A new Petrel-based workflow from Schlumberger, ‘Mangrove,’ offers a holistic approach to stimulation design in both conventional and non conventional reservoirs. The Petrel earth model is the basis for geomechanical and fracture network models that are input to a ‘completion advisor.’
A range of inputs is used to derive two critical parameters—reservoir quality (a measure of source rock potential) and completion quality (a ‘frackability’ indicator). These parameters combine to highlight potential sweet spots. These are further investigated with a variety of fracture simulators including a new unconventional fracture modeler, UFM.
The UFM model claimed to be the ‘first commercially available complex hydraulic fracture model to incorporate fracture-to-fracture interactions.’ The model rolls-up information on natural fractures, geomechanics, fracture propagation and fluid and proppant transport. The UFM allows engineers to maximize well productivity. Schlumberger’s Intersect simulator computes fluid flow around the borehole using a variable density unstructured grid.
A paper in Schlumberger’s Oilfield Review described how two Marcellus shale operators have successfully used Mangrove workflows. The paper also describes PetroChina’s use of Mangrove to design a stimulation program for a conventional clastic target in China’s Ordos basin.
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