COMPARISON OF ACCURACY OF MICROSEISMIC EVENT LOCATION USING SURFACE AND DOWNHOLE ACQUISITION SYSTEMS
S.V. Yaskevich and A.A. Duchkov
Journal name: Seismic Technology
Issue: Vol 10, No 3, July 2013 pp. 1 - 16
Info: Article, PDF ( 232.67Kb )
Price: € 30
In the last decade microseismic monitoring of hydraulic fracturing has become a popular technology in the oil and gas industry. It is actively used for estimating geometric parameters of hydraulic fracture. For microseismic monitoring one can use surface or downhole seismic arrays. The former needs a number of geophones deployed at the earth surface above the place of hydraulic fracturing, the latter needs one or several downhole geophone arrays placed close to the area of interest. In this paper we compare accuracy of event location for both downhole and surface monitoring systems. It is shown that vertical coordinates of the event hypocenters (correct depth of the horizon being treated) can be properly estimated using downhole arrays. Surface monitoring array provides reliable estimates of horizontal positions of microseismic events.