METHOD AND TOOL FOR DETERMINATION OF FRACTURE GEOMETRY IN SUBTERRANEAN FORMATIONS BASED ON IN-SITU NEUTRON ACTIVATION ANALYSIS

摘要

A method for determining fracturegeometry of a subterranean formation from radiation emittedfrom a fracture in the formation, including measuringgamma-radiation emitted from the fracture; subtractingbackground radiation from the measuredgamma- radia-tion to obtain a peak-energy measurement; comparingthe peak-energy measurement with a gamma-raytransport/spectrometer response model; and determiningformation fracture geometry of the fracture in accordancewith values associated with the response model.