The aim of this paper is to present workflow of implementing 1-D geomechanical analysis for optimization hydraulic fracturing design. Well stress modelling is very important in case of optimal stimulation of unconventional shale formations. It can be achieved by generating complex fracture system around the horizontal wellbore. Properly designed hydraulic fracturing is currently the best way to improve contact between well and unconventional reservoir. Data gathered during hydraulic fracturing treatments resulted in calibration existing geological models and optimization of future well completions. Geomechanical modelling and results obtained from Lublin Basin Silurian shale formation hydraulic stimulation are good example of cooperation between geology and engineering teams. Similar analysis can be transferred to other unconventional basins, regarding to acquire enough data. The examples showed in this paper illustrate iterative workflow of the ORLEN Upstream Ltd. in improving hydraulic fracturing design. Furthermore, it also demonstrates production potential of shale formations of the Lublin Basin and determines way for exploration unconventional rocks in Poland.


Exploration and production of unconventional plays requires integration and cooperation across geological and engineering teams. As mentioned previously by

Wikel, 2011

, geomechanics is recently becoming more appreciated bridge between geological sciences and engineering practice. It is also one of the most impacting parameters of shale reservoirs. Geomechanical parameters determines how borehole instability features appears, how hydraulic fractures grows and how much proppant can be pumped into formation.

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