방향성 시추를 위한 시추공 위치오차와 보정
Wellbore Positional Uncertainty and Correction of Directional Drilling
4
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
시추공 위치측정은 지표좌표에서 지하좌표로 연결된 시추궤도에 맞춰 굴착하면서 시추공 위치를 파악하기위해 위치자료를 취득하는 일련의 과정이다. 측정된 시추공 위치정보인 측정깊이, 경사각 그리고 방위각을 바탕으로기준점으로부터 시추공 위치를 계산한다. 그러나 시추공 위치측정 과정에서 측정위치의 참값과 측정값 사이의 오차가 존재하며 대표적인 오차는 시추스트링과 송신케이블 길이변화, 위치측정기 기울어짐, 자기장 모델 오차와 시추스트링 자기간섭이다. 따라서 시추공 위치오차의 이해와 검토는 목적한 저류층의 굴착, 인접공과의 충돌방지 및 구조정시추 시 중요하다. 이 논문에서는 시추공 위치오차에 대해서 알아보고, 단일 및 다중 시추공에서의 오차 보정의 적용성을 분석하였다
Abstract
Wellbore surveying is the interactive process used to obtain wellbore positions according to well trajectory which connects surface coordinates to subsurface coordinates. The measured values such as the measured depth, inclination, and azimuth are used to calculate well paths with a specified reference system. However, errors exist between the true wellbore position and surveyed wellbore position, including depth measurement errors of the drillstring and wireline, misalignment errors, geomagnetic model, and magnetic interference errors. Therefore understanding and evaluating wellbore positional errors is critical for hitting reservoir targets, collision avoidance, and drilling relief wells. In this paper, wellbore positional uncertainty has been reviewed and the application of survey corrections in single and multiple wells has been investigated.
참고문헌 (25)
- Bourgoyne, Jr. A. T., "Applied Drilling Engineering", pp.351~453 (1986), SPE
- "British Geological Survey" (2020)[URL]
- Buchanan, A., "Geomagnetic referencing – the real-time compass for directional drillers", Oilfield Review, 25(3), pp.32~47 (2013)
- 조민우, "방향성 시추를 위한 RSS 기술특성 및 적용사례 분석", 한국자원공학회지, 52(1), pp.91~102 (2015), 한국자원공학회
- Choi, J. K., "Offshore Drilling Engineering", pp.284~285 (2011), CIR
- Grindord, S. J., "Calculation of NMDC length required for various latitudes developed from field measurements of drill string magnetisation", paper SPE 11382 presented at IADC, 1983, 20~23
- "Industry Steering Committee on Wellbore Survey Accuracy" (2019)[URL]
- Jamieson, A., "Introduction to Wellbore Positioing, V09.10.17", University of the Highlands & Islands, 17~ (2017)
- Kang, J., "A numerical analysis on deviation control of directional hole", Journal of The Korean Society of Mineral and Energy Resources Engineers, 27(4), pp.290~297 (1990)
- 김빛나래, "방향제어 시추를 위한 실시간 시추중 측정 및 검층 기술 소개: Schlumberger 장비를 중심으로", 한국자원공학회지, 55(1), pp.49~66 (2018), 한국자원공학회
- 김현태, "석유 ․ 가스전 방향성 시추의 방향제어 기술개발 동향", 한국자원공학회지, 51(6), pp.855~865 (2014), 한국자원공학회
- 권순일, "고갈저류층 시추공 안정성 분석과 시추전략", 한국자원공학회지, 56(3), pp.280~291 (2019), 한국자원공학회
- Lake, L. W., "Petroleum engineering handbook: volume Ⅱ drilling engineering", pp.265~286 (2006), SPE
- Lim, J., "Directional drilling for the application of restricted areas and optimal producing of Oil & Gas", KIGAM Bulletin, 13(1), pp.14~31 (2009)
- Mahmound F., A., "Advanced trajectory computational model improves calculated borehole positioning, tortuosity and rugosity", paper SPE 178796 presented at IADC, 2016, 1~3
- Nyrnes, E., "Minimum requirements for multi-station analysis of MWD magnetic directional surveys", paper SPE 125677 presented at SPE Middle East Drilling Technology Conference and Exhibition, pp.26~28 (2009)
- Poedjono, B., "Anticollision risk management standard for well placement", paper SPE 121040 presented SPE Americas E&P Environmental and Safety Conference, pp.23~25 (2009)
- Sawaryn, S. J., "Well collision avoidance management and principles", paper SPE 184730 presented at SPE, 2017, 14~16
- Sawaryn, S. J., "Well collision avoidance -separation rule", paper SPE 187073 presented at SPE Annual Technical Conference and Exhibition, pp.9~11 (2017)
- "Schlumberger" (2019)[URL]
- Stockhausen, E.J., "Continuous direction and inclination measurements lead to an improvement in wellbore positioning", paper SPE 79917 presented at SPE, 2003, 19~21
- Tochikawa, T., "Acoustic telemetry: the new MWD system", paper SPE 36433 presented at SPE Annual Technical Conference and Exhibition, pp.6~9 (1996)
- Walstrom, J. E., "An Analysis of uncertainty in directional surveying", Journal of Petroleum Technology, 21(4), pp.515~523 (1969)
- Williamson, H. S., "Accuracy prediction for directional MWD", paper SPE 56702 presented at SPE Annual Technical Conference and Exhibition, pp.3~6 (1999)
- Wolff, C.J.M., "Borehole position uncertainty – analysis of measuring methods and derivation of systematic error model", paper SPE 9223 presented at SPE Annual Technical Conference and Exhibition, pp.21~24 (1981)