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Keywords: caliper
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Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-T
... caliper and acoustic impedance images, independent of the mud type used. Analysis of data sets collected in oil-based mud with varying mud weights under multiple drilling conditions are provided, highlighting the suitability of the imaging technology for multiple while-drilling applications. Log data...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-C
.... They are equally useful for diagnosing operations issues, for example by identifying loss zones, investigating wellbore enlargement and creating pseudo calipers for cementing calculations. The paper will demonstrate that the total value which can be delivered from time lapse LWD far exceeds that derived from...
Proceedings Papers

Paper presented at the SPWLA 53rd Annual Logging Symposium, June 16–20, 2012
Paper Number: SPWLA-2012-194
... BHA lateral motion trajectory borehole shape borehole wall acoustic transducer vector algorithm MWD drilling measurement logging while drilling borehole geometry transducer approximation polygon geometry Symposium caliper SPWLA 53rd Annual Logging Symposium, June 16-20, 2012 1...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-QQ
... Carlo N-Particle (MCNP) modeling is used to review this finding and investigate a method to define the amount of metal loss that can be tolerated before compensated density measurement inaccuracies exceed specifications. In order to compute an accurate photoelectric effect (PEF) and caliper...
Proceedings Papers

Paper presented at the SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-32567
.... Virtually all wireline-conveyed open hole density logging tools incorporate a mechanical caliper to ensure pad contact with the borehole wall. In elongated wellbores, poor density data is often acquired, as this design predisposes the tool to rotate into the long (rough) axis of the hole. Various short-axis...
Proceedings Papers

Paper presented at the SPWLA 47th Annual Logging Symposium, June 4–7, 2006
Paper Number: SPWLA-2006-BBBB
.... By using these two curves, a better formation density is computed. A hole caliper was also available by using LWD- VDN*. This caliper is based on the difference between the two density sensors. It was noted an increasing hole size from 8 ½ up to 9 ½ in the sand zones, explaining the density corrections...
Proceedings Papers

Paper presented at the SPWLA 47th Annual Logging Symposium, June 4–7, 2006
Paper Number: SPWLA-2006-CCC
... measurements from the two transducers are used to calculate independent caliper measurements and to form independent sets of standoff-weighted neutron and density data, resulting in improved reliability and quality control. Features of the transducer design which enable the transducers to operate over a wide...
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-II
... the bottom caliper and lock it into the breakout groove, so that the sourced tool would read competent rock across the breakout interval. The problem with this method became apparent when the opposite situation occurred and the sourced density pad locked into the breakout. The current solution...
Proceedings Papers

Paper presented at the SPWLA 46th Annual Logging Symposium, June 26–29, 2005
Paper Number: SPWLA-2005-QQ
... to the borehole size (caliper. Thus the prediction of the open hole caliper curve from PNC measurements with the NNE will also be discussed and evaluated. well logging log analysis Upstream Oil & Gas RINC Artificial Intelligence density prediction formation density Halliburton Energy Service...
Proceedings Papers

Paper presented at the SPWLA 41st Annual Logging Symposium, June 4–7, 2000
Paper Number: SPWLA-2000-P
...SPWLA 41 Annual Logging Symposium, June 4-7,200O MUD VELOCITY CORRECTIONS FOR HIGH ACCURACY STANDOFF/CALIPER MEASUREMENTS Eric Brian Molz Baker-Hughes Inteq ABSTRACT Ultrasonic measurement of the tool standoff and borehole diameter has many established uses in the well logging community...
Proceedings Papers

Paper presented at the SPWLA 40th Annual Logging Symposium, May 30–June 3, 1999
Paper Number: SPWLA-1999-YY
... borehole induction tool well logging ait tool mud resistivity Schlumberger algorithm real time system Upstream Oil & Gas diameter coefficient Symposium log analysis chart-based flag caliper estimation compute mud resistivity resistivity spwla 40 resolution AIT log Barber magnetic...
Proceedings Papers

Paper presented at the SPWLA 39th Annual Logging Symposium, May 26–28, 1998
Paper Number: SPWLA-1998-III
... ABSTRACT Several Measurement-While-Drilling (MWD) caliper tools, which utilize acoustic technology, are available to the industry (Moake 93, Orban 91), but they typically have a limited operating range and are based on analog detection techniques. Technical issues which could preclude the use...
Proceedings Papers

Paper presented at the SPWLA 39th Annual Logging Symposium, May 26–28, 1998
Paper Number: SPWLA-1998-BBB
... maximum density porosity density porosity spwla 39th density measurement Density correction borehole condition porosity value Symposium horizontal well caliper photoelectric factor University neutron porosity correction resistivity vertical well SPWLA 39th Annual Logging Symposium, May...
Proceedings Papers

Paper presented at the SPWLA 37th Annual Logging Symposium, June 16–19, 1996
Paper Number: SPWLA-1996-EE
... Halliburton wireline log well logging University lower transmitter good agreement borehole Symposium caliper clss tool SPWLA 37th Annual Logging Symposium, June 16-19,1996 FIELD TESTS OF AN ACOUSTIC LOGGING-WHILE-DRILLING TOOL IN VARIOUS BOREHOLE ENVIRONMENTS by Dale R. Heysse, Carl Robbins...
Proceedings Papers

Paper presented at the SPWLA 37th Annual Logging Symposium, June 16–19, 1996
Paper Number: SPWLA-1996-V
.... The weighted standoff is used to dynamically correct the neutron log. Furthermore, measurements made with the standoff transducer and two other ultrasonic transducers, located at 120-degree intervals around the tool, are combined to make a caliper measurement while drilling. The caliper is used to apply...
Proceedings Papers

Paper presented at the SPWLA 33rd Annual Logging Symposium, June 14–17, 1992
Paper Number: SPWLA-1992-NN
... diameter wireline tool real time system resolution Laterolog log analysis Samworth dipmeter Upstream Oil & Gas transit time requirement Symposium bpb wireline service correction equation compensation caliper density log electrode SPWLA 33rd Annual Logging Symposium, June 14-17, 1992...
Proceedings Papers

Paper presented at the SPWLA 31st Annual Logging Symposium, June 24–27, 1990
Paper Number: SPWLA-1990-F
... and require a caliper measurement to correct for washouts. This caliper measurement is now available and is made using a non-mechanical sensor which computes the effective diameter of a non-uniform borehole. This calculation is achieved by using pairs of detector banks which have been both azimuthally...

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