... upstream oil & gas variation drilling operation resolution borehole sensor sonic tool pitch-catch sensor spwla 61 slowness pitch-catch measurement symposium amplitude image caliper north referenced lwd tool june 24 anisotropy SPWLA 61st Annual Logging Symposium, June 24 to July 29...

... 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...

.... 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...

... 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...

... 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...

.... 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...

.... 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...

... 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...

... 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...

... 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...

... 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...

...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...

... 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...

... 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...

... 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...

... 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...

.... 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...

... electromagnetic devices provide a view of the evolution of borehole geometry with time, and evidence of microfractured intermediate formations leading to an accepted model of rock fragility as a major cause of hole failure during the drilling process. Phase derived caliper measurements of borehole compensated...

... 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...

... 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...