Reservoir Simulation, Ion Reactions, and Near-Wellbore Modelling to Aid Scale Management in a Subsea Gulf of Mexico Field
- Eric Mackay (Heriot-Watt University) | Myles M. Jordan (NalcoChampion) | Oleg Ishkov (Heriot-Watt University) | Oscar Vazquez (Heriot Watt University)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- August 2014
- Document Type
- Journal Paper
- 172 - 182
- 2014.Society of Petroleum Engineers
- 4.3.4 Scale, 4.1.2 Separation and Treating, 5.2 Reservoir Fluid Dynamics, 5.7.2 Recovery Factors, 6.5.2 Water use, produced water discharge and disposal, 5.5 Reservoir Simulation
- inflow control valves, injection, scale management, reservoir simulation, inhibitor placement
- 1 in the last 30 days
- 327 since 2007
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This paper presents the findings of a study into the impact of reservoir flow behavior on the scaling risk at production wells and the options for managing this scaling risk for a deepwater sandstone reservoir in the Gulf of Mexico. One significant feature in this field is that flow takes place through isolated formation layers, and choices made regarding the seawater-injection wells have a great impact, not only on the barium sulfate (BaSO4) scaling tendency, but also on the placement of scale-inhibitor squeeze treatments in the producers. In addition to seawater injection, oil production is supported by the aquifer. The first stage of this study involved identifying the split between connate water, aquifer water, and seawater in the produced brine. This provided data that could be used to calculate the evolution of the scaling risk over the life cycle of each well. The formation brines contained barium, the injection water was full-sulfate seawater, and the relative proportion of brine (the water-production rate, pressure, and temperature conditions) determined the scaling risk. The evaluation of the extent of reactions between the injection water (sulfate) and formation water (barium) from injection to production well can result in a significant reduction in the available barium within the produced water, and hence, the scale risk and scale-inhibitor concentration required for prevention of scale deposition. In this study, because the injection wells were completed with inflow-control valves (ICVs), the opportunity was given to manage the injection split by means of these ICVs, not only to improve sweep efficiency, but also to balance reservoir pressures and make squeeze treatments more efficient. This study will present the squeeze-treatment volumes and estimated treatment lifetimes possible for two scenarios for the water-injection application to this deepwater field. The implications of this type of study will be highlighted in terms of the options that this data will allow an operator to consider before commissioning water injection in these challenging environments.
|File Size||1 MB||Number of Pages||11|
Bertero, L., Chierici, G.L., Gottardi, G. et al. 1988. Chemical Equilibrium Models: Their Use in Simulating the Injection of Incompatible Waters. SPE Res Eng 3 (1): 288-294. SPE-14126-PA. http://dx.doi.org/10.2118/14126-PA.
Børeng, R., Sorbie, K.S., and Yuan, M.D. 1994. The Underlying Theory and Modelling of Scale Inhibitor Squeezes in Three Offshore Wells on the Norwegian Continental Shelf. Proc., Fifth International Oilfield Chemicals Symposium, Geilo, Norway, 20–23 March.
Bourne, H.M., Booth, S.L., and Brunger, A. 1999. Combining Innovative Technologies To Maximize Scale Squeeze Cost Reduction. Presented at the PE International Symposium on Oilfield Chemistry, Houston, 16-19 February. SPE-50718-MS. http://dx.doi.org/10.2118/50718-MS.
Clemmit, A.F., Ballance, D.C., and Hunton, A.G. 1985. The Dissolution Of Scales In Oilfield Systems. Presented at the Offshore Europe, Aberdeen, UK, 10-13 September. SPE-14010-MS. http://dx.doi.org/10.2118/14010-MS.
Collins, I.R., Stewart, N.J., Wade, S.R. et al. 1997. Extending Scale Squeeze Lifetimes Using a Chemical Additive: From the Laboratory to the Field. Presented at the 1997 IBC Technical Conference on Advances in Solving Oilfield Scaling, Aberdeen, UK, 23–24 January.
Davis, R., Lomax, I., and Plummer, M. 1996. Membranes solve North Sea waterflood sulfate problems. Oil Gas J. 94 (48).
Graham, G.M., Mackay, E.J., Dyer, S.J. et al. 2002. The Challenges for Scale Control in Deepwater Production Systems: Chemical Inhibition and Placement. Presented at the NACE International CORROSION 2002 57th Annual Conference and Exposition, Denver, 7-11 April. NACE-02316.
Hardy, J.A. and Simm, I. 1996. Low sulfate seawater mitigates barite scale. Oil Gas J. 94 (50).
Hinrichsen, C.J. 1998. Preventing Scale Deposition in Oil Production Facilities: An Industry Review. Presented at the NACE International CORROSION 98 53rd Annual Conference and Exposition, San Diego, California, USA, 22-27 March. Paper No. NACE-98061.
Jacques, D.F. and Bourland, B.I. 1983. A Study of Solubility of Strontium Sulfate. Society of Petroleum Engineers Journal 23 (2): 292-300. SPE-9625-PA. http://dx.doi.org/10.2118/9625-PA.
Jordan, M.M., Sjuraether, K., Collins, I.R. et al. 2001. Life Cycle Management of Scale Control within Subsea Fields and its Impact of Flow Assurance, Gulf of Mexico and the North Sea Basin. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, 30 September–3 October. SPE-71557-MS. http://dx.doi.org/10.2118/71557-MS.
Mackay, E.J. 2003. Predicting in-situ sulphate scale deposition and the impact on produced ion concentrations. Trans IChemE 81 (A): 326–332.
Mackay, E.J. and Sorbie, K.S. 2000. Brine Mixing in Waterflooded Reservoirs and the Implications for Scale Prevention. Presented at the International Symposium on Oilfield Scale, Aberdeen, 26–27 May. SPE-60193-MS. http://dx.doi.org/10.2118/60193-MS.
Mackay, E.J., Collins, I.R., Jordan, M.M. et al. 2003. PWRI: Scale Formation Risk Assessment and Management. Presented at the International Symposium on Oilfield Scale, Aberdeen, 29–30 January. SPE-80385-MS. http://dx.doi.org/10.2118/80385-MS.
Mackay, E.J., Jordan, M.M., and Torabi, F. 2003. Predicting Brine Mixing Deep Within the Reservoir and Its Impact on Scale Control in Marginal and Deepwater Developments. SPE Prod & Oper 18 (3): 210-220. SPE-85104-PA. http://dx.doi.org/10.2118/85104-PA.
Mackay, E.J., Jordan, M.M., Feasey, N.D. et al. 2005. Integrated Risk Analysis for Scale Management in Deepwater Developments. SPE Prod & Oper 20 (2): 138-154. SPE-87459-PA. http://dx.doi.org/10.2118/87459-PA.
McElhiney, J.E. 2003. Deepwater project economics demand sulfate removal to ensure scale-free operation. Offshore 63 (5).
Mendoza, A., Graham, G.M., and Sorbie, K.S. 1999. Sulphate scale dissolution: examination of the factors controlling the effectiveness of EDTA and DTPA based on scale dissolvers and their comparative effectiveness against different sulphate minerals. Presented at the 10th NIF International Oilfield Chemical Symposium, Fagernes, Norway, 28 February - 03 March.
Oddo, J.E. and Tomson, M.B. 1994. Why Scale Forms and How to Predict It. SPE Prod & Fac 9 (1): 47–54. SPE-21710-PA. http://dx.doi.org/10.2118/21710-PA.
Paulo, J. and Mackay, E.J. 2001. Modelling of In-Situ Scale Deposition. Presented at the 12th International Oil Field Chemistry Symposium, Geilo, Norway, 1–4 April.
Ramstad, K., Tydal, T., Ellersten, E. et al. 1999. Precipitation and Deposition of CaCO3. Laboratory Studies and Field Experience. Presented at the 1999 NIF Tenth International Oil Field Chemicals Symposium, Fagernes, Norway, 1-3 March.
Sorbie, K.S. and MacKay, E.J. 2000. Mixing of injected, connate and aquifer brines in waterflooding and its relevance to oilfield scaling. J. Pet. Sci. Eng. 27 (1-2): 85–106. http://dx.doi.org/10.1016/S0920-4105(00)00050-4.
Tanner, R.N. and Wittingham, K.P. 1986. Scale Control During Waterflooding Operations: A Field Appraisal of Inhibitor Requirements and Performance. Presented at the International Meeting on Petroleum Engineering, Beijing, 17-20 March. SPE-14127-MS. http://dx.doi.org/10.2118/14127-MS.
Vetter, O.J., Kandarpa, V., and Harouaka, A. 1982. Prediction of Scale Problems Due to Injection of Incompatible Waters. J Pet Technol 34 (2): 273-284. SPE-7794-PA. http://dx.doi.org/10.2118/7794-PA.
Vetter, O.J.G. and Phillips, R.C. 1970. Prediction of Deposition of Calcium Sulfate Scale Under Down-Hole Conditions. J Pet Technol 22 (10): 1299-1308. SPE-2620-PA. http://dx.doi.org/10.2118/2620-PA.
Vu, V.K., Hurtevent, C., and Davis, R.A. 2000. Eliminating the Need for Scale Inhibition Treatments for Elf Exploration Angola's Girassol Field. Presented at the International Symposium on Oilfield Scale, Aberdeen, UK, 26-27 January. SPE-60220-MS. http://dx.doi.org/10.2118/60220-MS.
White, R., Brookley, J., and Menzies, N. 1999. Practical Experiences of Gel Diversion Technique and an Overview of Scale Management for the Alba Field. Presented at the SPE Symposium on Oilfield Scale: Field Applications and Novel Solutions, Aberdeen, Scotland, 27–28 January.