DISTRIBUTED ACOUSTIC SENSING: LOCATING OF MICROSEISMIC EVENTS USING TRAVEL TIME INFORMATION WITH HETEROGENEOUS ANISOTROPIC VELOCITY MODEL

摘要

A fracture mapping system for use in hydraulic fracturing operations utilizing non-directionally sensitive fiber optic cable, based on distributed acoustic sensing, deployed in an observation well to detect microseismic events and to determine microseismic event locations in 3D space during the hydraulic fracturing operation. The system may include a weighted probability density function to improve the resolution of the microseismic event on the fiber optic cable.