Fracture and alteration characterization in Ngatamariki Geothermal field

Geophysical well logs provide a powerful tool to study the rock properties in reservoirs of all kinds. However, the response of these well logs to rock characteristics in geothermal fields is not well understood. In fact, there is little in terms of published data on geophysical well logs in geothermal fields. Here, we propose to study the well logs collected during the Ngatamariki development program with the aim of better understanding the correlation between geophysical properties such as wave speed and resistivity and, rock mineralogy, porosity (fractures) and permeability.  Laboratory and geophysical well log data integration will provide insight into characterizing permeability, fractures and mineralogy at a variety of scales.