1887

Abstract

Summary

Reservoir rocks characterization consists of a critical stage on petroleum reserves evaluation in which determining the relationships between petrophysical and mechanical rock properties is required to guarantee the accuracy of data. Mechanical properties affect both drilling programs and hydrocarbon exploitation. Hydrostatic compression tests on rocks, if conducted at stresses below failure, typically exhibit both non-linearity and hysteresis in the stress—strain curve. This behavior can be associated with the presence of cracks and pores. In this study, porosity and bulk volume deformation were analyzed and the different behavior under loading/ unloading conditions reveals the grain/pore interaction influence on these properties. Experiments were conducted increasing hydrostatic pressure from 400 psi to 1000 psi, registering loading and unloading data, on carbonate samples of American outcrops. The dissipated energy related to frictional sliding and adhesion effect, during confinement cycle, was estimated by the area of hysteresis loop in the effective pressure versus bulk volume crossplot.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201801609
2018-06-11
2024-03-28
Loading full text...

Full text loading...

References

  1. David, E.C., Brantut, N., Schubnel, A., Zimmerman, R.W.
    , 2012. Sliding crack model for nonlinearity and hysteresis in the uniaxial stress-strain curve of rock. International Journal of Rock Mechanics & Mining Sciences, 52: 9–17.
    [Google Scholar]
  2. García, X., Medina, E.A.
    , 2006. Hysteresis effects studied by numerical simulations: Cyclic loading-unloading of a realistic sand model. Geophysics, 71: 13–20.
    [Google Scholar]
  3. Mukul, M.S., Tutuncu, A.N.
    , 1994. Grain contact adhesion hysteresis: A mechanism for attenuation of seismic waves. Geophysical research letters, 21: 2323–232.
    [Google Scholar]
  4. Nejati, M., Paluszny, A., Zimmerman, R.W.
    , 2013. Theoretical and numerical modeling of rocks hysteresis based on sliding of microcracks. American Rock Mechanics Association. Geomechanics Symposium: 13–394.
    [Google Scholar]
  5. Tucuncu, A.N., Podio, A.L., Sharma, M.M.
    , 1998. Nonlinear viscoelastic behavior of sedimentary rocks, Part II: Hysteresis effects and influence of type of fluid on elastic moduli. Geophysics, 63: 195–203.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801609
Loading
/content/papers/10.3997/2214-4609.201801609
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