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Keywords: separation
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Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0059
... Janeiro, Brazil, May 18-22, 2024. slowness characteristics behind the casing. The proposed method has already tested by many synthetic examples and field examples (in both vertical and horizontal wells), which verify its efficiency in ABSTRACT separating and enhancing the weak formation signals behind...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0021
... oil zones. The effort has been a great success story until recent years. In parts of the field with strong water influx, a wide density-neutron log separation is observed along parts of the horizontal sections of the production wells. Following the classic interpretation, these sections are regarded...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-SS
... Upstream Oil & Gas Shale interval Artificial Intelligence Brine porosity shale log analysis gamma ray index sand model shale fraction Symposium spectral gamma log petrophysical model shale type fraction separation well logging sandy interval spwla 59 mineralogy...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-OOO
... variations in the formation-water salinity. well logging dielectric measurement porosity Upstream Oil & Gas oil production salinity transmitter Symposium log analysis invasion profile permittivity conductivity invasion movability reservoir equation spwla 58 separation frequency...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-DDDD
... with oil gravities ranging from 8 to 15 API. In mobile oil sands, the curve separation varied with the oil movement. In immobile oil sands, the curves overlaid. Nuclear magnetic resonance data confirmed the interpretation. The quicklook enabled well-to-well and sand-to-sand mobility comparisons and showed...
Proceedings Papers

Paper presented at the SPWLA 54th Annual Logging Symposium, June 22–26, 2013
Paper Number: SPWLA-2013-III
... lithology resistivity separation Abstract Following the implementation of pulsed neutron generator (PNG) technology in logging-while-drilling (LWD) tools, the measurement of formation sigma (Σ, thermal neutron capture cross section) was introduced as a measurement used for water saturation...
Proceedings Papers

Paper presented at the SPWLA 54th Annual Logging Symposium, June 22–26, 2013
Paper Number: SPWLA-2013-NNN
... invasion depth sigma log resistivity separation invasion cross section SPWLA 54 th Annual Logging Symposium, June 22-26, 2013 1 MULTIDETECTOR LWD SIGMA LOGGING PRINCIPLES, PETROPHYSICAL APPLICATIONS, AND ENVIRONMENTAL EFFECTS Edwin Ortega, and Carlos Torres-Verdín, The University of Texas at Austin...
Proceedings Papers

Paper presented at the SPWLA 54th Annual Logging Symposium, June 22–26, 2013
Paper Number: SPWLA-2013-ZZZ
...-induced fracture curve order fracture spwla 54 Symposium resistivity measurement Drilling log analysis modeling shale surfactant resistivity separation run 9 SPWLA 54 th Annual Logging Symposium, June 22-26, 2013 1 A SYNOPSIS OF OIL-BASED MUD EFFECTS ON WIRELINE AND LWD RESISTIVITY LOGS...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-VVV
... an approaching boundary from several feet. Numerical and experimental modeling have been performed for a wide variety of resistivity contrasts and transition types. Graphical representations of the results suggest a near-exponential dependency on the distance separating the well path from the boundary...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-NN
... neutron Upstream Oil & Gas rfq factor effective permeability Symposium log analysis dynamic petrophysical property porosity rock type mud-filtrate invasion separation density log rock classification resistivity measurement permeability well logging petrophysical property movable gas...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-53450
... neutron porosity measurement separation ABSTRACT: Gas shales are unconventional reservoirs but are becoming increasingly important. Formation evaluation of shaly sands in general and gas shales in particular is complicated. The traditional cross-over of density and neutron porosity logs is often...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-40710
... exhibit substantial invasion effects as evidenced by the separation of apparent resistivity logs (both LWD and wireline) with multiple radial lengths of investigation. In extreme cases, apparent resistivity logs "stack" because of very deep invasion. We diagnose and quantify invasion effects...
Proceedings Papers

Paper presented at the SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-26949
..., or sigma, is sensitive to the presence of strong thermal absorbers. Chlorine present in formation water is one such absorber that is not present in any hydrocarbons. Upstream Oil & Gas curve separation investigation log analysis detector borehole well logging filtrate invasion salinity...
Proceedings Papers

Paper presented at the SPWLA 49th Annual Logging Symposium, May 25–28, 2008
Paper Number: SPWLA-2008-K
..., borehole fluid, cement sheath quality, and borehole size, all contribute to the borehole signal that must be separated from the total signal to obtain an accurate formation thermal capture cross-section, Σ. The physics of the process dictates that this decay is exponential, and thus the measurement...
Proceedings Papers

Paper presented at the SPWLA 49th Annual Logging Symposium, May 25–28, 2008
Paper Number: SPWLA-2008-JJJJ
... the volume of investigation. log analysis attenuation dielectric assumption frequency dielectric permittivity conductivity Upstream Oil & Gas Propagation Resistivity measurement frequency formation conductivity equation rock dielectric constant separation well logging resistivity...
Proceedings Papers

Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-QQQ
... reservoir anisotropy resistivity separation Abstract In recent years, increased attention has been placed on the development of heavy oil reserves in the Orinoco heavy oil belt of Eastern Venezuela with several ongoing projects and more on the way. Petrolera Ameriven (PA), an operating agent...
Proceedings Papers

Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-GGG
... well logging log response resistivity response curve separation Upstream Oil & Gas spwla 48 log analysis modeling variation sandstone Symposium resistivity borehole inversion hole size true resistivity eccentricity effect resistivity measurement separation resistivity data...
Proceedings Papers

Paper presented at the SPWLA 47th Annual Logging Symposium, June 4–7, 2006
Paper Number: SPWLA-2006-UUU
... spwla 47 mudcake thickness excellent estimate resistivity separation SPWLA 47th Annual Logging Symposium, June 4-7, 2006 1 Estimation of flushed zone and mudcake parameters using a new micro-resistivity pad device Gulamabbas Merchant, Hans-Martin Maurer, Z. Zhou Baker Hughes Copyright 2006, held...
Proceedings Papers

Paper presented at the SPWLA 46th Annual Logging Symposium, June 26–29, 2005
Paper Number: SPWLA-2005-KK
... prior to the days of petro-free mud revealed that unexpected N/D separations had also been observed in high GOR reservoirs using standard oil-based mud (OBM4] The above issues pose a challenge in obtaining reliable, unambiguous nuclear tool interpretation using exotic muds and previous work...
Proceedings Papers

Paper presented at the SPWLA 46th Annual Logging Symposium, June 26–29, 2005
Paper Number: SPWLA-2005-S
... curve geertsma model application travel time bulk modulus Artificial Intelligence porosity compressional Krief equation separation interpretation Gassmann SPWLA 46th Annual Logging Symposium, June 26-29, 2005 1 PETROPHYSICAL ROCK PHYSICS MODELING: A COMPARISON OF THE KRIEF AND GASSMANN...

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