Laboratory Investigations To Determine the Effect of Connate-Water Composition on Low-Salinity Waterflooding in Sandstone Reservoirs
- Ahmed M. Shehata (Texas A&M University) | Hisham A. Nasr-El-Din (Texas A&M University)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- February 2017
- Document Type
- Journal Paper
- 59 - 76
- 2017.Society of Petroleum Engineers
- low salinity, water flooding, connate water, oil recovery, sandstone
- 24 in the last 30 days
- 324 since 2007
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Most previous low-salinity-waterflooding studies focused on injection-brine salinity and composition. The question remains: How do the salinity and composition of the reservoir connate water (CW) affect the low-salinity-waterflooding performance? The main objectives of this work are to evaluate the potential of low salinity waterflooding (LSW) on the performance of oil recovery improvement by use of Buff Berea sandstone and Bandera sandstone cores; examine the effect of the salinity of the reservoir CW; investigate the role of the cation composition (Na+, Ca2+, and Mg2+) of the reservoir CW; and study the effect of temperature and pore-throat distribution on the performance of LSW.
In this research, 11 spontaneous-imbibition (SI) experiments and six coreflood experiments were performed. Two sandstone types (Bandera and Buff Berea) with different mineralogy compositions were used. Furthermore, ζ-potential measurements were conducted for oil/brine interfaces to investigate the interaction between brine and crude oil interfaces. In addition, coreflood experiments were performed to validate the SI results and examine the effect of the CW-salinity variation.
The reservoir-CW composition had a dominant influence on the oil-recovery rate. The changes in the cation composition of reservoir CW (Ca2+, Mg2+, and Na+) showed a measurable change in the oil-production trend. Reservoir cores saturated with CW containing divalent cations of Ca+2 and Mg+2 showed higher oil recovery than cores saturated with monovalent cations (Na+). The results demonstrate that the SI produced oil ranging from 38 to 69% of original oil in place (OOIP) for high-permeability Buff Berea cores (164–207.7 md), whereas the produced oil of the low permeability Bandera cores (31.1–39.2 md) ranged from 20 to 51.5% of OOIP at 77°F and 14.7 psia. In all cases, a measurable ion exchange was observed, whereas there was no significant change in the pH value of the imbibition brine during the experiments. The ion-exchange effect was more pronounced than the pH effect in the low-salinity-waterflooding performance for Buff Berea and Bandera sandstone. The total oil recovery increased from 51.9 to 58.9% OOIP when the divalent-cation (Ca+2 and Mg+2) concentration of the reservoir CW increased from 709 to 12,210 ppm for injected-brine salinity of 500 and 5,000 ppm, respectively. On the other hand, increasing the monovalent-cation (Na+) concentration from 610 to 54,400 ppm resulted in a slight increase in oil recovery (2.3% of OOIP).
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Abdulla, F., Hashem, S. H., Abdulraheem, B. et al. 2013. First EOR Trial Using Low Salinity Water Injection in the Greater Burgan Field, Kuwait. Presented at the 18th Middle East Oil and Gas Show and Conference, Manama, Bahrain, 10–13 March. SPE-16434-MS. http://dx.doi.org/10.2118/16434-MS.
Aksulu, H. 2010. Effect of Core Cleaning Solvents on Wettability Restoration and Oil Recovery by Spontaneous Imbibition in Surface Reactive, Low Permeable Limestone Reservoir Cores. Master’s thesis, University of Stavanger, Stavanger, Norway.
Alotaibi, M. B. and Nasr-El-Din, H. A. 2011. Electrokinetics of Limestone Particles and Crude-Oil Droplets in Saline Solutions. SPE Res Eval & Eng 14 (5): 604–611. SPE-151577-PA. http://dx.doi.org/10.2118/151577-PA.
Alotaibi, M. B., Azmy, R., and Nasr-El-Din, H. A. 2010. A Comprehensive EOR Study Using Low Salinity Water in Sandstone Reservoirs. Presented at the SPE Improved Oil Recovery Symposium, Tulsa, 24–28 April. SPE-129976-MS. http://dx.doi.org/10.2118/129976-MS.
Alotaibi, M. B., Nasralla, R. A. and Nasr-El-Din, H. A. 2011. Wettability Studies Using Low-Salinity Water in Sandstone Reservoirs. SPE Res Eval & Eng 14 (6): 713–725. SPE-149942-PA. http://dx.doi.org/10.2118/149942-PA.
Alshehri, A. J. and Kovscek, R. 2015. Impact of Chemical Flood Mode on Oil Recovery in Fractured Carbonates. Presented at SPE Middle East Oil & Gas Show and Conference, Manama, Bahrain, 8–11 March. SPE-172809-MS. http://dx.doi.org/10.2118/172809-MS.
Anderson, W. G. 1986. Wettability Literature Survey–Part 1: Rock/Oil/Brine Interactions and the Effects of Core Handling on Wettability. J Pet Technol 38 (10): 1125–1144. SPE-13932-PA. http://dx.doi.org/10.2118/13932-PA.
Archer, J. S. and Wall, C. G. 1986. Petroleum Engineering: Principles and Practice, first edition. London: Graham and Trotman.
Ashraf, A., Hadia, N. J., Torsaetar, O. et al. 2010. Laboratory Investigation of Low Salinity Waterflooding as Secondary Recovery Process: Effect of Wettability. Presented at SPE Oil and Gas India Conference and Exhibition, Mumbai, 20–22 January. SPE-129012-MS. http://dx.doi.org/10.2118/129012-MS.
Austad, T. 2013. Water-Based EOR in Carbonates and Sandstones: New Chemical Understanding of the EOR Potential Using Smart Water. In EOR Field Case Studies, ed. J. J. Sheng, Chap. 13, 301–335. Waltham, Massachusetts: Gulf Professional Publishing.
Austad, T., Rezaeidoust, A. and Puntervold, T. 2010. Chemical Mechanism of Low Salinity Water Flooding in Sandstone Reservoirs. Presented at the SPE Improved Oil Recovery Symposium, Tulsa, 24–28 April. SPE-129767-MS. http://dx.doi.org/10.2118/129767-MS.
Baptist, O. C. and Sweeney, S. A. 1955. Effects of Clays on the Permeability of Reservoir Sands to Various Saline Waters, Wyoming. US Bureau of Mines Report of Investigations 5180, US Department of the Interior, December 1955.
Bassin, N. J. and Ichiye, T. 1977. Flocculation of Suspended Sediments and Oil Emulsions. J. Sediment. Res. 47 (2): 671–677. http://dx.doi.org/10.1306/212F7216-2B24-11D7-8648000102C1865D.
Bataweel, M. A., Nasr-El-Din, H. A. and Schechter., D. S. 2011. Fluid Flow Characterization of Chemical EOR Flooding: A Computerized Tomography (CT) Scan Study. Presented at the SPE/DGS Saudi Arabia Section Technical Symposium and Exhibition, Al-Khobar, Saudi Arabia, 15–18 May. SPE-149066-MS. http://dx.doi.org/10.2118/149066-MS.
Bedrikovetsky, P., Zeinijahromi, A., Badalyan, A. et al. 2015. Fines-Migration-Assisted Low-Salinity Waterflooding: Field Case Analysis. Presented at the SPE Russian Petroleum Technology Conference, Moscow, 26–28 October. SPE-176721-MS. http://dx.doi.org/10.2118/176721-MS.
Bryant, S. and Blunt, M. J. 1992. Prediction of Relative Permeability in Simple Porous-Media. Phys. Rev. A 46 (4): 2004–2011. http://dx.doi.org/10.1103/PhysRevA.46.2004.
Chilingarian, G. V. 1963. Relationship Between Porosity, Permeability and Grain Size Distribution of Sands and Sandstones. In Deltaic and Shallow Marine Deposits, ed. L. M. J. U. Van Straaten, Chap. 8, 71–77. Amsterdam: Elsevier Science.
Cissokho, M., Boussour, S., Cordier, P. et al. 2010. Low Salinity Oil Recovery on Clayey Sandstone: Experimental Study. Petrophys. 51 (5): 305–313. SPWLA-2010-v51n5a2.
Coates, G., Xiao, L. and Prammer, M. 1999. NMR Logging: Principles and Applications. Houston: Gulf Publishing Company.
Cuiec, L. E. 1984. Rock/Crude Oil Interactions and Wettability: An Attempt to Understand their Interrelation. Presented at SPE Annual Technical Conference and Exhibition, Houston, 16–19 September. SPE-13211-MS. http://dx.doi.org/10.2118/13211-MS.
Fjelde, I., Asen, S. M. and Omekeh, A. 2012. Low Salinity Water Flooding Experiments and Interpretation by Simulations. Presented at the SPE Improved Oil Recovery Symposium, Tulsa, 14–18 April. SPE-154142-MS. http://dx.doi.org/10.2118/154142-MS.
Fjelde, I., Polanska, A., Taghiyev, F. et al. 2013a. Low Salinity Water Flooding: Retention of Polar Oil Components in Sandstone Reservoirs. Oral presentation given at the IOR 2013–17th European Symposium on Improved Oil Recovery, St. Petersburg, Russia, 16–18 April.
Fjelde, I., Asen, S. M., Omekeh, A. et al. 2013b. Secondary and Tertiary Low Salinity Water Floods: Experiments and Modelling. Presented at the EAGE Annual Conference & Exhibition incorporating SPE Europec, London, 10–13 June. SPE-164920-MS. http://dx.doi.org/10.2118/164920-MS.
Fjelde, I., Omekeh, A. V. and Sokama-Neuyam, Y. A. 2014. Low Salinity Water Flooding: Effect of Crude Oil Composition. Presented at SPE Improved Oil Recovery Symposium, Tulsa, 12–16 April. SPE-169090-MS. http://dx.doi.org/10.2118/169090-MS.
Hoffman, B. T. and Kovscek, A. R. 2004. Efficiency and Oil Recovery Mechanisms of Steam Injection into Low Permeability, Hydraulically Fractured Reservoirs. Petrol. Sci. Technol. 22 (5–6): 537–564. http://dx.doi.org/10.1081/LFT-120034187.
Ibrahim, M. N. M. and Koederitz, L. F. 2000. Two-Phase Relative Permeability Prediction Using a Linear Regression Model. Presented at the SPE Eastern Regional Meeting, Morgantown, West Virginia, 17–19 October. SPE-65631-MS. http://dx.doi.org/10.2118/65631-MS.
Jadhunandan, P. P. and Morrow, N. R. 1995. Effect of Wettability on Waterflood Recovery for Crude-Oil/Brine/Rock Systems. SPE Res Eng 10 (1): 40–46. SPE-22597-PA. http://dx.doi.org/10.2118/22597-PA.
Jerauld, G. R., Webb, K. J., Lin, C. et al. 2006. Modeling Low-Salinity Waterflooding. SPE Res Eval & Eng 11 (6): 1000–1012. http://dx.doi.org/10.2118/102239-PA.
Jia, D., Buckley, J. S. and Morrow, N. R. 1991. Control of Core Wettability with Crude Oil. Presented at the SPE International Symposium on Oilfield Chemistry, Anaheim, California, 20–22 February. SPE-21041-MS. http://dx.doi.org/10.2118/21041-MS.
Kolodzie, J. 1980. Analysis of Pore Throat Size and Use of the Waxman-Smits Equation to Determine OOIP in Spindle Field, Colorado. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, 21–24 September. SPE-9382-MS. http://dx.doi.org/10.2118/9382-MS.
Lager, A., Webb, K. J. and Black, C. J. J. 2006. Low Salinity Oil Recovery–An Experimental Investigation. Oral presentation given at the International Symposium of the Society of Core Analysts, Trondheim, Norway, 12–16 September.
Law, S., Sutcliffe, P. G. and Fellows, S. A. 2014. Secondary Application of Low Salinity Waterflooding to Forties Sandstone Reservoirs. Presented at the SPE Annual Technical Conference and Exhibition, Amsterdam, 27–29 October. SPE-170725-MS. http://dx.doi.org/10.2118/170725-MS.
Lee, S. Y., Webb, K. J., Collins, I. R. et al. 2010. Low Salinity Oil Recovery – Increasing Understanding of the Underlying Mechanisms. Presented at the SPE Improved Oil Recovery Symposium, Tulsa, 24–28 April. SPE-129722-MS. http://dx.doi.org/10.2118/129722-MS.
Martin, A. J., Solomon, S. T. and Hartmann, D. J. 1997. Characterization of Flow Units in Carbonate Reservoirs. AAPG Bull. 81 (5): 734–759.
McGuire, P. L., Chatham, J. R., Paskvan, F. K. et al. 2005. Low Salinity Oil Recovery: An Exciting New EOR Opportunity for Alaska’s North Slope. Presented at the SPE Western Regional Meeting, Irvine, California, 30 March–1 April. SPE-93903-MS. http://dx.doi.org/10.2118/93903-MS.
Meyers, K. O. and Salter, S. J. 1984. Concepts Pertaining to Reservoir Pretreatment for Chemical Flooding. Presented at SPE Enhanced Oil Recovery Symposium, Tulsa, 15–18 April. SPE-12696-MS. http://dx.doi.org/10.2118/12696-MS.
Morrow, N. and Buckley, J. 2011. Improved Oil Recovery by Low-Salinity Waterflooding. J Pet Technol 63 (5): 106–112. SPE-129421-JPT. http://dx.doi.org/10.2118/129421-JPT.
Nasralla, R. A., Alotaibi, M. B. and Nasr-El-Din, H. A. 2011. Efficiency of Oil Recovery by Low Salinity Water Flooding in Sandstone Reservoirs. Presented at the SPE Western North American Region Meeting, Anchorage, 7–11 May. SPE 144602-MS. http://dx.doi.org/10.2118/144602-MS.
Nasralla, R. A. and Nasr-El-Din, H. A. 2011. Impact of Electrical Surface Charges and Cation Exchange on Oil Recovery by Low Salinity Water. Presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, Jakarta, 20–22 September. SPE-147937. http://dx.doi.org/10.2118/147937-MS.
Nasralla, R. A. and Nasr-El-Din, H. A. 2014. Double-Layer Expansion: Is It A Primary Mechanism of Improved Oil Recovery by Low-Salinity Waterflooding? SPE Res Eval & Eng 17 (1): 49–59. SPE-154334-PA. http://dx.doi.org/10.2118/154334-PA.
Robertson, E. P. 2007. Low-Salinity Waterflooding to Improve Oil Recovery–Historical Field Evidence. Presented at SPE Annual Technical Conference and Exhibition, Anaheim, California, 11–14 November. SPE-109965-MS. http://dx.doi.org/10.2118/109965-MS.
Rotondi, M., Callegaro, C., Masserano, F. et al. 2014. Low Salinity Water Injection: eni’s Experience. Presented at Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 10–13 November. SPE-171794-MS. http://dx.doi.org/10.2118/171794-MS.
Rivet, S. M., Lake, L. W. and Pope, G. A. 2010. A Coreflood Investigation on Low-Salinity Enhanced Oil Recovery. Presented at the SPE Annual Technology Conference and Exhibition, Florence, Italy, 19–22 September. SPE 134297-MS. http://dx.doi.org/10.2118/134297-MS.
Seccombe, J., Lager, A., Jerauld, G. et al. 2010. Demonstration of Low-Salinity EOR at Interwell Scale, Endicott Field, Alaska. Presented at the SPE Improved Oil Recovery Symposium, Tulsa, 24–28 April. SPE-129692-MS. http://dx.doi.org/10.2118/129692-MS.
Sharma, M. M. and Filoco, P. R. 2000. Effect of Brine Salinity and Crude-Oil Properties on Oil Recovery and Residual Saturations. SPE J. 5 (3): 293–300. SPE-65402-PA. http://dx.doi.org/10.2118/65402-PA.
Shehata, A. M. and Nasr-El-Din, H. A. 2014. Role of Sandstone Mineral Compositions and Rock Quality on the Performance of Low-Salinity Waterflooding. Presented at the International Petroleum Technology Conference, Kuala Lumpur, 10–12 December. IPTC-18176-MS. http://dx.doi.org/10.2523/IPTC-18176-MS.
Shehata, A. M. and Nasr-El-Din, H. A. 2015. Zeta Potential Measurements: Impact of Salinity on Sandstone Minerals. Presented at the SPE International Symposium on Oilfield Chemistry, The Woodlands, Texas, 13–15 April. SPE-173763-MS. http://dx.doi.org/10.2118/173763-MS.
Sheng, J. J. 2011. Modern Chemical Enhanced Oil Recovery – Theory and Practice. Burlington, Massachusetts: Gulf Professional Publishing.
Sheng, J .J. 2014. Critical Review of Low-Salinity Waterflooding. J. Pet. Sci. Eng. 120 (August): 216–224. http://dx.doi.org/10.1016/j.petrol.2014.05.026.
Shojaei, M.-J., Ghazanfari, M. H. and Masihi, M. 2015. Relative Permeability and Capillary Pressure Curves for Low Salinity Waterflooding in Sandstone Rocks. J. Nat. Gas Sci. Eng. 25 (July): 30–38. http://dx.doi.org/10.1016/j.jngse.2015.04.023.
Skrettingland, K., Holt, T., Tweheyo, M. T. et al. 2010. Snorre Low Salinity Water Injection–Core Flooding Experiments and Single Well Field Pilot. Presented at the SPE Improved Oil Recovery Symposium, Tulsa, 24–28 April. SPE-129877-MS. http://dx.doi.org/10.2118/129877-MS.
Sorop, T. G., Suijkerbuijk, B. M. J. M., Masalmeh, S. K. et al. 2013. Integrated Approach in Deploying Low Salinity Waterflooding. Presented at the SPE Enhanced Oil Recovery Conference, Kuala Lumpur, 2–4 July. SPE-165277-MS. http://dx.doi.org/10.2118/165277-MS.
Suijkerbuijk, B., Hofman, J., Ligthelm, D. J. et al. 2012. Fundamental Investigations into Wettability and Low Salinity Flooding by Parameter Isolation. Presented at the SPE Improved Oil Recovery Symposium, Tulsa, 14–18 April. SPE-154204-MS. http://dx.doi.org/10.2118/154204-MS.
Tang, G. and Morrow, N. R. 1997. Salinity, Temperature, Oil Composition, and Oil Recovery by Waterflooding. SPE Res Eng 12 (4): 269–276. SPE-36680-PA. http://dx.doi.org/10.2118/36680-PA.
Tang, G. and Morrow, N. R. 1999. Influence of Brine Composition and Fines Migration on Crude Oil/Brine/Rock Interactions and Oil Recovery. J. Pet. Sci. Eng. 24 (2–4): 99–111. http://dx.doi.org/10.1016/S0920-4105(99)00034-0.
Tavassoli, Z., Zimmerman, R. W. and Blunt, M. J. 2005. Analytic Analysis for Oil Recovery During Counter-Current Imbibition in Strongly Water-Wet Systems. Transport Porous Med. 58 (4): 173–189. http://dx.doi.org/10.1007/s11242-004-5474-4.
Webb, K. J., Black, C. J. J. and Al-Ajeel, H. 2004. Low Salinity Oil Recovery–Log-Inject-Log. Presented at the SPE/DOE Symposium on Improved Oil Recovery, Tulsa, 7–21 April. SPE-89379-MS. http://dx.doi.org/10.2118/89379-MS.
Webb, K., Lager, A. and Black, C. 2008. Comparison of High/Low Salinity Water/Oil Relative Permeability. Oral presentation given at the International Symposium of the Society of Core Analysis, Abu Dhabi, 29 October–2 November.
Yildiz, H. O. and Morrow, N. R. 1996. Effect of Brine Composition on Recovery of Moutray Crude Oil by Waterflooding. J. Pet. Sci. Eng. 14 (3–4): 159–168. http://dx.doi.org/10.1016/0920-4105(95)00041-0.
Zhang, Y. and Morrow, N. R. 2006. Comparison of Secondary and Tertiary Recovery with Change in Injection Brine Composition for Crude Oil Sandstone Combinations. Presented at the SPE/DOE Symposium on Improved Oil Recovery, Tulsa, 22–26 April. SPE-99757-MS. http://dx.doi.org/10.2118/99757-MS.
Zhou, X., Torsaeter, O., Xie, X. et al. 1995. The Effect of Crude-Oil Aging Time and Temperature on the Rate of Water Imbibition and Long-Term Recovery by Imbibition. SPE Form Eval 10 (4): 259–266. SPE-26674-PA. http://dx.doi.org/10.2118/26674-PA.