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Keywords: formation density
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Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0094
... importantly, the quality of cement, which is difficult to evaluate quantitatively downhole, casts a significant impact on formation density measurement. To obtain accurate thru-casing density in scenarios where cement information is incomplete or uncertain, a new interpretation model is introduced...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0046
... as the density of the annular material. This is particularly important to evaluate as the annulus fill varies between gas, formation water, drilling and completion fluids, and accumulated fines. The longer spacing detector measurements are then used in conjunction with pre-existing open-hole formation density...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0065
... to open-hole wells. Several studies have indicated that it is feasible to measure formation density using a density logging tool in cased well under certain conditions, of which the key problem is to determine casing thickness, cement thickness and cement density. This study proposes a novel method...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0047
... the four-detector responses. This algorithm is validated against actual logging data and show a better though-casing evaluation than when using three or two detectors. In this work a case story using the four-detector tool to obtain through-casing formation density and using the algorithm mentioned above...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0066
... cement ring thickness forward model casing thickness thickness formation density cement ring density Abstract In order to better evaluate the formation density, casing and cement ring integrity under casing well conditions, a high precision four detector density logging tool was designed...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-G
... and experimental data prove that the physics of the formation density measurement using a sonde with an X-ray generator and scintillation detectors can be described in the same way as the traditional density measurement, which is based on a monoenergetic gamma ray source. Although the 137 Cs gamma-ray source...
Proceedings Papers

Paper presented at the SPWLA 54th Annual Logging Symposium, June 22–26, 2013
Paper Number: SPWLA-2013-BBB
... gamma ray imaging tool has been used to study the DI at various dip angles, formation densities and borehole environmental conditions. To benchmark the simulation model, an experimental tank was built with a low- and a high-activity formation at a 45° angle intersected by a vertical borehole...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-KKK
... of a viable sourceless alternative creates a problem for the industry. The fact that formation density and neutron porosity measurements are used for much more than just formation porosity complicates the issue considerably. This paper examines some of the potential benefits of using neutron generators...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-49618
...SPWLA 51st Annual Logging Symposium, June 19-23, 2010 1 FORMATION DENSITY MEASUREMENTS IN CASED WELLBORES FOR GAS SATURATION ANALYSIS Ronald Plasek, Consultant, Laurent Mossé, and James Hemingway, Schlumberger Copyright 2010, held jointly by the Society of Petrophysicists and Well Log Analysts...
Proceedings Papers

Paper presented at the SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-73568
... well logging filtrate invasion neutron porosity Upstream Oil & Gas GGD measurement investigation resolution formation density density measurement log analysis detector porosity Symposium NGD measurement reservoir spwla 50 hydrocarbon density LWD tool invasion SPWLA 50th...
Proceedings Papers

Paper presented at the SPWLA 49th Annual Logging Symposium, May 25–28, 2008
Paper Number: SPWLA-2008-P
... specifications. log analysis porosity error well logging Upstream Oil & Gas formation density calibration track 4 log data synthetic log data dynamic calibration standoff detector mud weight Symposium in-situ calibration bulk density spwla 49th pre-job calibration tool wear density...
Proceedings Papers

Paper presented at the SPWLA 47th Annual Logging Symposium, June 4–7, 2006
Paper Number: SPWLA-2006-YYY
... porosity barite content Upstream Oil & Gas formation density Computation log analysis mud weight diameter barite concentration borehole size determination density caliper standoff hole size spwla 47 well logging borehole apparent mud weight Symposium resistivity caliper SPWLA...
Proceedings Papers

Paper presented at the SPWLA 46th Annual Logging Symposium, June 26–29, 2005
Paper Number: SPWLA-2005-QQ
... technique also recently developed is to obtain a transform of the PNC measurements directly into formation density by applying a neural network ensemble (NNE. In this case, a well (the training well having both a density log and a PNC log must be available. The effects of the borehole environment...
Proceedings Papers

Paper presented at the SPWLA 45th Annual Logging Symposium, June 6–9, 2004
Paper Number: SPWLA-2004-G
... logging tools were developed to exploit this sensitivity; however, none of these experimental prototypes has been developed into a commercial service. This study analyzes the response of a three-detector wireline density tool to formation density in cased wells. The tool response was experimentally...
Proceedings Papers

Paper presented at the SPWLA 43rd Annual Logging Symposium, June 2–5, 2002
Paper Number: SPWLA-2002-BBB
... Upstream Oil & Gas porosity formation formation density algorithm formate drilling fluid spwla 43 formate nuclear log correction cesium formate formate brine porosity Symposium invasion drilling fluid borehole formate mud interpretation University SPWLA 43 rd Annual Logging...
Proceedings Papers

Paper presented at the SPWLA 38th Annual Logging Symposium, June 15–18, 1997
Paper Number: SPWLA-1997-K
... sensor measurements in order to derive corrected formation density as a function of the detector count rates. In this paper, we discuss a measurement analysis technique based on physical response models of the sensors. These models predict the tool response as a function of various physical...
Proceedings Papers

Paper presented at the SPWLA 37th Annual Logging Symposium, June 16–19, 1996
Paper Number: SPWLA-1996-JJ
...SPWLA 37th Annual Logging Symposium, June 16-19,1996 Developments in Understanding the Physical Foundations of Formation Density and Lithology Logging Daniel C. Minette Baker Hughes INTEQ 2001 Rankin Road Houston, TX ABSTRACT Over the last few years, the fundamentals of formation density...
Proceedings Papers

Paper presented at the SPWLA 36th Annual Logging Symposium, June 26–29, 1995
Paper Number: SPWLA-1995-UU
... standoff is experienced uring part of the tool rotation. Since changes in count rate indicate variation in standoff, the effectiveness of the method requires a minimum amount of mud to formation density contrast. However, in situations where the lack of contrast reduces the effectiveness of the method...

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