For a multi-well multi-stage hydraulic fracturing campaign of a North American shale gas play we investigate geomechanical effects on drawdown management to improve our understanding of declining production rates. We calibrate a geomechanical model by determining and constraining rock properties, pore pressures and stresses along the well trajectory as well as demonstrate its role in estimating the rock strength (UCS) for significant underbalanced drilling conditions. In this way, we find the area under investigation to be quite heterogeneous, as data from offset wells show different UCS magnitudes. To better understand the mechanism of production decline rates, we analyse the productivity of corresponding wells in line with their choke size and drawdown control. This identifies a positive production-related choke and drawdown management effect for a distinct and simultaneous decrease in both choke size and drawdown pressures. Finally, we utilize the geomechanical model to investigate injection and depletion effects on critically stressed fractures. Our results suggest that with depletion the number of critically stressed fractures significantly decreases. Hence, a successful proppant settlement is critical for minimising loss of production.


Article metrics loading...

Loading full text...

Full text loading...


  1. Hummel, N. and Shapiro, S. A.
    [2013] Nonlinear diffusion-based interpretation of induced seismicity: A Barnett Shale hydraulic fracturing case study. Geophysics78(5), B211–B226. doi: 10.1190/geo2012‑0242.1.
    https://doi.org/10.1190/geo2012-0242.1 [Google Scholar]
  2. [2015] Back front of seismicity induced by non-linear pore pressure diffusion. Geophysical Prospecting, 64: 170–191. doi:10.1111/1365‑2478.12247.
    https://doi.org/10.1111/1365-2478.12247 [Google Scholar]
  3. Hummel, N., Parotidis, M., Graham, J., Wheeler, J. and Foo, K.
    [2015] Geomechanics and Applications – A Case Study From an Onshore Coal Seam Gas Field in Australia. 77th EAGE Conference and Exhibition. doi: 10.3997/2214‑4609.201412637.
    https://doi.org/10.3997/2214-4609.201412637 [Google Scholar]
  4. Shapiro, S. A.
    [2008] Microseismicity – A tool for reservoir Characterization. EAGE Publications.
    [Google Scholar]
  5. Zoback, M. D.
    [2007] Reservoir Geomechanics. Cambridge University Press, Cambridge, United Kingdom. doi: 10.1017/CBO9780511586477.
    https://doi.org/10.1017/CBO9780511586477 [Google Scholar]

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