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Research Paper

Parametric Study on the Determinants Affecting Paraffin Deposition in Producing Oil Field Facilities

생산유전 시설에서의 파라핀 침전 영향요인 분석연구

Jaeyoon Lee1
,
Daeyun Kim1
,
Howon Jung1
,
Jaejin Choi1
,
Ki-hun Eom2
,
Hyuk-sang Jung3
,
Wonbeom Kim1*
이 재윤1
,
김 대윤1
,
정 호원1
,
최 재진1
,
엄 기훈2
,
정 혁상3
,
김 원범1*
1㈜골든엔지니어링 기업부설연구소
2㈜이원이엔지
3동양대학교 철도대학 철도건설안전공학과
* Corresponding Author
29 February 2020. pp. 68-76
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Abstract

In this study, possible relationships between various facility-based factors and paraffin deposition in oil fields are suggested. Paraffin deposition commonly occurs during production and is determined by the environmental and operating conditions. The relevance of changes in annual temperature with burial depth of pipeline was examined and a parametric study was performed with the physical effects of flow patterns generated by artificial lift being evaluated utilizing Computational Fluid Dynamics(CFD) simulation. Paraffin was difficult to deposit on the surface of the rod, owing to the swirling flow generated around the rod in the Progressing Cavity Pump(PCP) system. In addition, a decrease in paraffin deposition was seen on the tubing surface, with the viscous sub-layer thickness determined by the wall shear stress depending upon the inlet velocity. When estimating paraffin deposition in an oil field, it is expected that more accurate evaluations will be possible if the suggested factors are taken into consideration.

Keywords
Oil field facility
Paraffin
Operation conditions
Soil temperature
Computational Fluid Dynamics(CFD)

본 연구는 생산유전에서 다양한 시설 요인과 파라핀 침전 간의 상관성을 제시하였다. 파라핀 침전은 생산 중 자주 발생하며, 이는 환경 및 운영조건에 따라 결정된다. 유동관 매설 깊이에 따른 연간 토양온도 변화 추이와의 상관성을 검토하였다. 그리고, 전산유체역학을 통해 인공채유 설비에서 발생한 유동 패턴의 물리적인 영향에 대해 요인 평가를 수행하였다. PCP(Progressing Cavity Pump) 시스템에서 rod 주변은 스월(swirl) 유동이 발생하여 rod 표면에는 파라핀이 침전이 잘되지 않는다. 또한, 내부 유속이 상승하면 벽면 전단응력의 증가로 점성하위층 두께가 감소하여 튜빙 표면에 파라핀 침전량이 감소하는 것으로 나타났다. 생산유전 시설의 파라핀 침전 상황 판단 시, 해당 요인들을 추가 고려한다면 더욱 정밀한 평가가 가능할 것으로 기대된다.

키워드
유전 시설
파라핀
운영조건
토양온도
전산유체역학
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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 : 57
  • No :1
  • Pages :68-76
  • Received Date : 2019-11-27
  • Revised Date : 2020-01-17
  • Accepted Date : 2020-02-21
  • DOI :https://doi.org/10.32390/ksmer.2020.57.1.068
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