Results 141 to 150 of about 3,047 (185)

Logging-While-Drilling (LWD)

2016
The crucial element in logging that has so far been covered up, is the wellbore and the drilling process that creates it. Although it is beyond the scope of this volume to discuss drilling, there are several aspects that merit mention in their relationship to logging.
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An LWD Tool Suite for Formation Evaluation in HPHT Environments

Proceedings of SPE Annual Technical Conference and Exhibition, 2007
Abstract The tool suite that is introduced in this paper provides Logging-While-Drilling (LWD) formation evaluation with tools rated up to 350°F (175°C) and 25,000 psi (172.4 MPa). These ratings qualify as High Pressure High Temperature (HPHT) environments for LWD services, where the standard ratings are much lower.
A. Rennie, P. Boonen
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Operational and Environmental Safety With Nuclear LWD Tools

Proceedings of SPE Health, Safety and Environment in Oil and Gas Exploration and Production Conference, 1994
Abstract After several decades of use, resistivity, formation density and neutron porosity measurements are considered fundamental to formation evaluation. In the last decade, logging-while-drilling (LWD) formation density and neutron porosity tools utilizing chemical radioactive sources have been added to resistivity, gamma ray ...
J. D. Aitken, J. M. Holenka, D. E. Torbett, K. W. Turner   +3 more
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LWD quadrupole shear measurement in anisotropic formations

SEG Technical Program Expanded Abstracts 2003, 2003
Acoustic quadrupole waves have recently been introduced to measure formation shear velocity under LWD conditions. Field applications have created demands for understanding of the tool behavior in anisotropic formations. In this study, we investigate what the tool measures in a transversely isotropic formation using a finite-difference model. We observe
Tsili Wang, Xiaoming Tang
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LWD Imaging Technologies and Applications

Fifth EAGE Borehole Geology Workshop, 2023
A. Taher, M. Fouda
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Complex Resistivity Responses Explained Using LWD Laterolog Curves and Images, LWD Propagation Resistivity and Wireline Dielectric Measurements

International Petroleum Technology Conference, 2019
Abstract During field testing of a logging-while-drilling (LWD) laterolog resistivity and imaging tool, formation resistivity differences were observed between the new laterolog and standard propagation resistivity. This paper compares the resistivity measurement acquired in the same borehole using different tools in both sand and shale ...
Lijun Guan, Xiannan Wang, Dong Xiao, Yen Han Shim, David Maggs, Carlos Maeso, Fabienne Legendre, Richard Leech, Chang Wei Qu   +8 more
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Logging-While-Drilling (LWD) Results in Indonesia

Offshore Technology Conference, 1992
ABSTRACT The engineering of well log sensors into drill collars enables the recording of Formation Resistivity, Gamma Ray, Neutron Porosity, Bulk Density and Photoelectric Factor (Pe). Data are recorded Downhole and selected data are transmitted to the surface in real time by way of mud pulse telemetry.
Phil Nordy, K. Henry
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LWD for Imaging, Wellbore Placement, and Formation Evaluation

Journal of Petroleum Technology, 2006
This article, written by Technology Editor Dennis Denney, contains highlights of paper OTC 17646, "LWD for Imaging, Wellbore Placement, and Formation Evaluation," by J.C. Rasmus, SPE, C. Esmersoy, SPE, J. Seydoux, and A. Hawthorn, Schlumberger, prepared for the 2005 Offshore Technology Conference, Houston, 2-5 May. Logging-while-drilling
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Formation Evaluation Using LWD NMR, LWD Electrical Imaging and Triple Combo Data - A Case Study from India

SPE Conference at Oman Petroleum & Energy Show
Abstract Logging While Drilling (LWD) Nuclear Magnetic Resonance (NMR), LWD Electrical Imaging along with Conventional Triple Combo LWD services were deployed in Mumbai Offshore field in India. LWD NMR data gives a rock independent porosity measurement which seem to verify the other measurements which in turn increases the data ...
Bagga Pawandeep Singh, Vardhan Harsh
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Shear Acquisition by LWD Quadrupole

12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15–18 August 2011, 2011
Carlos Francisco Beneduzi, Jorge Alberto Fett Medaglia   +1 more
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