... presents numerical modeling of flexural wave propagation for fast and slow formations to show that the ability to resolve the low-frequency asymptote of thin beds is a function of bed thickness and borehole and formation parameters. Specifically shown are the results of applying frequency semblance...

... Abstract Petrophysical analysis of inverted well logs includes the identification of bed boundaries and associated bed thickness values, for which it is convenient to define one set of boundaries expressed by all measurements. We have previously shown that an independent source of high axial...

... inspection of the full size core data, nuclear magnetic resonance T2 distributions, electrical borehole images and density logs. Secondly a large scale analysis is done over thousand of feet of log by comparing the statistical distribution of the bed thicknesses obtained from the multi-component induction...

... ABSTRACT Many oil and gas reservoirs contain significant volumes of recoverable hydrocarbons in intervals where the average bed thickness is below the resolution of conventional logging tools. The presence of thin beds increases the uncertainty in all approaches to hydrocarbon pore thickness...

... the true distribution of net sand, due to thin-bed and bed boundary effects. Moreover, cut-offs are very sensitive to variability of bed thickness, overall NTG and the nature of bed boundaries. A common tendency in conventional log analysis is to underestimate the proportion of thinly bedded sands...

... payquality rock. Detailed care description and ultra-violet photography indicate good to excellent oil staining in sand beds down to about 0.1 ft thick. This bed thickness is common in Lithofacies W. Thin sand beds in lithofacies W generally meet pay cutoff criteria set in the H and F facies and may have...

... boundary horizontal well shallow laterolog Upstream Oil & Gas bed thickness dual induction dual laterolog sonde log analysis induction borehole SPWLA Thirtieth resistivity SPWLA Thirtieth Annual Logging Symposium, June 11-14, 1989 ,- INDUCTION, RESISTIVITY AND MWD TOOLS IN HORIZONTAL...

... Upstream Oil & Gas log analysis induction shoulder bed effect Thickness real time system bed thickness correction chart bed thickness receiver investigation dual induction well logging attenuation correction chart RPA read rt apparent resistivity Schlumberger resistivity...

... Symposium Schlumberger log analysis bed thickness SP log membrane potential resistivity interpretation shaly sand Upstream Oil & Gas SP profile pseudo step profile sp center bed reading interface SPWLAllventy-EighthAnnualLoggingSymposium,June29-July2, 1987 SP DECONVOLUTION...

.... This feature is easily understood by displaying the actual survey and focusing current patterns. log analysis thin bed current pattern Symposium resistivity well logging bed thickness hole diameter dual laterolog Upstream Oil & Gas borehole Computation configuration borehole fluid deep...

.... The sensitivity of tool response to bed thickness is also investigated. well logging cnt-g tool response bed boundary porosity estimate Symposium log analysis detector sensitivity Porosity profile tool response apparent porosity calculation porosity boundary Upstream Oil & Gas bed...

... ABSTRACT The increased numbers of wells both onshore and offshore which must be directionally drilled to reach their intended objective has increased significantly in the past ten years. These directionally drilled wells show bed thickness to be too great, the amount depending upon...

... will tend toward lower water saturation, while adjacent beds with smaller pores will contain higher water saturation. This, in turn, causes a variation in resistivity from bed to bed. As bed thickness approaches or becomes less than the effective bed resolution of a tool, averaging occurs, and the resulting...

... and quantitative interpretation of Focus Log data. log analysis Thickness instrument ohmmeter current flow bed thickness borehole side bed correction well logging calculation invasion depth measure electrode apparent resistivity Upstream Oil & Gas invasion equation 7 geometrical factor...

... for the investigation were obtained with a resistor network analogue. Upstream Oil & Gas EMF parameter value resistivity apparent resistivity well logging SP amplitude amplitude SSP invasion bed thickness variable parameter determination conventional emf normalized area log analysis Thickness...