1887

Abstract

Summary

This work demonstrates that for stress changes around the in situ stress, experimental stress sensitivity of a field shale core fits the linear stress path dependence that is expected on the basis of an assumed linear relationship between velocity changes and stress / pore pressure changes. This is based on ultrasonic laboratory measurements on a field shale core tested in undrained conditions along four different stress paths:Constant mean stress, isostatic, uniaxial strain, and triaxial. The in situ stress path depends on reservoir geometry, tilt, elastic contrast between reservoir and overburden, and possible non-elastic effects. Most often laboratory measurements are only carried out along one stress path, so the results from this work underline the significant importance of stress path for stress (and strain) sensitivity.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201601233
2016-05-30
2022-06-29
Loading full text...

Full text loading...

References

  1. Fjser, E., Holt, R.M., Horsrud, P., Raaen, A.M., and Risnes, R.
    [2008] Petroleum Related Rock Mechanics (2nd ed.). Elsevier. 491.
  2. Geertsma, J.
    [1973] A basic theory of subsidence due to reservoir compaction: The homogeneous case. Verhandelingen Kon. Ned. Geol. Mijnbouwk. Gen.28, 43–62.
    [Google Scholar]
  3. Hatchell, P. and Bourne, S.
    [2005] Rocks under strain: Strain-induced time-lapse time shifts are observed for depleting reservoirs. The Leading Edge24, 1222–1225.
    [Google Scholar]
  4. Hettema, M.H.H., Schutjens, P.M.T.M., Verboom, B.J.M., and Gussinklo, H.J.
    [2000] Production induced compaction of a sandstone reservoir: The strong influence of stress path. SPE Reservoir Eval. Eng. 3, 342–347.
    [Google Scholar]
  5. Holt, R.M., Nes, O.-M., and Fjser, E.
    [2005] In-situ stress dependence of wave velocities in reservoir and overburden rocks. The Leading Edge24, 1268–1274.
    [Google Scholar]
  6. Johnston, D.H.
    [1987] Physical properties of shale at temperature and pressure. Geophysics52, 1391–1401.
    [Google Scholar]
  7. KenterC.J., BeukelA.V.D., HatchellP., MaronK. and MolenaarM.
    [2004] Evaluation of reservoir characteristics from timeshifts in the overburden. Proceedings of the Gulf Rocks04, 04–627. ARMA/NARMS.
    [Google Scholar]
  8. Roste, T., Stovas, A., and Landro, M.
    [2006] Estimation of layer thickness and velocity changes using 4D prestack seismic data. Geophysics71, S219–S234.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201601233
Loading
/content/papers/10.3997/2214-4609.201601233
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error