... advantage of directional permeability. In this manner one can stay in zone in CBM drilling just as in other horizontal applications. The use of at-bit gamma ray and inclination measurements in a Logging-While-Drilling (LWD) tool string greatly enhances the geosteering capabilities of the Bottom Hole...

... . PND-S™ cased-hole neutron porosity, similar to the compensated neutron porosity, is derived from its near detector (NEAR) to far detector (FAR) ratio. In the case of pulsed-neutron systems, the spatial distribution of capture gamma rays is used to measure the thermal neutron distribution. In refs. 1...

... Abstract A density-based porosity derived from the attenuation of gamma rays created by inelastic scattering of fast neutrons has been developed 1 , 2 , 3 for the Computalog PND-S pulsed neutron system. The utility of this cased-hole, density-based porosity is demonstrated in reservoir...

... spectral gamma ray, photoelectric, and bulk density data with generic neural network software. Such software allowed the relationship developed by the neural network to be translated into an equation that could be readily applied to all wells with the requisite log curves. Permeability was predicted using...

... crossover log analysis basin detection detector well logging apsc shaly sand sandstone porosity river basin cnl michael jardon gamma ray vertical resolution better gas identification upstream oil & gas geology clastic rock society of petroleum engineers porosity united states...

... Abstract A new directional gamma ray tool has been developed and is being incorporated into an innovative togging service. The service determines the azimuthal pattern of gamma ray emission from a completion material that has been tagged with a radioactive isotope. This paper discusses...

... ABSTRACT Five wells in the Big Horn Basin of Wyoming were perforated in the Phosphoria formation and subsequently treated with acid. Each of the acids was tagged with a radioactive isotope. Spectral gamma ray logs were then run to determine the effectiveness of the treatments. After processing...

... dynamics reservoir characterization gamma ray united states government rock type sedimentary rock mudstone comparison structural geology mudrock sandstone core analysis saturation shale calcite specimen wyoming moxa arch correction quartz INTRODUCTION The Gas Research Institute...

... value of ϕ T . S wB can be obtained from traditional shale indicators. (CYBERLOOK processing uses the SP, Gamma Ray, and ϕ N .) This leaves R wB and R wF to be determined. Going back to the formula for C 0 and changing to resistivity, we have R wM = R 0 ϕ T 2...

... and a detector system that can selectively discriminate and count the high energy gamma rays that result from the inelastic collisions of these neutrons with the atoms of carbon and oxygen. Figure 1 schematically reviews the source and time frame of neutron bombardment induced gamma radiation. Note...

... & Gas gamma ray MEV log analysis oxygen ratio neutron spe 5906 si co ratio well logging information porosity Carbon Log saturation calcium reaction count rate interpretation water salinity dolomite prob salinity rock type carbon SOCIETY OF PETROLEUM ENGINEERS OF AIME 6200 North...