Results 221 to 230 of about 1,682 (251)
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Logging while drilling shear sonic logging in very large boreholes
The Journal of the Acoustical Society of America, 2019As LWD sonic tools have become more advanced, they have become more routine in use and are now commonly used in multiple hole sections, with the results having applications across a wide range of problems in well construction. The acquisition of quadrupole shear measurements in large boreholes and slow formations is highly challenging however, due to ...
Matthew Blyth +4 more
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Integration of seismic data and while-drilling logs to reduce drilling uncertainty
12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15–18 August 2011, 2011Seismic is used as a primary input in planning and execution of drilling projects. However, it is not always used to its full potential. An earth model consisting of structural information with geological targets, faults, and with relevant formation properties such as pore pressure and fracture gradient guide drilling decisions to help place the well ...
C. Esmersoy +7 more
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Signal Processing in Logging While Drilling
2019Logging while drilling (LWD) technology can be roughly divided into three generations. Correlation with construction and formation evaluation; logging while drilling ensures that the logging data required to determine capacity and economy and reduce drilling risks can be collected.
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Study on a Data Acquisition System for Logging while Drilling
Applied Mechanics and Materials, 2012This electronic Logging while drilling (LWD) is a new sort of well drilling technology developed in recent years. As to the traditional cable borehole survey, the LWD method has many advantages because of its higher accuracy, higher geologic strata resolution capacity, much less time and cost.
Sheng Hu Liu, Ya Min Xing
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Nuclear Tools For Oilfield Logging-While-Drilling Applications
AIP Conference Proceedings, 2011Schlumberger is an international oilfield service company with nearly 80,000 employees of 140 nationalities, operating globally in 80 countries. As a market leader in oilfield services, Schlumberger has developed a suite of technologies to assess the downhole environment, including, among others, electromagnetic, seismic, chemical, and nuclear ...
Jani Reijonen +2 more
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Electromagnetic Propagation Logging While Drilling: Theory and Experiment
SPE Formation Evaluation, 1990Summary The compensated dual resistivity (CDRSM) tool is an electromagnetic propagation tool for measurement while drilling. The CDR tool provides two resistivity measurements with several novel features that are verified with theoretical modeling, test-tank experiments, and log examples.
Brian Clark +6 more
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Seismic Logging While Drilling Evolution
Sixth EAGE Borehole Geophysics Workshop, 2021N. Kelsall, L. Euranie
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Geometrical optimization of an acoustic logging-while-drilling isolator
International Meeting for Applied Geoscience & EnergyIn this study axial symmetric 2.5D finite difference (FD) modeling is used to optimize the geometry of an acoustic isolator in a 6-3/4” acoustic logging while drilling (LWD) tool. Two distinct designs were evaluated: one featuring outer grooves and another one with grooves located on the inner surface of the tool conduit.
Wolfgang Weinzierl +3 more
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Acoustic fields for monopole logging while drilling with an eccentric collar
Geophysics, 2021Yunjia Ji, Xiao He, Hao Chen
exaly