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Total Porosity and Bound-Fluid Measurements From an NMR Tool
Journal of Petroleum Technology, 1997New measurements recently available from a pulse-echonuclearmagnetic-resonance (NMR) tool enhance the usefulness of this logging technique. These include total NMR porosity and bound-fluid measurements. TotalNMR porosity provides a complete analysis of a reservoir's fluid volumes, including what is trapped in the very smallest pores associated with ...
Greg Gubelin, Austin Boyd
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Measurement of Total NMR Porosity Adds New Value to NMR Logging
5th International Congress of the Brazilian Geophysical Society, 1997The CMR* Combinable Magnetic Resonance logging tool has been upgraded to provide a robust measurement of clay bound water and microporosity. The upgraded measurement is now possible because of a 50% increase in the signal-to-noise (SIN) ratio, a decrease in the minimum echo spacing from 0.32 ms to 0.2 ms and improved signal processing software that has
R. Freedman +5 more
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A Field Measurement of Total Porosity and Surface Microrelief of Soils
Soil Science Society of America Journal, 1963Abstract Total porosity of the layer to be plowed was estimated from undisturbed cores collected before primary tillage. Using a point quadrant instrument, soil surface elevation measurements were made before and after preplant tillage, and after each cultivation to determine the effects of tillage on total porosity of the plowed ...
R. E. Burwell +2 more
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The effect of filter type and porosity on total suspended sediment determinations
Analytical Methods, 2018Glass fiber filters and cellulose ester membranes from 0.4 to 3.0 μm yielded similar results up to 20 000 mg L−1 of TSS.
Daniele Kasper +2 more
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[Formulation optimization of controlled porosity osmotic-pump tablets of total paeony glycosides].
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2009To prepare controlled porosity osmotic-pump tablets of total paeony glycosides (TPG) and establish the relationship between formulation factors of membrane and drug release rate.Uniform design was used to achieve the quantitative relationship between the release rate and formulation factors of membrane.
Hui, Zhang, Wen-Ping, Wang
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Total Porosity of Tight Rocks: A Welcome to the Heat Transfer Technique
Energy & Fuels, 2016Total rock porosity is a key parameter in a wide range of disciplines from petroleum to civil and mining engineering. Porosity is particularly important in petroleum engineering applications, e.g., from estimation of hydrocarbon in place to prediction of geomechanical properties. Conventional techniques used to measure the total porosity, i.e., mercury
Roshan, H. +9 more
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Measurements of Clay-Bound Water and Total Porosity by Magnetic Resonance Logging
SPE Annual Technical Conference and Exhibition, 1996Abstract Pulsed nuclear magnetic resonance (NMR) logging has until now been limited to measurements of capillary bound water and of free fluids, the sum of which is considered the "effective porosity" of rock. Clay-bound water and fluids trapped in micropores generally exhibit NMR relaxation times too fast to be ...
M.G. Prammer +6 more
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The APPEA Journal, 1996
Use of petrophysical evaluation models that rely on predicting mineral composition of reservoir rocks is becoming more prevalent in the oil industry. Evaluation tools such as Schlumberger's Elan or Mincom's Geolog/Multimin allow prediction of variability in reservoir composition and petrophysical parameters. These are particularly useful in cases where
R. K. Penney, S.Y. Looi
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Use of petrophysical evaluation models that rely on predicting mineral composition of reservoir rocks is becoming more prevalent in the oil industry. Evaluation tools such as Schlumberger's Elan or Mincom's Geolog/Multimin allow prediction of variability in reservoir composition and petrophysical parameters. These are particularly useful in cases where
R. K. Penney, S.Y. Looi
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Journal of Biomedical Materials Research Part A, 2007
AbstractStress shielding from the presence of a femoral component can cause adverse changes to cortical bone geometry and porosity leading to increased fracture risk in the periprosthetic cortical bone. The objectives of this study were to determine if porosity increased after total hip arthroplasty along the principal axes, and to determine if a ...
Teri G, Rosenbaum Chou +5 more
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AbstractStress shielding from the presence of a femoral component can cause adverse changes to cortical bone geometry and porosity leading to increased fracture risk in the periprosthetic cortical bone. The objectives of this study were to determine if porosity increased after total hip arthroplasty along the principal axes, and to determine if a ...
Teri G, Rosenbaum Chou +5 more
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New Analytical Method To Calculate Matrix- and Fluid-Corrected Total Porosity in Organic Shale
SPE Reservoir Evaluation & Engineering, 2014Summary Estimation of total porosity from neutron and density porosity logs in organic shale (source rock) is challenging because these logs are substantially affected by fluid and matrix-composition effects. Conventional interpretation of neutron and density porosity logs often includes corrections for shale concentration in which the ...
Edwin Ortega(ConocoPhillips) +1 more
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