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Volume 61 Number 1
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

The effect of sub‐core scale heterogeneity on fluid distribution pattern, and the electrical and acoustic properties of a typical reservoir rock was studied by performing drainage and imbibition flooding tests with CO and brine in a laboratory. Moderately layered Rothbach sandstone was used as a test specimen. Two core samples were drilled; one perpendicular and the other parallel to the layering to allow injection of fluids along and normal to the bedding plane. During the test 3D images of fluid distribution and saturation levels were mapped by an industrial X‐ray CT‐scanner together with simultaneous measurement of electrical resistivity, ultrasonic velocities as well as amplitudes.

The results showed how the layering and the flooding direction influenced the fluid distribution pattern and the saturation level of the fluids. For a given fluid saturation level, the measured changes in the acoustic and electrical parameters were affected by both the fluid distribution pattern and the layering orientation relative to the measurement direction. The P‐wave amplitude and the electrical resistivity were more sensitive to small changes in the fluid distribution patterns than the P‐wave velocity. The change in amplitude was the most affected by the orientation of the layering and the resulting fluid distribution patterns. In some instances the change due to the fluid distribution pattern was higher than the variation caused by the change in CO saturation. As a result the Gassmann relation based on ‘uniform' or ‘patchy' saturation pattern was not suitable to predict the P‐wave velocity variation. Overall, the results demonstrate the importance of core‐imaging to improve our understanding of fluid distribution patterns and the associated effects on measured rock‐physics properties.

© 2012 European Association of Geoscientists & Engineers
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2012-04-30
2024-04-19

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References

  1. AkinS. and KovscekA.R.2003. Computed tomography in petroleum engineering research. Geological Society, London 215, 23–38.
    [Google Scholar]
  2. AlemuB.L., AkerE., SoldalM., JohnsenØ. and AagaardP.2011. Influence of CO2 on rock physics properties in typical reservoir rock: A CO2 flooding experiment of brine saturated sandstone in a CT‐scanner. Energy Procedia 4, 4379–4386.
    [Google Scholar]
  3. ArchieG.E.1942. The Electrical Resistivity Log as an Aid in Determining Some Reservoir Characteristics.
  4. ArtsR., EikenO., ChadwickA., ZweigelP., van der MeerL. and ZinsznerB.2004. Monitoring of CO2 injected at Sleipner using time‐lapse seismic data. Energy 29, 1383–1392.
    [Google Scholar]
  5. BourbieT. and ZinsznerB.1984. Saturation methods and attenuation versus saturation relationships in fontainebleau sandstone. SEG Technical Program Expanded Abstracts 3, 344–347.
    [Google Scholar]
  6. BrieA., PampuriF., MarasalaA.F. and MeazzaO.1995. Shear sonic interpretation in gas‐bearing sands. Society of Petroleum Engineers SPE No. 30595 .
    [Google Scholar]
  7. CadoretT., MarionD. and ZinsznerB.1995. Influence of frequency and fluid distribution on elastic‐wave velocities in partially saturated limestones. Journal of Geophysical Research-Solid Earth 100, 9789–9803.
    [Google Scholar]
  8. CadoretT., MavkoG. and ZinsznerB.1998. Fluid distribution effect on sonic attenuation in partially saturated limestones. Geophysics 63, 154–160.
    [Google Scholar]
  9. CastagnaJ.P., BatzleM.L. and KanT.K.1993. Rock physics – the link between rock properties and AVO response. In: Theory and practice of AVO analyses (eds. J.P.Castagna and M.M.Backus ), pp. 135–171. Society of Exploration Geophysists.
    [Google Scholar]
  10. ChryssanthakisP., WesterdahlH., RoseE., RhettD. and PedersonS.1999. High temperature triaxial tests with ultrasonic measurements on Ekofisk chalk. In: Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS). Balkema, Rotterdam. Permission to Distribute – American Rock Mechanics Association.
  11. DurandC.2003. Combined Use of X‐ray CT Scan and Local Resistivity Measurements: A New Approach to Fluid Distribution Description in Cores. In: SPE Annual Technical Conference and Exhibition .
    [Google Scholar]
  12. HelleH.B., PhamN.H. and CarcioneJ.M.2003. Velocity and attenuation in partially saturated rocks: poroelastic numerical experiments. Geophysical Prospecting 51, 551–566.
    [Google Scholar]
  13. HollowayS.1997. An overview of the underground disposal of carbon dioxide. Energy Conversion and Management 38, S193‐S198.
    [Google Scholar]
  14. KimJ.W., XueZ. and Matsuoka, T.2010. Experimental Study On CO2 Monitroing and Saturation With Combined P‐wave Velocity and Resistivity. In: International Oil and Gas Conference and Exhibition in China . Society of Petroleum Engineers.
  15. KnightR. and NolenhoeksemaR.1990. A laboratory study of the dependence of elastic wave velocities on pore scale fluid distribution. Geophysical Research Letters 17, 1529–1532.
    [Google Scholar]
  16. KrauseM.H., PerrinJ.‐C. and BensonS.M.2009. Modeling Permeability Distributions in a Sandstone Core for History Matching Coreflood Experiments. In: SPE International Conference on CO2 Capture, Storage, and Utilization .
  17. LebedevM., Toms‐StewartJ., ClennellB., PervukhinaM., ShulakovaV., PatersonL. et al . 2009. Direct laboratory observation of patchy saturation and its effects on ultrasonic velocities. The Leading Edge 28, 24–27.
    [Google Scholar]
  18. LeiX.L. and XueZ.Q.2009. Ultrasonic velocity and attenuation during CO2 injection into water‐saturated porous sandstone: Measurements using difference seismic tomography. Physics of the Earth and Planetary Interiors 176, 224–234.
    [Google Scholar]
  19. MonsenK. and JohnstadS.E.2005. Improved understanding of velocity‐saturation relationships using 4D computer‐tomography acoustic measurements. Geophysical Prospecting 53, 173–181.
    [Google Scholar]
  20. MurphyW.F.I.1982. Effects of partial water saturation on attenuation in Massilon sandstone and Vycor porous glass. The Journal of the Acoustical Society of America 71, 1458–1468.
    [Google Scholar]
  21. MüllerT.M., GurevichB. and LebedevM.2010. Seismic wave attenuation and dispersion resulting from wave‐induced flow in porous rocks – A review. Geophysics 75, 75A147–75164.
    [Google Scholar]
  22. NakatsukaY., XueZ., GarciaH. and MatsuokaT.2010. Experimental study on CO2 monitoring and quantification of stored CO2 in saline formations using resistivity measurements. International Journal of Greenhouse Gas Control 4, 209–216.
    [Google Scholar]
  23. NakatsukaY., XueZ., YamadaY. and MatsuokaT. Year. Experimental study on monitoring and quantifying of injected CO2 from resistivity measurement in saline aquifer storage. Conference Experimental study on monitoring and quantifying of injected CO2 from resistivity measurement in saline aquifer storage, 2211–2218.
  24. NorrisA.1993. Low‐frequency dispersion and attenuation in partially saturated rocks. Journal of the Acoustical Society America 94, 359.
    [Google Scholar]
  25. PerrinJ.‐C. and BensonS.2010. An Experimental Study on the Influence of Sub‐Core Scale Heterogeneities on CO2 Distribution in Reservoir Rocks. Transport in Porous Media 82, 93–109.
    [Google Scholar]
  26. ShiJ.‐Q., XueZ. and DurucanS.2011. Supercritical CO2 core flooding and imbibition in Berea sandstone – CT imaging and numerical simulation. Energy Procedia 4, 5001–5008.
    [Google Scholar]
  27. SumanR.J. and KnightR.J.1997. Effects of pore structure and wettability on the electrical resistivity of partially saturated rocks;A network study. Geophysics 62, 1151–1162.
    [Google Scholar]
  28. TomsJ., MüllerT.M., CizR. and GurevichB.2006. Comparative review of theoretical models for elastic wave attenuation and dispersion in partially saturated rocks. Soil Dynamics and Earthquake Engineering 26, 548–565.
    [Google Scholar]
  29. WangZ. and GeliusL.‐J.2010. Electric and elastic properties of rock samples: A unified measurement approach. Petroleum Geoscience 16, 171–183.
    [Google Scholar]
  30. WangZ., GeliusL.J. and KongF.N.2009. Simultaneous core sample measurements of elastic properties and resistivity at reservoir conditions employing a modified triaxial cell – A feasibility study. Geophysical Prospecting 57, 1009–1026.
    [Google Scholar]
  31. XueZ., KimJ.W., MitoS., KitamuraK. and MatsuokaT.2009. Detecting and Monitoring CO2 With P‐Wave Velocity and Resistivity From Both Laboratory and Field Scales. In: SPE International Conference on CO2 Capture, Storage, and Utilization . Society of Petroleum Engineers.
  32. ZhouD.G., ArbabiS. and StenbyE.H.1997. A percolation study of wettability effect on the electrical properties of reservoir rocks. Transport in Porous Media 29, 85–98.
    [Google Scholar]
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Effect of sub‐core scale heterogeneities on acoustic and electrical properties of a reservoir rock: a CO2 flooding experiment of brine saturated sandstone in a computed tomography scanner
Geophysical Prospecting 61, 235 (2013); https://doi.org/10.1111/j.1365-2478.2012.01061.x
/content/journals/10.1111/j.1365-2478.2012.01061.x
/content/journals/10.1111/j.1365-2478.2012.01061.x
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  • Article Type: Research Article
Keyword(s): Fluid saturation; Imaging; Rock physics

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