1887

Abstract

Summary

Fluid flow in fractured reservoirs is highly sensitive to the change of effective stress during fluid injection or production. Permeability, capillary pressure and relative permeability of rock fractures to oil and water directly impact hydrocarbon recovery. However, these parameters are difficult to measure in the lab as a function of effective stress. Available laboratory measurements are typically limited to a single-phase fracture permeability measurement under different stress, which is not sufficient to predict fracture relative permeability and capillary pressure vs stress.

We develop an approach to simulate stress effect on two-phase fracture-flow properties. This approach uses fracture aperture distribution based on micro-CT data and aspect ratio distribution of fracture voids from laboratory-measured stress-displacement measurements. Using these input data and using the network approach, we simulate the stress effect on fracture permeability, relative permeability and fracture capillarity. Simulation results are compared with available laboratory data for fracture permeability.

Our numerical approach allows quick computation of the stress effect on two-phase fluid-flow properties of fractured rock. The approach is consistent with the law of physics and driven by available input data. Rock curves, produced by our model can be used as input parameters for reservoir simulators.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201801132
2018-06-11
2020-04-04
Loading full text...

Full text loading...

References

  1. de la Porte, J. J., Kossack, C. A., & Zimmerman, R. W.
    (2005, January). The effect of fracture relative permeabilities and capillary pressures on the numerical simulation of naturally fractured reservoirs. In SPE annual technical conference and exhibition. Society of Petroleum Engineers.
    [Google Scholar]
  2. Huo, D., & Benson, S. M.
    (2016). Experimental investigation of stress-dependency of relative permeability in rock fractures. Transport in Porous Media, 113(3), 567–590.
    [Google Scholar]
  3. Jonoud, S. J., Wenneberg, O. P. W., Rozhko, A. R., Naumann, M. N., Lapponi, F. L., & Haugen, A. H.
    (2017, October). Microscopic Sweep Efficiency In Fractured Carbonate Reservoirs-Use Of Micro-Scale Models To Study Matrix Fracture Inter. In First EAGE Workshop on Evaluation and Drilling of Carbonate Reservoirs.
    [Google Scholar]
  4. Naumann, M., Rozhko, A.Y, Wennberg, O.P. and Jonoud, S.
    Submitted. Experimental investigations of mechanical and flow properties of a natural fracture in an argillaceous chalk reservoir. Extended abstract submitted to EAGE 80th Annual Conference & Exhibition2018, 11–14 JuneCopenhagen, Denmark.
    [Google Scholar]
  5. Pyrak-Nolte, L. J., & Nolte, D. D.
    (2016). Approaching a universal scaling relationship betweenfracture stiffness and fluid flow. Nature communications, 7, http://dx.doi.org/10.1038/ncomms10663
    [Google Scholar]
  6. Rozhko, A. Y.
    (2016). Two-phase fluid-flow modeling in a dilatant crack-like pathway. Journal of Petroleum Science and Engineering, 146, 1158–1172. https://doi.org/10.1016/j.petrol.2016.08.018
    [Google Scholar]
  7. Rozhko, A. Y., Wennberg, O.P., Jonoud, S.
    (2017, April). Modelling of normal net stress effect on two-phase relative permeability and capillary pressure of rough-walled fractures. In EAGE IOR- 19th European Symposium on Improved Oil Recovery, 24–27 April2017, Stavanger, Norway
    [Google Scholar]
  8. Wennberg, O. P., & Rennan, L.
    (2017). A brief introduction to the use of X-ray computed tomography (CT) for analysis of natural deformation structures in reservoir rocks. Geological Society, London, Special Publications, 459, SP459–10.
    [Google Scholar]
  9. Wennberg, O.P., Graham Wall, B., Sæther, E., Jonoud, S., Rozhko, A.Y, and Naumann, M.
    Submitted. Fractures in chalks and marls of the Shetland Group in the Gullfaks Field, North Sea. Extended abstract submitted to EAGE 80th Annual Conference & Exhibition2018, 11–14 JuneCopenhagen, Denmark.
    [Google Scholar]
  10. Zimmerman, R.W.
    (1991): Chapter 12. Aspect Ratio Distributions, Editor(s): RobertW.Zimmerman, In Developments in Petroleum Science, Elsevier, Volume 29, 1991, Pages 128–139, https://doi.org/10.1016/S0376-7361(08)70282-6.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801132
Loading
/content/papers/10.3997/2214-4609.201801132
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