Abstract: A method of detecting significant events intersecting a borehole from an image of the borehole wall having: (a) converting the image into a three-dimensional orientation space; (b) selecting a parameter relation that represents the intersection of an event (3,5 and 6) with the borehole wall; (c) creating a parameter space consisting of numbers as a function of the parameters, wherein each number is a measure of the support in the orientation space for an event characterized by the parameters that pertain to that number; (d) selecting in the parameter space a set of the largest numbers, wherein the parameters that pertain to each of these largest numbers represent the intersections of the significant events with the borehole wall; and (e) presenting the intersections pertaining to the set of the largest numbers as a list of data representing significant events.

Abstract: A method for measuring in situ formation fluid flow utilizing an NMR logging while drilling tool is disposed in the borehole, a modified saturation recovery or time of flight angiography pulse sequence is utilized to tag spins in the formation, at least two measurements are made of the tagged spins as they propagate toward the borehole in the under-balanced environment, allowing a determination of fluid velocity, from which permeability may be determined. Techniques are disclosed to perform the method in both an over-balanced and under-balanced environment.

Abstract: A method for measuring in situ formation fluid flow utilizing an NMR logging while drilling tool is disposed in the borehole, a modified saturation recovery or time of flight angiography pulse sequence is utilized to tag spins in the formation, at least two measurements are made of the tagged spins as they propagate toward the borehole in the under-balanced environment, allowing a determination of fluid velocity, from which permeability may be determined. Techniques are disclosed to perform the method in both an over-balanced and under-balanced environment.

Abstract: Method of detecting significant events intersecting a borehole from an image of the borehole wall comprising (a) converting the image into a three-dimensional orientation space; (b) selecting a parameter relation that represents the intersection of an event (3, 5 and 6) with the borehole wall; (c) creating a parameter space consisting of numbers as a function of the parameters, wherein each number is a measure of the support in the orientation space for an event characterized by the parameters that pertain to that number; (d) selecting in the parameter space a set of the largest numbers, wherein the parameters that pertain to each of these largest numbers represent the intersections of the significant events with the borehole wall; and (e) presenting the intersections pertaining to the set of the largest numbers as a list of data representing significant events.