Abstract
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.
Highlights
Seismoelectric logging is an emerging geophysical logging method
China University of Petroleum a new and generation of seismoelectric logging detectors, which are of Petroleum developed a new generation of seismoelectric detectors, which are currently undergoing laboratory and field tests
The measurement system is mainly composed of seismoelectric logging instrument, posiFigure9.9.Directivity
Summary
Seismoelectric logging is an emerging geophysical logging method. The seismoelectric coupling effects between an elastic wave and an electromagnetic field have potential applications in oil-gas exploration [1]. Singer et al used the finite element method to simulate the acoustic logging wave field [7]. MIT scholars carried out relevant experiments on electrokinetic logging [11,12] They built a small well model in the laboratory, and observed two types of waves using a sound excitation source. Studied the waveform and velocity characteristics of setup was designed to evaluate rock permeability by measuring the streaming current [19]. EKL logging was tested in water and the of water resistivity and effect permeability of instrument formation were instrument based onwells, the principle the seismoelectric [21]. The. China University of Petroleum a new and generation of seismoelectric logging detectors, which are of Petroleum developed a new generation of seismoelectric detectors, which are currently undergoing laboratory and field tests [24,25,26].
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