Methods and systems for monitoring and modeling hydraulic fracturing of a reservoir field

A system for determining the effect of hydraulic fracturing on a reservoir, the system comprising:

• a plurality of seismic sensors for collecting microseismic data for plurality of microseismic events occurring at the reservoir in response to hydraulic fracturing;
• a processing system receiving the microseismic data and configured to:
• model each of a plurality of the microseismic events as a set of fracture parameters for a fracture uniquely associated with the microseismic event, the fracture parameters being determined in dependence on the collected microseismic data, the fracture parameters for each microseismic event including a location of the uniquely associated fracture, a radius of the uniquely associated fracture, and a fracture plane orientation of the uniquely associated fracture;
• determine a number of fracture plane intersections between nonparallel fractures in dependence on the locations, radiuses and fracture plane orientations of the fractures within a region of the reservoir;
• determine fracture complexity of the region of the reservoir by tallying the number of fracture plane intersections of nearest neighbor events to a grid point;
• determine a stimulated reservoir volume for the region of the reservoir as a representation of the effect of the hydraulic fracturing on the reservoir based on identification of sub-regions of the region for which the fracture complexity reaches a fracture complexity thresholds;
• and
• optimizing fracture treatment parameters for future hydraulic fracturing of the reservoir by adjusting one or more of bottom hole pressure, proppant concentration, proppant composition, fluid density, fluid viscosity, fluid flow rate and fluid type in accordance with the determined stimulated reservoir volume for the region.