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Logging while drilling (LWD)

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Journal Articles
Journal: SPE Journal
SPE J. 25 (03): 1241–1258.
Paper Number: SPE-198288-PA
Published: 11 June 2020
... tools is the primary tool for coal identification, adding well trips to condition the hole and additional well costs for logging runs. In this paper, machine learning methods are applied to identify coals from drilling and loggingwhiledrilling (LWD) data to reduce overall well costs. Machine learning...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, November 18–19, 2019
Paper Number: URTEC-198288-MS
... and logging-while-drilling (LWD) data to reduce overall well costs. Machine learning algorithms include logistic regression (LR), support vector machine (SVM), artificial neural network (ANN), random forests (RF), and extreme gradient boosting (XGBoost). The precision, recall, and F1 score are used...
Proceedings Papers

Paper presented at the SPE/IADC Asia Pacific Drilling Technology, September 9–11, 1996
Paper Number: SPE-37157-MS
... Abstract Although at-bit measurements provide rapid detection of changing lithology, real-time logging-while-drilling (LWD) services are helpful in steering a horizontal well through the pay zone. Furthermore, these services provide the petrophysical data for formation evaluation...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-ZZ
... drilling was implemented to compute water salinities and saturations across the stacked layers. LWD (Logging-While-Drilling) data experiences limited drilling fluid invasion such that relatively shallow depth of investigation (DOI) measurements like capture sigma (Σ), which are sensitive to reservoir fluid...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13879426
...Characteristics of the collar wave in acoustic logging while drilling (LWD) Wei Guan* 1, 2, Yufeng Yang1 and Hengshan Hu 1 1 Harbin Institute of Technology, China; 2 University of California, Santa Cruz Summary The wavefields of the acoustic LWD with various drill collars are investigated by finite...
Proceedings Papers

Paper presented at the IADC/SPE Asia Pacific Drilling Technology Conference, August 22–24, 2016
Paper Number: SPE-180552-MS
..., throughout the development drilling campaign. The main objectives were to confirm fluid type and connectivity across the penetrated reservoirs, comparison of the logging-while drilling (LWD) data with existing wireline datasets to confirm drive mechanism and to aid in determining fluid contacts within...
Proceedings Papers

Paper presented at the SPE Europec featured at 78th EAGE Conference and Exhibition, May 30–June 2, 2016
Paper Number: SPE-180155-MS
... geosteering with the latest Logging-While-Drilling (LWD) technology was viewed as essential. This paper describes the placement of two wells, which benefited from active geosteering based on the data transmitted and interpreted in real-time. A multilayer bed boundary detection service was the primary source...
Proceedings Papers

Paper presented at the SPE Middle East Oil & Gas Show and Conference, March 8–11, 2015
Paper Number: SPE-172540-MS
..., and complex invasion profiles. Moreover, the accuracy of Archie's equation may suffer from variable cementation and saturation exponents and unknown water salinity. A recently introduced comprehensive suite of consonant logging-while-drilling (LWD) nuclear measurements with linear mixing laws, is used...
Proceedings Papers

Paper presented at the SPE Eastern Regional/AAPG Eastern Section Joint Meeting, October 11–15, 2008
Paper Number: SPE-119227-MS
... Oil & Gas wireline method application Drilling magnetic resonance borehole evaluation fracture Barnett shale optimization carbon content enlargement unconventional reservoir porosity connectivity wellbore image log SPE 119227 Formation Evaluation Logging While Drilling (LWD...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-0446
... Summary In the multipole acoustic logging while drilling (LWD), the detection of formation acoustic arrivals over tool mode contamination has been a challenging problem. By measuring the seismoelectric signal (seismoelectric signal refers to the electric field induced by seismic or acoustic...
Proceedings Papers

Paper presented at the 2004 SEG Annual Meeting, October 10–15, 2004
Paper Number: SEG-2004-0290
... logging stoneley mode monopole lwd tool low frequency corresponding semblance eccentricity upstream oil & gas drilling measurement logging while drilling waveform dipole synthetic waveform quadrupole drilling data acquisition borehole Effects of Tool Eccentricity on Acoustic Logging...
Proceedings Papers

Paper presented at the Offshore Mediterranean Conference and Exhibition, March 26–28, 2003
Paper Number: OMC-2003-051
.... The quality of LWD data allowed geosteering and proper formation evaluation, saving rig time, drilling and logging costs. kurkoskip?ndsloan? bestd reservoir characterization carpenter? paperb evans? holenkaj spwlanuallogingsymposium etal Log i ng W hil e D r ili ng ( LWD ) ens i t y I mages...
Journal Articles
SPE Res Eval & Eng 1 (06): 496–503.
Paper Number: SPE-52567-PA
Published: 01 December 1998
... shifted its focus from just directional MWD to a complete directional and logging while drilling (LWD) package. The LWD tools that are built into special drill collars provide measurements of resistivity, neutron, density, and gamma ray. Significant improvements in the reliability of the tools...
Proceedings Papers

Paper presented at the SPWLA 36th Annual Logging Symposium, June 26–29, 1995
Paper Number: SPWLA-1995-Y
... heterogeneous formation LWD tool reservoir lithology Symposium wireline density tool quadrant circumference density measurement spwla 36th resistivity tool SPWLA 36th Annual Logging Symposium, June X-29,1995 Characterization of a Heterogeneous Formation Using Azimuthal Logging-While- Drilling (LWD...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1992
Paper Number: OTC-6862-MS
... to evaluate because of invasion, which can cause wet zones to appear potentially oil bearing. The real time Logging While Drilling (LWD) system successfully identified hydrocarbon zones soon after drill bit penetration. Another benefit of the real time measurement was to provide accurate measurements in zones...
Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference, March 11–14, 1991
Paper Number: SPE-21989-MS
... Abstract Logging while Drilling (LWD)* tools are formation evaluation sensors engineered into drill collars. Using LWD in horizontal wells offers significant advantages over other logging systems for formation evaluation. When LWD is provided in real-time via mud pulse telemetry the system...
Images
Images
Formation evaluation from <b>logging</b> <b>while</b> <b>drilling</b> ( <b>LWD</b>), showing four produ...
Published: 08 October 2012
Fig. 3 Formation evaluation from logging while drilling ( LWD), showing four producing zones along the 730-m horizontal interval. More
Images
Proceedings Papers

Paper presented at the Offshore Mediterranean Conference and Exhibition, March 25–27, 2009
Paper Number: OMC-2009-089
... ABSTRACT: Searching for hydrocarbons in deep onshore and offshore targets often entails hightemperature/high-pressure drilling. Environmental or technical limitations that constrain drilling to wellbores of 5 ¾ in. or less may prohibit conventional logging-while-drilling (LWD) tools from...

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