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Design of a Multi-Node Data Acquisition System for Logging-While-Drilling Acoustic Logging Instruments Based on FPGA.

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Summary

This study introduces a new Field-Programmable Gate Array (FPGA)-based data acquisition system for logging-while-drilling (LWD) acoustic logging. The system enhances data accuracy and real-time collection for improved subsurface formation assessment in oil and gas exploration.

Keywords:
AD7380FPGAacquisition systemlogging-while-drilling acoustic logging instrument

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Area of Science:

  • Geophysics
  • Petroleum Engineering
  • Electrical Engineering

Background:

  • Logging-while-drilling (LWD) acoustic logging is crucial for real-time subsurface formation assessment in unconventional oil and gas exploration.
  • Current LWD acoustic logging acquisition systems face limitations in data collection capabilities and precision.
  • The accuracy and timeliness of LWD acoustic logging data depend heavily on the acquisition system's performance.

Purpose of the Study:

  • To address the limitations of existing LWD acoustic logging acquisition systems.
  • To introduce a novel FPGA-based multi-node data acquisition system for LWD acoustic logging.
  • To enhance sampling density and data accuracy for more comprehensive formation information collection.

Main Methods:

  • Developed a multi-node data acquisition system using Field-Programmable Gate Arrays (FPGAs).
  • The system comprises a main control board and multiple acquisition boards connected via an RS485 bus.
  • FPGA firmware allows adjustable control over sampling rate, depth, and operational modes for real-time signal acquisition and storage.

Main Results:

  • The FPGA-based system demonstrated increased sampling density and improved data accuracy.
  • Experimental results confirmed efficient real-time capture and uploading of acoustic waveform signals.
  • The system achieved high-speed, real-time acquisition and processing of acoustic signals.

Conclusions:

  • The developed FPGA-based multi-node system offers enhanced reliability and scalability for LWD acoustic logging.
  • The system provides robust technical support for the continued application of LWD acoustic logging instruments.
  • This advancement improves the accuracy and timeliness of subsurface formation assessments in oil and gas exploration.