Quantifying the Role of Grain Lining Hematite Cement in Controlling Permeability in a Relatively Tight Gas Sandstone Reservoir From the North Sea
- Arfan Ali (Heriot-Watt University) | Salem Abdalah (Heriot-Watt University) | David K. Potter (University of Alberta)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- December 2012
- Document Type
- Journal Paper
- 618 - 623
- 2012. Society of Petroleum Engineers
- 5.8.1 Tight Gas, 1.2.3 Rock properties, 1.14 Casing and Cementing
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- 499 since 2007
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Recent work has shown the potential usefulness of both magnetic susceptibility and magnetic hysteresis techniques in assessing the effect of fine-grained hematite on permeability, where the hematite was dispersed in the matrix of relatively tight gas red sandstone samples. The present study demonstrates that grain lining hematite cement is also a major controlling factor on permeability in a relatively tight gas sandstone reservoir in the North Sea. Magnetic susceptibility measurements on core plugs in this reservoir showed a strong correlation with probe permeability. Moreover, samples with a higher content of hematite exhibited lower permeability values. Thin-section analysis revealed the presence of a thin (approximately 10 to 15 lm) rim of hematite cement surrounding quartz grains, which block pore connections and reduce permeability. Magnetic hysteresis measurements on representative samples indicated a similar paramagnetic clay content in both the low and high permeability samples, suggesting that the clay (mainly illite) is not the dominant controlling factor that produces the variations in permeability that we observed. Because samples with higher hematite content exhibit lower permeability, it appears that hematite is a major control on the permeability variations seen in this reservoir. Although the paramagnetic clays undoubtedly have an influence on the absolute permeability values (increasing paramagnetic clay content has previously been shown to correlate with decreasing permeability), small amounts of grain lining hematite cement can reduce the permeability significantly further. Analysis of the magnetic hysteresis parameters on a Day plot indicated that the permeability was essentially independent of the hematite particle size for the fine particle sizes observed in this study.
|File Size||1 MB||Number of Pages||6|
Ali, A. and Potter, D.K. 2011a. Model Templates for Quantifying PermeabilityControlling Paramagnetic Clay Minerals at In Situ Reservoir Temperatures. InProceedings of the International Symposium of the Society of Core Analysts,18-21 September 2011, Austin, Texas. Fredericton, NB, Canada: Society ofCore Analysts.
Ali, A. and Potter, D.K. 2011b. Thermomagnetic Analyses of the PermeabilityControlling Minerals in Red and White Sandstones in Deep Tight Gas Reservoirs:Implications for Downhole Measurements. SPE Res Eval & Eng 14 (5): 557-565. http://dx.doi.org/10.2118/131265-PA.
Ali, A. and Potter, D.K. 2012. Temperature Dependence of the MagneticProperties of Reservoir Rocks and Minerals and Implications for In SituBorehole Predictions of Petrophysical Parameters. Geophysics 77 (3): WA211-WA221. http://dx.doi.org/10.1190/geo2011-0282.1.
Banerjee, S.K. 1971. New Grain Size Limits for Palaeomagnetic Stability inHematite. Nature Phys. Sci. 232: 15-16. http://dx.doi.org/10.1038/physci232015a0.
Chevallier, R. and Mathieu, S. 1943. Proprietes Magnetiques des PoudresD'hematite— Influence des Dimensions des Grains. Annales Phys. 18: 258-288.
Day, R., Fuller, M.,. and Schmidt, V.A. 1977. Hysteresis Properties ofTitanomagnetites: Grain Size and Composition Dependence. Physics of theEarth and Planetary Interiors 13 (4): 260-267. http://dx.doi.org/10.1016/0031-9201(77)90108-X.
Hunt, C.P., Moskowitz, B.M. and Banerjee, S.K. 1995. Magnetic Properties ofRocks and Minerals. In Rock Physics & Phase Relations: A Handbook ofPhysical Constants, AGU Ref. Shelf, ed. T.J. Ahrens, vol. 3, 189-204.Washington, DC: American Geophysical Union.
Ivakhnenko, O.P. 2006. Magnetic Analysis of Petroleum Reservoir Fluids,Matrix Mineral Assemblages and Fluid-Rock Interactions. PhD thesis, Heriot-WattUniversity, Edinburgh, UK.
Ivakhnenko, O.P. and Potter, D.K. 2008. The Use of Magnetic Hysteresis andRemanence Measurements for Rapidly and Nondestructively CharacterizingReservoir Rocks and Fluids. Petrophysics 49 (1): 47-56.
Lu, G., McCabe, C., Henry, D.J. et al. 1994. Origin of Hematite Carrying aLate Paleozoic Remagnetization in a Quartz Sandstone Bed from the Silurian RoseHill Formation, Virginia, USA. Earth and Planetary Science Letters 126 (4): 235-246. http://dx.doi.org/10.1016/0012-821X(94)90109-0.
Potter, D.K. 2007. Magnetic Susceptibility as a Rapid, NondestructiveTechnique for Improved Petrophysical Parameter Prediction1. Petrophysics 48 (3): 191-201.
Potter, D.K., Al-Ghamdi, T.M., and Ivakhnenko, O.P. 2011a. SensitiveCarbonate Reservoir Rock Characterization from Magnetic Hysteresis Curves andCorrelation with Petrophysical Properties. Petrophysics 52(1): 50-57.
Potter, D.K., Ali, A., Imhmed, S. et al. 2011b. Quantifying the Effects ofCore Cleaning, Core Flooding and Fines Migration Using Sensitive MagneticTechniques: Implications for Permeability Determination and Formation Damage.Petrophysics 52 (6): 444-451.
Potter, D.K., Ali, A., and Ivakhnenko, O.P. 2009. Quantifying the RelativeRoles of Illite and Hematite on Permeability in Red and White Sandstones UsingLow and High Field Magnetic Susceptibility. In Proceedings of theInternational Symposium of the Society of Core Analysts, 27-30 September2009, Noordwijk, The Netherlands.Fredericton, NB, Canada: Society of CoreAnalysts.
Potter, D.K., Corbett, P.W.M., Barclay, S.A. et al. 2004. Quantification ofIllite Content in Sedimentary Rocks Using Magnetic Susceptibility—A RapidComplement or Alternative to X-Ray Diffraction. J. Sedimentary Research 74 (5): 730-735. http://dx.doi.org/10.1306/021304740730.
Potter, D.K and Ivakhnenko, O.P. 2008. Clay Typing—Sensitive Quantificationand Anisotropy in Synthetic and Natural Reservoir Samples Using Low- andHigh-Field Magnetic Susceptibility for Improved Petrophysical Appraisals.Petrophysics 49 (1): 57-66.