1887
Volume 36 Number 8
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

Determination of petrography and pore fluid content is an ultimate goal of an integrated seismic‐petrophysical study. For lack of a general inversion technique, forward modelling is useful in studying the relations between lithology, stratigraphy, pore fluid content and the seismic response. This report describes a study of two clastic sequences in Utah, from which 32 rock samples were analysed. A detailed petrographic study was done. Laboratory measurements were made of ultrasonic compressional‐ and shear‐wave velocity as a function of pressure. We computed the velocities at seismic frequencies for the samples when dry, over‐pressured, brine saturated, and oil saturated. The velocities were sensitive to the porosity, carbonate cementation and the depositional facies. We generated velocity profiles for hypothetical reservoirs for a range of saturation states. The velocity profiles were used to generate synthetic seismic shot gathers to study the seismic response of these clastic reservoirs. The fluid‐saturation strongly affects the seismic respone, as does the presence of a coal seam. An amplitude change with offset is often observed. However, stratigraphy appears to have a stronger effect on the seismic response.

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2006-04-27
2020-09-21
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References

  1. JONES, T.D.1986. Pore fluids and frequency‐dependent wave propagation in rocks. Geophysics51, 1939–1953.
    [Google Scholar]
  2. OSTRANDER, W.J.1982. Plane wave reflection coefficients for gas sands at non‐normal angles of incidence. Geophysics30, 552.
    [Google Scholar]
  3. RAFIPOUR, B.J. and HERRIN, E.1986. Phase Offset Indicator (POI): a study of phase shift versus offset and fluid content. Geophysics51, 679–688.
    [Google Scholar]
  4. TANER, M.T. and SHERIFF, R.E.1977. Application of amplitude, frequency, and other attributes to stratigraphic and hydrocarbon determination. American Association of Petroleum Geologists Memoir26, 301–327.
    [Google Scholar]
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  • Article Type: Research Article
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