1887

Abstract

Summary

This paper presents laboratory studies of the stress dependent permeability in the ultra-deep naturally fractured tight gas reservoir in Tarim basin, China and its impact on the long-term gas recovery. Permeability of these samples was measured using pulse decay test technique under a wide range of combinations of effective stress and temperature up to 6500psi and 70° C, respectively through loading and unloading process. Moreover, the effects of morphology and filling condition of natural fractures and effective stress were studied. Due to the existence of natural fractures in tight reservoir, the stress dependency and hysteresis of permeability is larger. In addition, the morphology, distribution and filling condition of the natural fractures have a great impact on the permeability evolution with effective stress. Specifically, the hysteresis of stress dependent permeability is the largest if the nature fracture is through the whole sample and vertical to the end faces while the magnitude of the permeability decline is the smallest if there are multiple or reticular fractures. Moreover, the permeability declines by 10% more as the effective stress reaches 3000psi if the natural fracture is partially filled compared to that of the samples with fully filled natural fractures.

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/content/papers/10.3997/2214-4609.201901436
2019-06-03
2020-08-05
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References

  1. Ali, T. A. and Sheng, J. J.
    [2015]. Evaluation of The Effect of Stress-dependent Permeability On Production Performance in Shale Gas Reservoirs. SPE Eastern Region conference, 203–208.
    [Google Scholar]
  2. Abass, H. H., Ortiz, I., Khan, M. R., Beresky, J.K. and Sierra, L.
    [2007]. Understanding Stress Dependent Permeability of Matrix, Natural Fractures, and Hydraulic Fractures in Carbonate Formations. SPE Saudi Arabia Section Technical Symposium. SPE-110973-MS.
    [Google Scholar]
  3. Bian, D. Z., Zhao, L., Chen, Y. F., Yu, L. and Fan, Z. F.
    [2011]. Fracture characteristics and genetic mechanism of overpressure carbonate reservoirs: taking the kenkiyak oilfield in kazakhstan as an example. Petroleum Exploration and Development, 38(4), 394–399.
    [Google Scholar]
  4. Brace, W., Walsh, J. B., and Frangos, W. T.
    [1968]. Permeability of granite under high pressure. Journal of Geophysical research, 73(6), 2225–2236.
    [Google Scholar]
  5. Kim, B.Y., Akkutlu, I. Y., Martysevich, V. and Dusterhoft, R.
    [2018]. Laboratory Measurement of Microproppant Placement Quality using Split Core Plug Permeability under Stress. Society of Petroleum Engineers. SPE-189832-MS.
    [Google Scholar]
  6. King, H., Sansone, M., Kortunov, P., Xu, Y., Callen, N., Chhatre, S., Sahoo, H. and Buono, A.
    [2018]. Microstructural Investigation of Stress-Dependent Permeability in Tight-Oil Rocks. Society of Petrophysicists and Well-Log Analysts.
    [Google Scholar]
  7. Li, C. L. and Zhu, S. Y.
    [2015]. Misunderstanding of measuring methods of stress sensibility. Lithologic Reservoirs, 27(6), 1–4.
    [Google Scholar]
  8. Pan, Z., Connell, L.D., Camilleri, M.
    [2010]. Laboratory characterisation of coal reservoir permeability for primary and enhanced coalbed methane recovery. International Journal of Coal Geology, 82, 252–261.
    [Google Scholar]
  9. Zeng, Z. J., Li, X. C., Shi, L., Bai, B., Fang, Z. M. and Wang, Y.
    [2014]. Experimental study of the laws between the effective confining pressure and mudstone permeability. Energy Procedia, 63, 5654–5663.
    [Google Scholar]
  10. Zhao, L., Chen, Y. F., Ning, Z. F., Fan, Z. F., Wu, X. L., Liu, L. F. and Chen, X.
    [2013]. Stress sensitive experiments for abnormal overpressure carbonate reservoirs: a case from the kenkiyak fractured-porous oil field in the littoral caspian basin. Petroleum Exploration & Development, 40(2), 208–215.
    [Google Scholar]
  11. Zhang, R., Ning, Z. F., Yang, F. and Zhao, H.
    [2015]. Shale stress sensitivity experiment and mechanism. Acta Petrolei Sinica, 36(2), 224–231, 237.
    [Google Scholar]
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