Microseismic Event Localization And Characterization In a Limited Aperture HFM Experiment Available to Purchase

Hydraulic fracturing is commonly used for production enhancement in mature reservoirs. The objective of fracturing the rock by injecting fluid under high pressure is to increase the permeability of the reservoir and thereby improve the oil or gas recovery. During the fracturing phase, microseismic events can be recorded and studied to better understand the induced fractures within the reservoir and to address potential leak-off of the injected fluid outside the induced fracture zone. A microseismic dataset from a hydraulic fracturing monitoring (HFM) experiment was acquired in October 2003 in Hokkaido, Japan, by JAPEX. The study of this dataset, recorded with only a four-receiver array in a single, distant monitor well, revealed the geometrical trend of microseismicity, and indicated two distinct event clusters exhibiting different amplitude ratios of P- and S-waves (S/P).