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2018 Vol.55, Issue 4 Preview Page

General Remarks

Hydromechanical dynamics of hydraulic and natural fractures

수압파쇄 및 자연 균열의 수리역학적 동역학

Joong-Ho Synn1*
,
Chan Park1
신 중호1*
,
박 찬1
1DCenter for Deep Subsurface Research, Korea Institute of Geoscience and Mineral Resources
* Corresponding Author
31 August 2018. pp. 340-353
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Abstract

This study analyzed the hydromechanical behaviors of hydraulic and natural fractures caused by fluid injection, such as fracture closing-reopening and the related pressure parameters, stress mechanism changes, slippage-dilation criterion of natural fracture, and complex fracture intersections. When hydraulic and natural fractures intersect, the conditions for crossing, slippage, and dilation depend on intersection angles between fracture and stress direction, differential stress, and mechanical properties such as cohesion and friction coefficient of the fractures. Micro-mechanical and quantitative assessment technologies should be further developed for the analyses of fluid-fracture dynamics and the induced seismicity-like phenomenon.

Keywords
hydraulic fracture
hydromechanical behavior
slippage-dilation criterion
complex fracture intersection

지하 암반 내 유체 주입에 의한 수압파쇄 균열과 자연 균열의 수리역학적 거동과 관련하여 균열 개폐와 압력 변수 관계, 응력 메카니즘 변화, 자연 균열의 미끄러짐-팽창 기준, 복합 균열 교차 전파 등의 관계를 분석하였다. 자연 균열면의 열림 상태에 따라 균열 거동과 관련한 압력 변수 및 응력해석해 적용의 유효성에 차이가 있었다. 수압파쇄 균열과 자연 균열의 교차시에 수압파쇄 균열의 자연 균열 관통, 자연 균열의 미끄러짐 또는 팽창 열림 등의 기준은 두 균열의 교차각, 주응력 방향과의 교차각, 주응력의 차, 균열면의 역학적 특성인 점착력과 마찰계수 등에 의해 좌우된다. 이러한 유체-불연속면 동역학적 거동 및 때로 수반되는 지진동 같은 현상의 관계 규명에는 미시역학적이고 정량적인 연구와 평가기법 개발이 있어야 한다.

키워드
수압파쇄 균열
수리역학적 거동
미끄러짐-팽창 기준
복합 균열 교차
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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 : 55
  • No :4
  • Pages :340-353
  • Received Date : 2018-08-16
  • Revised Date : 2018-08-24
  • Accepted Date : 2018-08-29
  • DOI :https://doi.org/10.32390/ksmer.2018.55.4.340
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