.... Upstream Oil & Gas thorium environmental correction real time system detector borehole log analysis Spectral Gamma Ray Tool gamma ray borehole diameter spectra elemental concentration gamma ray tool potassium well logging uranium calibration facility Symposium characterization...

... Upstream Oil & Gas porosity measurement porosity environmental correction capture ratio dual-exponential fit Abstract A new cased-hole porosity measurement has been developed for a four-detector pulsed-neutron logging tool. The measurement is based on a capture count rate ratio from two...

... standard will stray from a reading that can be relied on to be quantitatively correct. Although this is a well-known fact and there are environmental corrections available, no standard has been defined on how to develop the corrections. Service companies have their own internal correction approaches...

... of the primary rock matrix types (limestone, quartz sandstone, and dolomite) from Monte Carlo calculations that were normalized to measurements performed in Halliburton's Tool Response and Characterization Laboratory (TRAC Lab) ( Gadeken et al. 2000 ) facility. Environmental corrections are required for non...

... is correct?" This paper discusses some reasons for these differences, and why the answer to the above question is usually "neither". The reasons why wireline depth may require some environmental corrections are discussed, and a technique for estimating these corrections is presented. Whilst this may have...

... thickness, borehole and formation fluid types, and tubing placement within the borehole. 10 Several hundred measurements in the pits were used in an established C/O model 6 , 9 , 10 to develop algorithms and environmental corrections. Log curves are environmentally corrected to a standard set...

...^ thinly Sand Shale Sequence log analysis Sand Resistivity Estimate well logging macroscopic anisotropy Upstream Oil & Gas environmental correction sensitivity analysis 1997. Society of Petroleum Engineers ...

... Abstract Environmental corrections to formation capture cross-section values (∑ nf ) measured with the new TMD-L tool are illustrated for a wide range of borehole conditions. A porosity transform for the near-far count-rate ratio is also developed. Test-pit measurements cover a range...

... in the calculation of economic reserves. This examination of the differences between LWD and wireline logs and consideration of how these differences affect formation evaluation focuses on the following topics: Differences in sensor physics Basic reference standards Environmental corrections Filtrate...

... mud effect neutron miscibility pressure porosity determination upstream oil & gas gas-bearing formation oil-base mud well logging environmental correction porosity correction geology drilling fluids and materials petroleum engineer hydrogen atom borehole united states government...