Abstract: A well-logging method for a geological formation having a borehole therein may include collecting a plurality of nuclear magnetic resonance (NMR) snapshots from the borehole indicative of changes in the geological formation and defining NMR data. The method may further include identifying a plurality of fluids within the geological formation based upon the NMR data, determining respective NMR signatures for the identified fluids based upon the NMR data, determining apparent volumes for the identified fluids based upon the NMR signatures, and determining adjusted volumes for the identified fluids based upon the apparent volumes.

Abstract: This disclosure relates to methods and apparatuses for determining the porosity of a formation surrounding a borehole. A drilling fluid penetrates a distance into the formation as a function of time. First and second porosity measurements are taken, both at a first time and at a second time. The first porosity measurement is of a type selected to indicate a different porosity measurement in the presence of a gas as compared to the second porosity measurement. The first and second porosity measurements are selected to have substantially the same depth-of-investigation into the formation and are affected approximately proportionally by the gas.

Abstract: A method for detecting a drill string washout event. The method includes locating a drill string in a wellbore formed in a subterranean formation. A drilling fluid is pumped into the drill string. The drill string includes a turbine that spins in response to the drilling fluid flowing therethrough. A comparison is made between a rate that the drilling fluid is pumped into the drill string and a spin rate of the turbine. A defect is determined to be formed in the drill string based upon the comparison.

Abstract: A well-logging method for a geological formation having a borehole therein may include collecting a plurality of nuclear magnetic resonance (NMR) snapshots from the borehole indicative of changes in the geological formation and defining NMR data. The method may further include identifying a plurality of fluids within the geological formation based upon the NMR data, determining respective NMR signatures for the identified fluids based upon the NMR data, determining apparent volumes for the identified fluids based upon the NMR signatures, and determining adjusted volumes for the identified fluids based upon the apparent volumes.

Abstract: A method for determining at least one characteristic of a geological formation having a borehole therein may include collecting first and second dataset snapshots of the geological formation from the borehole. The method may further include generating a differential dataset based upon the first and second dataset snapshots, determining a multi-dimensional space based upon the differential dataset, and generating a first hybrid dataset based upon the first dataset snapshot by projecting the measurement data from the first dataset snapshot parallel to the multi-dimensional space and onto a complementary multi-dimensional space not parallel to the multi-dimensional space.

Abstract: This disclosure relates to methods and apparatuses for determining the porosity of a formation surrounding a borehole. A drilling fluid penetrates a distance into the formation as a function of time. First and second porosity measurements are taken, both at a first time and at a second time. The first porosity measurement is of a type selected to indicate a different porosity measurement in the presence of a gas as compared to the second porosity measurement. The first and second porosity measurements are selected to have substantially the same depth-of-investigation into the formation and are affected approximately proportionally by the gas.

Abstract: A logging tool having a plurality of different sensor types having close spacings mounted on an articulated or extendible pad, a sleeve, a mandrel, a stabilizer, or some combination of those is provided and used to make measurements in a wellbore in a single logging run. Those measurements are used to create images of the wellbore and the images are used to deduce the local geology, optimize well placement, perform geomechanical investigation, optimize drilling operations, and perform formation evaluation. The logging tool includes a processor capable of making those measurements, creating those images, performing those operations, and making those determinations. The plurality of different sensors may be one or more resistivity sensors, dielectric sensors, acoustic sensors, ultrasonic sensors, caliper sensors, nuclear magnetic resonance sensors, natural spectral gamma ray sensors, spectroscopic sensors, cross-section capture sensors, and nuclear sensors, and they may be “plug-and-play” sensors.