PROCEDE D'ESTIMATION DE LA DENSITE DE FRACTURES DANS UN MILIEU ROCHEUX

The method involves measuring a number of intersections between fractures and a bore on a section from observations of a wall of the section, where the section is located at a depth. Conditional probability distribution of three-dimensional fracture density knowing the number of intersections is estimated. A three-dimensional fracture density value is determined at the depth by calculating an average of the probability distribution. Three-dimensional fracture density log is constructed by iterating measurement, estimation and determination operations for different depths. An independent claim is also included for a method for optimizing exploitation of an underground formation traversed by fractures and a bore.