...ABSTRACT ABSTRACT Neutron-porosity measurement is important for quantifying reservoir assets and optimizing production. The neutron-gamma porosity measurement is common for cased-hole logging. Since pulsed-neutron logging is the primary downhole technology for current residual hydrocarbon...

... Upstream Oil & Gas spwla 59 pulsed neutron detector neutron neutron tool well logging porosity measurement neutron porosity slowing-down length salinity effect formation response log analysis burst ratio porosity borehole effect Symposium capture ratio neutron porosity...

... several hundreds of porosity measurements on source rock both on shale gas and shale oil. Quality control hinges on redundancy using Laboratory NMR, total and solid volumes and material balance measurements. These comparisons highlight discrepancies in porosity between techniques up to 20%. Different...

... in precision at lower porosities. Modeling, laboratory experiments, and field data are used to demonstrate these limitations and improvements. log analysis detector porosity measurement porosity neutron detection variation detection Halliburton CH porosity Upstream Oil & Gas modeling...

...SPWLA 51st Annual Logging Symposium, June 19-23, 2010 1 Applications of Triple Neutron Porosity Measurements in Gas Shales and Shaly Sands Paul Boonen, Zhipeng Liu, Libai Xu, Cornelis Huiszoon (SMITH-PathFinder), and Ward Schultz (consultant) Copyright 2010, held jointly by the Society...

... ABSTRACT: Epithermal and thermal-neutron porosity measurements each have distinct advantages and disadvantages. Foremost, epithermal neutron porosity is less sensitive to the neutron absorbers found in saline water and certain clays. However, epithermal neutron measurements typically suffer...

... US government MeV neutron well logging mev source porosity log analysis detector sensitivity Upstream Oil & Gas porosity measurement neutron porosity response clay mineral am-be source shale effect source effect neutron source Symposium limestone neutron investigation...

... as 5 inches is discussed. It includes a standard Cesium-137 source for the density measurement and a Californium-252 neutron source for the porosity measurement. This neutron source provides a neutron output comparable to a conventional Americium-Beryllium (Am-Be) source but with three orders...

... count rate yields a modified ratio that is insensitive to geometric perturbations that occur near the tool. This modified ratio results in a porosity measurement that is borehole invariant - a measurement that virtually needs no correction for washouts, rugosity, borehole shape or tool standoff...

... Mickael environmental correction correction characterization new tool porosity measurement separation core data count rate core porosity western atlas agreement SPWLA 37th Annual Logging Symposium, June 16-19,1996 FIELD EXPERIENCES WITH A NEW COMPENSATED NEUTRON TOOL H.-C. Freitag, M.W...

... concentration Upstream Oil & Gas porosity measurement Symposium neutron porosity measurement Potassium Concentration well logging standoff sonde concentration porosity compensation environmental effect count rate time distribution precision SPWLA 32nd Annual Logging Symposium, June 16-19...

... log analysis stabilizer borehole well logging CDN tool formation density density measurement SPWLA Thirtieth AnnualLoggingSymposium Upstream Oil & Gas drill collar gamma ray Drilling correction standoff detector porosity measurement porosity neutron porosity measurement...

...SPWLA Twenty-Ninth Annual Logging Symposium, June 5-8, 1988 FORMATION POROSITY MEASUREMENT WHILE DRILLING M. Evans, P. Wraight, E. Marienbach, E. Rhein-Knudsen, and D. Best Schlumberger Well Services, Houston, Texas Abstract Recent improvements in neutron detector technology have led...

... of these basic porosity logs it is possible to obtain accurate porosity measurements which would be impossible with any one of the logs by itself. The reliability and accuracy of the neutron log for this purpose is shown to be superior to previously described logs provided a special type of instrument...

... Upstream Oil & Gas Boyle log data log analysis washburn-bunting method pore summation well logging accuracy calibration porosity value effective porosity Porosity determination determination equation log analyst calculation porosity measurement characteristic resistivity...