Understanding the Links between Shale Gas Production and Ground Motion

 

NETL efforts focus on evaluating implications of fracture growth during hydraulic fracturing, and induced seismicity related to Unconventional Oil and Gas (UOG) development.

Generating the ability to evaluate geomechanical effects of fracturing and wastewater injection:

•Modeling fracture growth from shale gas reservoirs and potential fluid migration though these fractures

•Understanding causes of ground motion induced by wastewater injection

•Determining when, and if, predictive models can be used to identify cases of induced seismicity prior to injection

 

www.magma.geos.vt.edu/vtso/newsite/induced_quakes/induced_quakes.html

Map of Oklahoma earthquakes (red) and wastewater disposal wells (black)collected and cataloged as part of NETL’s effort to understand the recent and dramatic increase of seismicity in the United States.

 

Problem:
Seismic activity in the continental United States has increased dramatically as shale gas production has increased. Keeping abreast of the shifting landscape requires continual monitoring of multiple data sources and combining of the data sourses into a useable format.

Solution:
NETL and Virgina Tech have developed a webpage (link) that collects and describes this data.

Click Here for Video

Problem:
Fracture growth outside of shale gas reservoirs has been observed, and while these fractures are still far away from underground sources of drinking water there are fears of groundwater contamination from these fluid pathways.

Solution:
NETL is evaluating the potential for fluid migration through fractures that extend above shale gas formations with NFFLOW (link).

NETL’s modeling of fracture propagation in multilayer system (shale and overburden layers).

NETL’s modeling of fracture propagation in multilayer system (shale and overburden layers).