Research and experimental testing of a new kind electrokinetic logging tool

Li, Fengbo; Ji, Xiaodong; Qiao, Wenxiao; Lü, Jian; Men, Bai-Rong

doi:10.1007/s11770-014-0466-9

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…A piezoelectric monopole source generally works in the range of 10–20 kHz and generates a wavefield without directivity in a homogeneous medium. It has high power, and its sound-pressure level (SPL) 1 m from the source in water can reach ~210 dB [ 10 ]. Based on the source and a monopole receiver, early tools can only determine the distance from a reflector to a borehole and cannot determine the specific azimuth [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

A Plasma Transmitting Source for Borehole Acoustic Reflection Imaging

Hao

Zhou

Shang

et al. 2022

Sensors

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The detection depth of current borehole acoustic reflection imaging is only tens of meters without high resolution. This considerably limits its wide application in the identification and fine description of unconventional reservoirs and in the optimization of drilling trajectories. Increasing the directional energy from the transmitter to a geological structure is an excellent way to solve this issue. In this study, a plasma source with a parabolic reflector was introduced during borehole acoustic reflection imaging. First, an experimental system was built for testing the plasma source. Next, the acoustic-electrical characteristics and directional radiation of the source were studied using experiments and a numerical simulation. Finally, the advantages, disadvantages, and feasibility of the plasma-transmitting source were analyzed; some suggestions for further work on the source and its logging application were proposed. The experimental and simulation results show that the use of a plasma source with a parabolic reflector can increase the detection depth of borehole acoustic reflection imaging to hundreds of meters with high resolution. This is crucial in imaging the geological structures near boreholes and enhancing oil–gas exploration and development.

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Section: Introductionmentioning

confidence: 99%

A Plasma Transmitting Source for Borehole Acoustic Reflection Imaging

Hao

Zhou

Shang

et al. 2022

Sensors

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“…The instrument was tested in water wells, and the water resistivity and permeability of formation were obtained. The acoustic logging laboratory of the China University of Petroleum developed a seismoelectric logging tool which was compatible with the Eilog imaging system of the China Petroleum Logging Company [22]. The whole detector was connected to the Eilog system during the field testing, and ideal results were obtained [23].…”

Section: Introductionmentioning

confidence: 99%

Design of a New Seismoelectric Logging Instrument

Zhang

Lü

et al. 2021

Sensors

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To increase the accuracy of reservoir evaluation, a new type of seismoelectric logging instrument was designed. The designed tool comprises the invented sonde-structured array complex. The tool includes several modules, including a signal excitation module, data acquisition module, phased array transmitting module, impedance matching module and a main system control circuit, which are interconnected through high-speed tool bus to form a distributed architecture. UC/OS-II was used for the real-time system control. After constructing the experimental measurement system prototype of the seismoelectric logging detector, its performance was verified in the laboratory. The obtained results showed that the consistency between the multi-channel received waveform amplitude and benchmark spectrum was more than 97%. The binary phased linear array transmitting module of the instrument can realize 0° to 20° deflection and directional radiation. In the end, a field test was conducted to verify the tool’s performance in downhole conditions. The results of this test proved the effectiveness of the developed seismoelectric logging tool.

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