Results 201 to 210 of about 1,698 (252)
Integrating NMR and machine learning for pore-type driven rock classification in the heterogeneous Asmari carbonate reservoirs. [PDF]
Sci RepVeysi M +5 more
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Transducer for sonic logging-while-drilling
The Journal of the Acoustical Society of America, 1998An acoustic wave transducer useful in sonic logging while drilling a borehole includes an array of transducer elements mounted circumferentially around a drill collar. The elements are bonded in an elastomer ring that is received in an external groove in the collar and are protected by a shield having windows. The elements are electrically connected in
ARON JEFFREY B +3 more
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Acoustic Logging-While-Drilling
2020Acoustic logging-while-drilling (ALWD) is an advanced technology developed to determine the formation properties in real-time while drilling. Its advantages include obtaining formation properties while conserving drill-rig time, true formation information without invasion, acquisition of information for drilling safety such as over-pressured formations,
Hua Wang +2 more
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Multipole acoustic logging‐while‐drilling
SEG Technical Program Expanded Abstracts 2002, 2002The problem of multipole acoustic Logging-WhileDrilling (LWD) is analyzed. By formulating a multipole acoustic ring source at the rim of the drill collar, we model the characteristics of monopole, dipole, and quadrupole waves in the LWD environment.
X. M. Tang, T. Wang, D. Patterson
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MULTIPOLE ACOUSTIC LOGGING-WHILE-DRILLING
ГЕОФИЗИКА, 2022В статье представлены итоговые результаты НИОКР по созданию мультипольного акустического прибора для каротажа в процессе бурения, дан обзор зарубежных прототипов, указан комплекс решенных научнотехнических проблем. Приведены достигнутые характеристики прибора, примеры обработки полевых скважин и анализа данных каротажа.
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Novel Scintillators for Logging while Drilling
Proceedings, 2016Summary The quality and characteristics of scintillating materials has improved in recent decades but mineral exploration gamma-logging tools have failed to capitalize upon these newer developments. Most tools still incorporate NaI crystals, which have been in use since the 1960s.
M. Carson, A. Kepic
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Logging-While-Drilling in Unconventional Shales
SPE Annual Technical Conference and Exhibition, 2010Abstract Unconventional shale environments have traditionally been evaluated with wireline logging tools. Recently, it has become more common to evaluate these wells with logging-while-drilling tools because of challenges such as wellbore stability problems that make it risky to leave the hole uncased long enough to run wireline.
Jennifer Market +7 more
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Logging-While-Drilling (LWD) Results in Indonesia
Offshore Technology Conference, 1992ABSTRACT 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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Analysis of Signal Transmission for Use of Logging While Drilling
IEEE Geoscience and Remote Sensing Letters, 2013Effective downhole-to-surface transmission of the logging signals is one of the critical techniques for logging while drilling (LWD). This letter aims to evaluate an advanced scheme of signal transmission for the LWD proposed by Novatek, with an emphasis on the electromagnetic (EM) coupling between two adjacent pipes and the impedance matching between ...
Shi-Wei Qu 0001 +4 more
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