... technology allows the measurement of high-resolution slowness data azimuthally as well as reflectivity and caliper images. The new LWD tool was run in both vertical and horizontal wells and directly compared with both wireline sonic and imaging tools. The inch-scale slownesses obtained show characteristic...

...SPWLA 60th Annual Logging Symposium, June 15-19, 2019 DOI: 10.30632/T60ALS-2019_T 1 NEW 4¾-IN. ULTRASONIC LWD TECHNOLOGY PROVIDES HIGH- RESOLUTION CALIPER AND IMAGING IN OIL-BASED AND WATER- BASED MUDS Peng Li, Jonathan Lee, Richard Coates, Rodney Marlow, Halliburton Copyright 2019, held jointly...

.... 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...

... inaccuracies exceed specifications. In order to compute an accurate photoelectric effect (PEF) and caliper that is derived from the individual short and long detector densities, the pre and post calibrations need to be utilized for processing the data. This blending process resulted in valid single detector...

.... This typically results in elongated (elliptical) wellbores that are frequently rugose along the axis of elongation. 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...

.... 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...

... possible application involves multistage drilling (Altoff, 1998, Bfrchak, 1993, Orbin, 1991).For all of these applications, accuracy in the ultrasonic measurement is imperative (usually to within ± 0.10" for caliper, and 0.05" for standoff). Larger errors can greatly effect the mud corrections...

... 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...

... of time of exposure, mud weight, flow rates and formation dip. For this purpose the use of phase and ultrasonic logging while drilling caliper measurements was considered, and while the cost and high risk of running this hardware in a severely deteriorated hole was recognized, the importance of acquiring...

... the following response equation was developed: I = qeSkP + F(c-t)(pt-eWkpf- e-b) + H where I = count rate (corrected for detector dead time) P = formation electron density pf = borehole fluid electron density c = caliper t = effective tool diameter E, F, k andH = constants The 4 constants are derived by running...

..., neutron porosity and density sensors. As in the case with comparable wireline measurements, measurement while drilling formation evaluation tools are dependent on the borehole condition and require a caliper measurement o correct for washouts. This caliper measurement is now available and is made using...