Results 11 to 20 of about 464 (176)
Monopole Acoustic Logging While Drilling Acoustic Insulator Based on Labyrinthine Grooved Structure
Cejing jishuIn acoustic logging while drilling (ALWD), the presence of a thick-walled drill collar inspires significant amplitude drill collar waves, which will interfere with the measurement and acquisition of formation information.
DOU Yifan, ZHANG Chao, GUAN Wei
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Acoustic Emission and Echo Signal Compensation Techniques Applied to an Ultrasonic Logging-While-Drilling Caliper [PDF]
Sensors, 2017 A logging-while-drilling (LWD) caliper is a tool used for the real-time measurement of a borehole diameter in oil drilling engineering. This study introduces the mechanical structure and working principle of a new LWD caliper based on ultrasonic distance
Yongchao Yao +3 more
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Higher order modes in acoustic logging while drilling [PDF]
SEG Technical Program Expanded Abstracts 2005, 2005 Summary In multipole acoustic logging while drilling (LWD), the fundamental modes dominate recorded waveforms. Higher order modes may also appear and complicate the processing of LWD data. In dipole LWD measurements, the dipole tool mode is often not well separated from the flexural mode. This makes the shear wave measurement more difficult.
Shihong Chi +3 more
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Acoustic radiation and reflection of a logging-while-drilling dipole source [PDF]
Geophysical Journal International, 2019 SUMMARY With the comparison to the resistivity ultra-deep measurement, the single-well reflection survey in acoustic logging-while-drilling (ALWD) measurement lags far behind, especially ALWD dipole measurement has long been thought to be little added value.
Zhoutuo Wei, Xiaoming Tang, Jingji Cao
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Acoustic source characterization for a logging while drilling tool: Theoretical and experimental modeling [PDF]
The Journal of the Acoustical Society of America, 2018 The development of acoustic source technology has been an important task for acoustic logging while drilling (LWD) and various source designs have been implemented. Using a multipole wave expansion theory, this study demonstrates that a LWD acoustic source can be represented as a combination of monopole, dipole, and quadrupole constituents and ...
Song, Xu +6 more
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Coal body structure identification and development effect evaluation based on logging response
Meikuang Anquan, 2021 According to the logging response characteristics of different coal structures, this paper quantitatively identified and described the coal structure in the research area, verified the results by drilling and coring.
LI Quanzhong, ZHAO Lingyun, HU Haiyang
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The research of LWD acoustic isolator based on SAW spatial separation [PDF]
MATEC Web of Conferences, 2019 Acoustic logging while drilling (LWD) can extract P-wave and S-wave information from the formation. However, the transmission of the collar wave propagated directly from the emitter to the receiver may interfere with the P-wave and S-wave and affect the ...
Yang Peinian, Chen Dehua, Xiuming Wang
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Frontiers in Earth Science, 2022 Based on the comprehensive analysis of wellbore characteristics in a deep shale gas field, the in-situ stress state of the shale reservoir was assessed in this study for the Longmaxi formation in the Dingshan area, Southwestern China.
Qinjie Liu +9 more
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The optimal design of receiving circuit in acoustic logging while drilling tool [PDF]
Advances in Computer Science Research, 2015 This paper begins with the problems encountered in logging while drilling practice, proposing the necessity and requirement of receiving circuit with rigorous design. Considering the fact that the amplitude of noise signal with low frequency is far greater than that of formation wave, this paper provides a design of 11-order high pass analog active ...
Hongbin He, Penglai Xin, Zheng Zhang
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Multipole Seismoelectric Logging while Drilling (LWD) for Acoustic Velocity Measurements [PDF]
Proceedings, 2012 Massachusetts Institute of Technology. Earth Resources Laboratory (Founding Member Consortium)
Z. Zhu, J. Wang, N. Toksz
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