감압율에 따른 코어스케일 실험시스템 내 가스하이드레이트 해리거동 전산분석 연구
Numerical Analysis of Depressurization Rate Effects on the Gas Hydrate Dissociation Behavior in Core Scale Experimental System
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초록
가스하이드레이트 개발 시 감압법 적용에 따른 생산효과 분석을 위해 생산모사 실험과 전산수치 해석을 연계한 연구가 필요하다. 이 연구에서는 생산경향과 가스하이드레이트 해리거동에 대한 감압율의 영향을 파악하고자코어스케일 실험시스템의 조건을 반영한 전산수치 모델을 구축하였다. 실험결과와의 비교로 검증한 전산수치 모델을 활용하여 감압율의 영향을 분석하였다. 그 결과 감압율이 클수록 가스하이드레이트 해리 속도가 빨라져 생산 시작및 해리 완료 시점이 앞당겨졌다. 또한 특정 감압율 이상에서는 압력 전파가 지연되었다. 감압율 및 가스하이드레이트포화율이 클수록 생산지점과 실험시스템 경계에서의 압력차이가 증가함을 파악하였다. 이 연구 결과는 감압법을적용한 현장 시험생산 계획 수립에 기초자료로 활용 가능할 것이다.
Abstract
A numerical analysis integrated with the production experiment is required to analyze the effect of depressurization on the production of gas hydrate(GH). In this study, a numerical simulation model considering condition of a core scale experimental system was constructed to understand the depressurization rate effect on the production trend and GH dissociation behavior. The model was validated by comparing with the experimental results and used to analyze depressurization rate. The faster GH dissociation rate as the depressurization rate is increased, which results in the earlier beginning of the production and completion of the dissociation. The pressure propagation was delayed above the specific depressurization rate. The pressure difference between the production point and the experimental system boundary was greater as the depressurization rate and GH saturation is higher. This results can be used as the basic data for establishing the field production test plan using depressurization.
참고문헌 (22)
- Boswell, R., "Current perspectives on gas hydrate resources", Energy and Environmental Science, 4(4), pp.1206~1215 (2011)
- Collett, T. S., "Energy resource potential of natural gas hydrate", AAPG Bulletin, 86(11), pp.1971~1992 (2002)
- Feng, J. C., "Large scale experimental evaluation to methane hydrate dissociation below quadruple point by depressurization assisted with heat stimulation", Energy Procedia, 142, pp.4117~4123 (2017)
- 길성민, "가스하이드레이트 생산모사 실험시스템 내 감압법 적용에 따른 해리거동 전산분석 연구", 한국자원공학회지, 54(3), pp.233~241 (2017), 한국자원공학회
- Gil, S. M., "Numerical analysis of dissociation behavior at critical gas hydrate saturation using depressurization method", J. Geophysical Research : Solid Earth, 124(2), pp.1222~1235 (2019)
- 허대기, "가스하이드레이트 기술개발 현황", 한국자원공학회지, 42(3), pp.206~213 (2005), 한국자원공학회
- 허대기, "가스하이드레이트(GH) 연구개발 현황", 한국자원공학회지, 54(2), pp.201~214 (2017), 한국자원공학회
- Janicki, G., "Simulation of subsea gas hydrate exploitation", Energy Procedia, 59, pp.82~89 (2014)
- Lee, J., "Numerical simulation of dissociation behavior in gas hydrate experimental production system using depressurization method", The 9th International Conference on Gas Hydrate, pp.1~ (2017)
- Lee, S. M., "Numerical Analysis of Dissociation Behavior in Mesoscale Gas Hydrate Production Experimental System", 석사, pp.2016
- Lee, S. R., "Recent developments of gas hydrate program in korea: ulleung basin gas hydrate drilling expedition 2", Proc. of the 7th International Conference on Gas Hydrate, pp.7~ (2011)
- Li, G., "Gas production from methane hydrate in cubic hydrate simulator using depressurization method by experimental and numerical studies", Energy Procedia, 61, pp.803~807 (2014)
- TOUGH +HYDRATE v1.0 User’s Manual:A code for the Simulation of System Behavior in Hydrate-Bearing Geological Media, "Moridis, G. J.", Lawrence Berkely National Laboratory, 279~, pp.LBNL-149E (2008)
- Mualem, Y., "A new model for predicting the hydraulic conductivity of unsaturated porous media", Water Resources Research, 12(3), pp.513~522 (1976)
- 박근필, "가스하이드레이트 개발", 한국자원공학회지, 45(5), pp.590~600 (2008), 한국자원공학회
- Ruan, X., "Numerical simulation of methane production from hydrate induced by different depressurizing approaches", Energies, 5(2), pp.21~ (2012)
- Stone, H. L., "Probability model for estimating three-phase relative permeability", J. Petroleum Technology, 22(2), pp.214~218 (1970)
- 석화수, "X-ray CT를 결합한 가스하이드레이트 생산모사 실험시스템 개발", 한국자원공학회지, 55(3), pp.226~237 (2018), 한국자원공학회
- Suk, H., "Experimental study of reservoir properties based on packing-methods in unconsolidated sediment", 2017 Fall Joint Conference of KSMER, KSRM, and KSEG, KSMER, pp.200~ (2017)
- USGS, "Gas Hydrate in Nature, Fact Sheet 2017-3080", 4~ (2018)
- van Genuchten, M. Th., "A closed-form equation for predicting the hydraulic conductivity of unsaturated soils", Soil Science Society of America Journal, 44(5), pp.892~898 (1980)
- Wang, D., "Impact factors of natural gas hydrate dissociation by depressurization: a review", Advanced Materials Research, 868, pp.564~567 (2014)