1887
Volume 24, Issue 1
  • ISSN: 1354-0793
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Abstract

The Eocene El Garia Formation in the offshore Hasdrubal Field was originally a nummulitic limestone in which subsequent burial dolomitization has significantly enhanced permeability. Identification of the reservoir's petrophysical property distributions requires knowledge of the spatial extent of its dolomitization, in turn requiring understanding of the processes that caused the dolomitization. Some of this understanding can be derived from measurements but others need to be simulated. In this study, the former are used as guides and we focus on the latter, evaluating the character of the dolomitizing fluid's movement and temperature patterns by using basin modelling to develop heat-flux simulations to represent the time of dolomitization. Basin modelling reconstructs the region's geology at the time of dolomitization, while heat-flux simulations recreate the appropriate conductive and convective heat and mass transport through these systems. Potential key drivers are rock mass and fault-zone permeability, and the position and shape of any salt domes. The results suggest that salt dome shape and position is the dominant control, the salt dome localizing convective systems which also use convenient faults so that hotter upwelling fluids pass through the Hasdrubal reservoir and are instrumental in the development of burial dolomitization.

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References

  1. Ali, S., Clark, W., Moore, W. & Dribus, J.
    2010. Diagenesis and reservoir quality. Oilfield Review, 22, 14–27.
    [Google Scholar]
  2. Bächler, D., Kohl, T. & Rybach, L.
    2003. Impact of graben-parallel faults on hydrothermal convection – Rhine Graben case study. Physics and Chemistry of the Earth, Parts A/B/C, 28, 431–441.
    [Google Scholar]
  3. Beavington-Penney, S.
    2004. El Garia Formation Lithofacies Analysis, Gulf of Gabes, Tunisia. BG Group Internal Report. BG Group, Reading, UK, 1–54.
    [Google Scholar]
  4. Beavington-PenneyS.J.
    2011. An Alternative Model for Controls on Flow in the Hasdrubal Reservoir: Implications for Petrel Property Modelling. BG Group Internal Report. BG Group, Reading, UK, 1–9.
    [Google Scholar]
  5. Beavington-Penney, S.J., Wright, V.P. & Racey, A.
    2005. Sediment production and dispersal on foraminifera-dominated early Tertiary ramps: the Eocene El Garia Formation, Tunisia. Sedimentology, 52, 537–569.
    [Google Scholar]
  6. Beavington-Penney, S.J., Nadin, P., Wright, V.P., Clarke, E., McQuilken, J. & Bailey, H.W.
    2008. Reservoir quality variations on an Eocene carbonate ramp, El Garia Formation, offshore Tunisia: Structural control of burial corrosion and dolomitisation. Sedimentary Geology, 209, 42–57.
    [Google Scholar]
  7. Bishop, W.
    1975. Geology of Tunisia and adjacent part of Algeria and Lybia. America Association of Petroleum Geologists Bulletin, 59, 413–450.
    [Google Scholar]
  8. Braithwaite, C.J.R., Rizzi, G. & DarkeG.
    2004. The geometry and petrogenesis of dolomite hydrocarbon reservoirs: introduction. In: Braithwaite, C.J.R., Rizzi, G. & Darke, G. (eds) The Geometry and Petrogenesis of Dolomite Hydrocarbon Reservoirs. Geological Society, London, Special Publications, 235, 1–6, https://doi.org/10.1144/GSL.SP.2004.235.01.01
    [Google Scholar]
  9. Burchette, T.P.
    2012. Carbonate rocks and petroleum reservoirs: a geological perspective from the industry. In: Garland, J., Neilson, J., Laubach, S.E. & Whidden, K. (eds) Advances in Carbonate Exploration and Reservoir Analysis. Geological Society, London, Special Publications, 370, 17–37, https://doi.org/10.1144/SP370.14
    [Google Scholar]
  10. Burnham, A.K. & Sweeney, J.J.
    1989. A chemical kinetic model of vitrinite maturation and reflectance. Geochimica et Cosmochimica Acta, 53, 2649–2657.
    [Google Scholar]
  11. Chen, W., Ghaith, A., Park, A. & Ortoleva, P.
    1990. Diagenesis through coupled processes: Modeling approach, self-organization, and implications for exploration. In: Meshri, I.D. & Ortoleva, P.J. (eds) Prediction of Reservoir Quality through Chemical Modeling. American Association of Petroleum Geologists, Memoirs, 49, 103–130.
    [Google Scholar]
  12. Corbella, M., Gomez-Rivas, E.
    2014. Insights to controls on dolomitization by means of reactive transport models applied to the Benicàssim case study (Maestrat Basin, eastern Spain). Petroleum Geoscience, 20, 41–54, https://doi.org/10.1144/petgeo2012-095
    [Google Scholar]
  13. Crutchley, G.J., Geiger, S., Pecher, I.A., Gorman, A.R., Henrys, S.A. & ZhuH.
    2010. The potential influence of shallow gas and gas hydrates on sea floor erosion of Rock Garden, an uplifted ridge offshore of New Zealand. Geo-Marine Letters, 30, 283–303, https://doi.org/10.1007/s00367-010-0186-y
    [Google Scholar]
  14. Crutchley, G.J., Berndt, C.
    2013. Drivers of focused and prolonged fluid flow and methane seepage at South Hydrate Ridge, offshore Oregon, USA. Geology, 41, 551–554, https://doi.org/10.1130/G34057.1
    [Google Scholar]
  15. Davies, G.R. & Smith, L.B., Jr.
    2006. Structurally controlled hydrothermal dolomite reservoir facies: An overview. American Association of Petroleum Geologists Bulletin, 90, 1641–1690.
    [Google Scholar]
  16. Driesner, T. & Heinrich, C. A.
    2007. The system H2O–NaCl. Part I: Correlation formulae for phase relations in temperature–pressure–composition space from 0 to 1000°C, 0 to 5000bar, and 0 to 1 XNaCl . Geochimica et Cosmochimica Acta, 71, 4880–4901.
    [Google Scholar]
  17. Dutton, S. P. & Land, L. S.
    1988. Cementation and burial history of a low-permeability quartzarenite, Lower Cretaceous Travis Peak Formation, East Texas. Geological Society of America Bulletin, 100, 1271–1282.
    [Google Scholar]
  18. Friedman, I. & O'Neill, J.R.
    1977. Chapter KK: Compilation of stable isotope fractionation factors of geochemical interest. In: Fleischer, M. (eds) Data of Geochemistry, 6th edn. United States Geological Survey, Professional Papers, 440-KK.
    [Google Scholar]
  19. Garcia-Fresca, B., Lucia, J.F., Harp, J.Jr. & Kerans, C.
    2012. Outcrop constrained hydrogeological simulations of brine reflux and early dolomitization of the Permina San Andres Formation. American Association of Petroleum Geologists Bulletin, 96, 1757–1781.
    [Google Scholar]
  20. Garland, J., Neilson, J., Laubach, S.E. & Whidden, K.J.
    2012. Advances in carbonate exploration and reservoir analysis. In: Garland, J., Neilson, J., Laubach, S.E. & Whidden, K. (eds) Advances in Carbonate Exploration and Reservoir Analysis. Geological Society, London, Special Publications, 370, 1–15, https://doi.org/10.1144/SP370.15
    [Google Scholar]
  21. Geiger, S., Driesner, T., Heinrich, C. A. & Matthäi, S. K.
    2005. On the dynamics of NaCl–H2O fluid convection in the Earth's crust. Journal of Geophysical Research: Solid Earth, 110, 1–23.
    [Google Scholar]
  22. Geiger, S., Driesner, T., Heinrich, C.A. & Matthäi, S.K.
    2006a. Multiphase thermohaline convection in the Earth's crust: I. A novel finite element-finite volume solution technique combined with a new equation of state for NaCl–H2O. Transport in Porous Media, 63, 399–434.
    [Google Scholar]
  23. 2006b. Multiphase thermohaline convection in the Earth's crust: II. Benchmarking and application of a finite element–finite volume solution technique with a NaCl–H2O equation of state. Transport in Porous Media, 63, 435–461.
    [Google Scholar]
  24. Guillou-Frottier, L., Carrė, C., Bourgine, B., Bouchot, V. & Genter, A.
    2013. Structure of hydrothermal convection in the Upper Rhine Graben as inferred from corrected temperature data and basin-scale numerical models. Journal of Volcanology and Geothermal Research, 256, 29–49.
    [Google Scholar]
  25. Harcouët-Menou, V., Guillou-Frottier, l., Bonneville, A., Adler, P. M. & Mourzenko, V.
    2009. Hydrothermal convection in and around mineralized fault zones: insights from two-and three-dimensional numerical modeling applied to the Ashanti belt, Ghana. Geofluids, 9, 116–137.
    [Google Scholar]
  26. Hardie, L.A.
    1987. Dolomitization: a critical view of some current views. Journal of Sedimentary Petrology, 57, 166–183.
    [Google Scholar]
  27. Hoefs, J.
    2009. Stable Isotope Geochemistry. Springer, Berlin.
    [Google Scholar]
  28. Ingebritsen, S. E., Geiger, S., Hurwitz, S. & Driesner, T.
    2010. Numerical simulation of magmatic hydrothermal systems. Reviews of Geophysics, 48, 1–33.
    [Google Scholar]
  29. Jones, G.D., Whitaker, F.F., Smart, P.L. & Sanford, W.E.
    2000. Numerical modeling of geothermal and reflux circulation in Enewetak Atoll: Implications for dolomitization. Journal of Geochemical Exploration, 69–70, 71–75, https://doi.org/10.1016/S0375-6742(00)00010-8
    [Google Scholar]
  30. Jones, G.D., Smart, P.L., Whitaker, F.F., Rostrom, J.B. & Machel, H.G.
    2003. Numerical modeling of reflux dolomitization in the Grosmont platform complex (Upper Devonian), Western Canada sedimentary basin. American Association of Petroleum Geologists Bulletin, 87, 1273–1298, https://doi.org/10.1306/03260302007
    [Google Scholar]
  31. Kampman, N., Burnside, N. M., Shipton, Z. K., Chapman, H. J., Nicholl, J. A., Ellam, R. M. & Bickle, M. J.
    2012. Pulses of carbon dioxide emissions from intracrustal faults following climatic warming. Nature Geoscience, 5, 352–358.
    [Google Scholar]
  32. Kaufman, J.K.
    1994. Numerical models of fluid flow in carbonate platforms: Implications for dolomitization. Journal of Sedimentary Research, A64, 128–139.
    [Google Scholar]
  33. Klett, T.R.
    2001. Total Petroleum Systems of the Pelagian Province, Tunisia, Libya, Italy, and Malta – The Bou Dabbous–Tertiary and Jurassic–Cretaceous Composite. United States Geological Survey Bulletin, 2202-D.
    [Google Scholar]
  34. Lee, M.K.
    1997. Predicting diagenetic effects of groundwater flow in sedimentary basins: a modeling approach with examples. In: Montañez, L.E., Gregg, J.M. & Shelton, K.L. (eds) Basinwide Fluid Flow and Associated Diagenetic Patterns: Integrated Petrographic, Geochemical, and Hydrologic Consideration. Society of Economic Paleontologist and Mineralogists (SEPM), Special Publications, 57, 3–14.
    [Google Scholar]
  35. Lewis, H. & Couples, G.D.
    1999. Carboniferous basin evolution of central Ireland-simulation of structural controls on mineralization. In: McCaffrey, K.J.W., Lonergan, L. & Wilkinson, J.J. (eds) Fractures, Fluid Flow and Mineralization. Geological Society, London, Special Publications, 155, 277–302, https://doi.org/10.1144/GSL.SP.1999.155.01.19
    [Google Scholar]
  36. Loucks, R.G., Moody, R.T.J., Bellis, J.K. & Brown,A.A.
    1998. Regional depositional setting and pore network systems of the El Garia Formation (Metlaoui Group, Lower Eocene), offshore Tunisia. In: MacGregor, D.S., Moody, R.T.J. & Clark-Lowes, D.D. (eds) Petroleum Geology of North Africa. Geological Society of London, Special Publications, 132, 355–374, https://doi.org/10.1144/GSL.1998.132.01.20
    [Google Scholar]
  37. Lucia, F.J.
    2004. Origin and petrophysics of dolostone pore space. In: Braithwaite, C.J.R., Rizzi, G. & Darke, G. (eds) The Geometry and Petrogenesis of Dolomite Hydrocarbon Reservoirs. Geological Society, London, Special Publications, 235, 141–155, https://doi.org/10.1144/GSL.SP.2004.235.01.06
    [Google Scholar]
  38. Lupi, M., GeigerS & GrahamC.M.
    2010. Hydrothermal fluid flow within a tectonically active rift-ridge transform junction: Tjörnes Fracture Zone, Iceland. Journal of Geophysical Research, 115, B05104, https://doi.org/10.1029/2009JB006640
    [Google Scholar]
  39. Lupi, M., GeigerS. & GrahamC.M.
    2011. Numerical simulations of seismicity-induced fluid flow in the Tjoernes Fracture Zone, Iceland. Journal of Geophysical Research, 116, B07101, https://doi.org/10.1029/2010JB007732
    [Google Scholar]
  40. Macaulay, C.I., Beckett, D., Braithwaite, K., BliefnickD. & Philps, B.
    2001. Constraints on diagenesis and reservoir quality in the fractured Hasdrubal field, offshore Tunisia. Journal of Petroleum Geology, 24, 55–78.
    [Google Scholar]
  41. Machel, H.G.
    2004. Concepts and models of dolomitization: a critical reappraisal. In: Braithwaite, C.J.R., Rizzi, G. & Darke, G. (eds) The Geometry and Petrogenesis of Dolomite Hydrocarbon Reservoirs. Geological Society, London, Special Publications, 235, 7–63, https://doi.org/10.1144/GSL.SP.2004.235.01.02
    [Google Scholar]
  42. 2005. Investigations of burial diagenesis in carbonate hydrocarbon reservoir rocks. Geoscience Canada, 32, 103–128.
    [Google Scholar]
  43. Machel, H.G. & Mountjoy, E.W.
    1986. Chemistry and environments of dolomitization-a reappraisal. Earth-Science Reviews, 23, 175–222.
    [Google Scholar]
  44. Mangione, A.
    2016. Characterisation of a dolomitised offshore carbonate reservoir using basin modelling, digital rock models and high-resolution heat-flow simulations. PhD thesis, Heriot-Watt University, Edinburgh.
    [Google Scholar]
  45. Matthäi, S.K., Heinrich, C.A. & Driesner, T.
    2004. Is the Mount Isa copper deposit the product of forced brine convection in the footwall of a major reverse fault?Geology, 32, 357–360, https://doi.org/10.1130/G20108.1
    [Google Scholar]
  46. Matthäi, S.K., Geiger, S.
    2007. Numerical simulation of multi-phase fluid flow in structurally complex reservoirs. In: Jolley, S.J., Barr, D., Walsh, J.J. & Knipe, R.J. (eds) Structurally Complex Reservoirs. Geological Society, London, Special Publications, 292, 405–429, https://doi.org/10.1144/SP292.22
    [Google Scholar]
  47. MatthewsA. & KatzA.
    1977. Oxygen isotope fractionation during the dolomitization of calcium carbonate. Geochimica et Cosmochimica Acta, 41, 1431–1438.
    [Google Scholar]
  48. McQuilken, J.
    1998. Hasdrubal Petroleum Geochemistry and Basin Modelling. BG Group Internal Report. BG Group, Reading, UK, 1–52.
  49. Mejri, F., Burollet, P.F. & Ben Ferjani, A.
    2006. Petroleum Geology of Tunisia. A Renewed Synthesis. ETAP Memoirs, 22.
    [Google Scholar]
  50. Morrow, D.W.
    1982a. Diagenesis 1. Dolomite – Part 1: The chemistry of dolomitization and dolomite precipitation. Geoscience Canada, 9, 5–13.
    [Google Scholar]
  51. 1982b. Diagenesis 2. Dolomite – Part 2: Dolomitization models and ancient dolostones. Geoscience Canada, 9, 95–107.
    [Google Scholar]
  52. O'Brien, J.J. & LercheI.
    1987. Heat flow and thermal maturation near salt diapirs. In: Lerche, I. (ed.) Dynamical Geology of Salt and Related Structures. Elsevier, Amsterdam, 711–750.
    [Google Scholar]
  53. Person, M., Banerjee, A., Hofstra, A., Sweetkind, D. & Gao, Y.
    2008. Hydrologic models of modern and fossil geothermal systems in the Great Basin: Genetic implications for epithermal Au–Ag and Carlin-type gold deposits. Geosphere, 4, 888–917.
    [Google Scholar]
  54. Person, M., Bense, V., Cohen, D. & Banerjee, A.
    2012. Models of ice-sheet hydrogeologic interactions: a review. Geofluids, 12, 58–78.
    [Google Scholar]
  55. Racey, A., Bailey, H.W., Beckett, D., Gallagher, L.T., HamptonM.J. & McQuilken, J.
    2001. The petroleum geology of the early Eocene El Garia Formation, Hasdrubal Field, offshore Tunisia. Journal of Petroleum Geology, 24, 29–53.
    [Google Scholar]
  56. Saller, A.H. & Dickson, J.A.T.D.
    2011. Partial dolomitization of a Pennsylvanian limestone buildup by hydrothermal fluids and its effect on reservoir quality and performance. American Association of Petroleum Geologists Bulletin, 95, 1745–1762.
    [Google Scholar]
  57. Sclater, J.G. & Christie, P.A.F.
    1980. Continental stretching: an explanation of the post-Mid-Cretaceous subsidence of the Central North Sea Basin. Journal of Geophysical Research, 85, 3711–3739.
    [Google Scholar]
  58. Sibson, R.H.
    2007. An episode of fault-valve behaviour during compressional inversion? – The 2004 MJ6.8 Mid-Niigata Prefecture, Japan, earthquake sequence. Earth and Planetary Science Letters, 257, 188–199.
    [Google Scholar]
  59. Stanislavsky, E. & Garven, G.
    2003. A theoretical model for reverse water-level fluctuations induced by transient permeability in thrust fault zones. Earth and Planetary Science Letters, 210, 579–586.
    [Google Scholar]
  60. Sun, Q.S.
    1995. Dolomite reservoirs: porosity evolution and reservoirs characteristics. American Association of Petroleum Geologists Bulletin, 79, 186–206.
    [Google Scholar]
  61. Vasconcelos, C., McKenzie, J.A., WarthmannR. & BernasconiS.M.
    2005. Calibration of the d18O paleothermometer for dolomite precipitated in microbial cultures and natural environments. Geology, 33, 317–320, https://doi.org/10.1130/G20992.1
    [Google Scholar]
  62. Weis, P., Driesner, T., Coumou, D. & Geiger, S.
    2014. Hydrothermal, multiphase convection of H2O–NaCl fluids from ambient to magmatic temperatures: a new numerical scheme and benchmarks for code comparison. Geofluids, 14, 347–371.
    [Google Scholar]
  63. Whitaker, F.F. & Xiao, Y.
    2010. Reactive transport modelling of early burial dolomitization of carbonate platforms by geothermal convection. American Association of Petroleum Geologists Bulletin, 94, 889–917.
    [Google Scholar]
  64. Whitaker, F.F., Smart, P.L. & Jones, G.D.
    2004. Dolomitization: From conceptual to numerical models. In: Braithwaite, C.J.R., Rizzi, G. & Darke, G. (eds) The Geometry and Petrogenesis of Dolomite Hydrocarbon Reservoirs. Geological Society, London, Special Publications, 235, 99–139, https://doi.org/10.144/GLS.SP.2004.235.01.235
    [Google Scholar]
  65. Wilson, M.E.J., Evans, M.J., Oxtoby, N. H., Nas, D.S., Donnelly, T. & ThirlwallM.
    2007. Reservoir quality, textural evolution, and origin of fault-associated dolomites. American Association of Petroleum Geologists Bulletin, 91, 1247–1272.
    [Google Scholar]
  66. Wynn, T. & Milne, K.
    2010. Hasdrubal Field Fracture Modelling Study. AGR TRACS International Consultancy Limited, Aberdeen.
    [Google Scholar]
  67. Zaïer, A., Beji-Sassi, A., Sassi, S. & Moody, R.T.J.
    1998. Basin evolution and deposition during the Early Paleogene in Tunisia. In: MacGregor, D.S., Moody, R.T.J. & Clark-Lowes, D.D. (eds) Petroleum Geology of North Africa. Geological Society, London, Special Publications, 132, 375–393, https://doi.org/10.1144/GSL.SP.1998.132.01.21
    [Google Scholar]
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