Models are used to predict the effectiveness of hydraulically fracturing wells in shale gas layers like
the Marcellus, and to inform future hydraulic fracturing in nearby wells.
These models are based on data gathered in the field which are imported into software programs to predict the
characteristics of the rock at depth. Field data usually incorporated into hydraulic fracture models include
seismic and microseismic data, well log data, expected pressures throughout the subsurface, and other rock
characteristics. Models predict how fracture fluid (and the associated pressures and fractures already present in the rock) will act during hydraulic fracturing. When measured values differ significantly from the modeled values, the fluids are not
behaving in the way the model predicted they would and one or more characteristics of the rock have not
been adequately modeled. This may occur if the model itself needs to be revised or if estimates of rock properties where the hydraulic fracturing is done were not accurate. Thus, to understand what is happening in the
rock below the surface, modeling is used in concert with field testing to assess most effective hydraulic fracturing treatment for different regions in the Marcellus Shale
Models are used to predict the effectiveness of hydraulically fracturing wells in shale gas layers like
the Marcellus, and to inform future hydraulic fracturing in nearby wells.
These models are based on data gathered in the field which are imported into software programs to predict the
characteristics of the rock at depth. Field data usually incorporated into hydraulic fracture models include
seismic and microseismic data, well log data, expected pressures throughout the subsurface, and other rock
characteristics. Models predict how fracture fluid (and the associated pressures and fractures already present in the rock) will act during hydraulic fracturing. When measured values differ significantly from the modeled values, the fluids are not
behaving in the way the model predicted they would and one or more characteristics of the rock have not
been adequately modeled. This may occur if the model itself needs to be revised or if estimates of rock properties where the hydraulic fracturing is done were not accurate. Thus, to understand what is happening in the
rock below the surface, modeling is used in concert with field testing to assess most effective hydraulic fracturing treatment for different regions in the Marcellus Shale
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