SUN Xiaofang, LIU Feng, ZHANG Conghui, et al. Transmission frequency optimization of borehole imaging for dipole acoustic remote detection of slow formations [J]. Petroleum Drilling Techniques,2023, 51(1):98-105. DOI: 10.11911/syztjs.2023017
Citation: SUN Xiaofang, LIU Feng, ZHANG Conghui, et al. Transmission frequency optimization of borehole imaging for dipole acoustic remote detection of slow formations [J]. Petroleum Drilling Techniques,2023, 51(1):98-105. DOI: 10.11911/syztjs.2023017

Emission Frequency Optimization of Borehole Imaging for Dipole Acoustic Remote Detection of Slow Formations

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  • Received Date: September 21, 2022
  • Revised Date: December 04, 2022
  • Available Online: December 26, 2022
  • In order to improve the quality of adjacent borehole imaging of cluster wells by dipole acoustic remote detection of slow formations, the optimal emission frequency of the dipole sonic source was determined. According to the theory of dipole radiation sound field in slow formations, the energy flow of radiation wave and the radiation directivity of dipole P-wave were calculated, and their change law with the frequency variation were analyzed. In combination with the tests in experimental wells and field application, the optimal excitation frequency of the dipole sonic source suitable for adjacent well imaging in shallow and slow formations was determined as 2.4 kHz. The results showed that with good logging data quality, the remote detection imaging map of adjacent wells obtained and processed by the excitation frequency was clear and reliable, and identifying the reflectors in the map could determine the distance and azimuth of adjacent wells to logging wells. The results can guide the anti-collision of adjacent wells in shallow cluster wells and provide a new technical method for the anti-collision of adjacent wells in cluster wells within development phase.

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