooding and Its Relevance to Oilfield Scaling. Journal of Petroleum Science and Engineering 27 (1–2): 85–106. https://doi.org/10.1016/S0920-4105(00)00050-4.
Stanghelle, K. U. 2009. Evaluation of Artificial Lift Methods on the Gyda Field. MS thesis, University of Stavanger, Norway.
Vazquez, O., McCartney, R., and Mackay, E. 2013a. Produced Water Chemistry History Matching Using a 1D Reactive Injector Produced Reservoir Model. Presented at the SPE International Symposium on Oilfield Chemistry, The Woodlands, Texas, USA, 8–10 April. SPE-164113-MS. https://doi.org/10.2118/164113-MS.
Vazquez, O., Young, C., Demyanov, V. et al. 2013b. Produced Water Chemistry History Matching in the Janice Field. Presented at the EAGE Annual Conference & Exhibition incorporating SPE Europe, London, 10–13 June. SPE-164903-MS. https://doi.org/10.2118/164903-MS.