Geothermal Well Log Interpretation

Abstract

This paper presents possible algorithm which can be used for a conventional geothermal well logging interpretation. This algorithm consists of the basic equations in formation evaluation, empirical equations often used in oil reservoir evaluation, and equations derived from double-porosity model theory. To show the validity of this algorithm, sample calculations arepresented in this paper. The total porosity distributions and the distributions of the fraction of the pore volume made up of fractures to the total pore volume of the system are obtained. The fractured zones estimated from these results agree approximately with the fractured zones estimated from drilling charts. This algorithm may be one of effective methods for the estimation of porosity distributions in a fractured geothermal reservoir.