Development of Real-Time Borehole Deviation and Magnetic Gradient Logging System and its Preliminary Field Test

Sung-Ho Cho; Hyun-Key Jung; Hyosun Lee; Yesol Kim

doi:10.32390/ksmer.2019.56.1.023

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2019 Vol.56, Issue 1 Preview Page Next Page

Research Paper

Development of Real-Time Borehole Deviation and Magnetic Gradient Logging System and its Preliminary Field Test 실시간 시추공 차분자기/편차 검층 시스템 개발 및 기초 현장시험

28 February 2019. pp. 23-32

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Abstract

A smart device-based borehole deviation and magnetic gradient logging system is proposed. The whole system consists of a sonde, 500-m long electric winch module, rotary encoder module, the main control module, and a smart device. The sonde is made up of an attitude-and-heading-references-system based on digital output miniature high-precision microelectromechanical systems, a magnetic gradiometer sensor composed of two separated three-axis fluxgate sensors spaced 500 mm apart with analog voltage output, and a 24-bit analog-to-digital high-resolution acquisition/control module. The three component modules are situated in 1.5-m length 48-mm diameter titanium housing. To evaluate the performance of the system, preliminary field test was performed at 440-m borehole located in Ulsan samjeongri. The falling speed of sonde was 0.3 m/s and 2-Hz continuous measurement and monitoring were carried out.

Keywords

Attitude and heading reference system

borehole deviation logging

magnetic gradient

MEMS

최신 전자, 정보통신 기술을 활용하여 실시간 차분자기/편차 검층 시스템을 개발하였다. 전체 시스템은 존데, 500 m 전동윈치 모듈, 로터리 엔코더 모듈, 주 제어모듈과 스마트 디바이스로 구성된다. 존데는 길이 1.5m 외경 48mm 티타늄 하우징을 가지며 내부에 디지털 출력 초소형 고정밀 MEMS 기반 AHRS, 두 개의 3축 플럭스케이트 센서가 500mm 이격되어 있는 아날로그 고정밀 차분 자기센서, 24 비트 analog-to-digital 고정밀 계측/제어 모듈이 포함된다. 개발된 시스템의 기초현장시험을 위해 울산 삼정리 반정 저수지 옆 440m 시추공에서 0.3m/s의 속도로 존데를 하강시키면서 2Hz 연속측정을 수행하였다.

키워드

자세방위기준장치

시추공 편차검층

자기편차

멤스

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Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 56
No :1
Pages :23-32
Received Date : 2019-01-29
Revised Date : 2019-02-18
Accepted Date : 2019-02-22
DOI :https://doi.org/10.32390/ksmer.2019.56.1.023

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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