Numerical Analysis of Dissociation and Flow Behavior
in Gas Hydrate Bearing Sediments for the Productivity Influence Factors
in the Ulleung Basin, East Sea of Korea

doi:10.12972/ksmer.2015.52.5.500

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2015 Vol.52, Issue 5 Preview Page Next Page

Research Paper

Numerical Analysis of Dissociation and Flow Behavior in Gas Hydrate Bearing Sediments for the Productivity Influence Factors in the Ulleung Basin, East Sea of Korea 동해 울릉분지 가스하이드레이트 퇴적층의생산 영향 인자 변화에 따른 해리유동 분석: 신효진·김지수·임종세·김세준
Hyo-Jin Shin, Ji-Su Kim, Jong-Se Lim and Se-Joon Kim

31 October 2015. pp. 500-510

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Abstract

It is assumed that huge amounts of gas hydrate(GH) are buried in the Ulleung basin, East Sea ofKorea. In order to develop the GH, production test should be carried out on the basis of the analysis reflectedfield conditions. In this study, numerical simulation model was composed based on the geological system at fieldproduction test site. Also, GH dissociation and flow behavior for productivity influence factors was analyzed toprepare history matching after production test. As a result, low-temperature distribution was extended in caseof the small value of bottom hole pressure, and gas production was increased because decompression phenomenonoccurs significantly in nearby production well. The smaller permeability anisotropy value, improved horizontalflow caused the increased gas production. Consequently, it is possible to use the preliminary analysis of GHfield production test through the results derived by assuming a variety of production scenarios and sedimentary property.

Keywords

Gas hydrate(GH)

Dissociation and flow behavior

Numerical simulation

Productivity influence factors

Field production test

동해 울릉분지에는 막대한 부존량으로 높은 잠재력을 지닌 가스하이드레이트가 부존되어 있으며, 이를개발하기 위해서는 현장조건을 반영한 분석을 토대로 시험생산이 이루어져야 한다. 이 연구에서는 현장 시험생산 후보지의 지질학적 구조를 바탕으로 전산 수치 모델을 구성하였으며, 향후 시험생산 수행 후 히스토리매칭작업을 대비하기 위해 생산 영향 인자에 대한 해리유동 전산 수치 분석을 수행하였다. 그 결과 공저압이 낮을수록 생산정 부근에서 감압현상이 크게 발생하여 저온 분포가 확대되고 가스 생산량이 증가하였으며, 유체투과도이방성의 경우 값이 작을수록 수평방향 유동이 향상되어 증가한 가스 생산량을 보였다. 따라서 다양한 생산시나리오와 퇴적층 물성을 가정하여 도출한 결과를 통해 가스하이드레이트 현장 시험생산 계획 수립 시 요구되는 예비 분석 자료로 이용 가능할 것이다.

키워드

가스하이드레이트

해리유동

전산 수치 분석

생산 영향 인자

현장 시험생산

References

Collett, T.S., 2002, “Energy resource potential of natural gas hydrates,” AAPG Bulletin, Vol. 86, No. 11, pp. 1971- 1992.
Huh, D.G., 2005, “Status of Gas Hydrate Research in Korea,” J. of the Korean Society for Geosystem Engineering, Vol. 42, No. 3, pp. 206-213.
Kim, D. and Lee, J., 2010, “Gas Hydrate R&D International Trends and Patent Analysis,” J. of the Korean Society for Geosystem Engineering, Vol. 47, No. 4, pp. 464-474.
Kim, H.M., 2015, “Numerical Analysis for Geomechanical Deformation of Sea Bed due to Gas Hydrate Dissociation,” J. of the Korean Society Mineral and Energy Resources Engineers, Vol. 52, No. 2, pp. 148-157.
Kim, J.S., Lee. R.S, Lim, J.S. and Kim, S.J., 2014, “Numerical Analysis on Flow Behavior of Gas Hydrate Bearing Sediments in the Ulleung Basin, East Sea of Korea,” J. of Energy Engineering, Vol. 23, No. 3, pp. 102-115.
Kvenvolden, K.A., 1998, “A primer on the geological occurrence of gas hydrate,” Geological Society Special Publication, Vol. 137, pp. 9-30.
Lee, D.G., Shin, H.J. and Lim, J.S., 2013, “3D Spatial Distribution Modeling for Petrophysical Property of Gas Hydrate-Bearing Sediment using Well Data in Ulleung Basin,” J. of Energy Engineering, Vol. 22, No. 2, pp. 156-168.
Lee, S.R., Kim, D.S., Ryu, B.J., Bahk, J.J., Yoo, D.G., Kim, G.Y., Lee, J.Y., Yi, J.S., Collett, T.S., Riedel, M. and Torres, M.E., 2011, “Recent Developments of Gas Hydrate Program in Korea: Ulleung Basin Gas Hydrate Drilling Expedition 2,” Proceedings of the 7th International Conference on Gas Hydrates, Scotland, United Kingdom, July 17-21.
Majumdat, U., Cook, A,. Ismail, S., Frye, M. and Shedd, W., 2014, “Gas Hydrate Assessment in the Northern Gulf of Mexico: Preliminary Results Reveal New Prospects,” Fire in the Ice, Vol. 14, No. 2, pp 1-3.
Moridis, G.J. and Reagan, M.T., 2007a, “Strategies for Gas Production from Oceanic Class3 Hydrate Accumulations,” OTC 18865 presented at the Offshore Technology Conference, Texas, USA, April 30-May 3.
Moridis, G.J. and Reagan, M.T., 2007b, “Gas Production From Class 2 Hydrate accumulations in the Permafrost,” Proceedings of the SPE Annual Technical Conference and Exhibition, California, USA, November 11-14.
Moridis, G.J., Kim, J.H., Reagan, M.T and Kim, S.J., 2014, “System Response During Short- and Long-Term Gas Production from a Gas Hydrate Deposit at the Site of a Planned Field Test in the Ulleung Basin of the Korean East Sea,” OTC 25384 presented at the Offshore Technology Conference, Texas, USA, May 5-8.
Moridis, G.J., Kim, J.H., Reagan, M.T., and Kim, S.J., 2013, “Feasibility of gas production from a gas hydrate accumulation at the UBGH2-6 site of the Ulleung basin in the Korean East Sea,” J. of Petroleum Science and Engineering, Vol. 108, pp. 180-210.
Moridis, G.J., Kowalsky, M.B. and Pruess, K., 2008, “TOUGH+HYDRATE v1.0 User’s Manual: A Code for the Simulation of System Behavior in Hydrate-Bearing Geological Media,” LBNL-149E, Lawrence Berkely National Laboratory, California, U.S.A.
Moridis, G.J., Reagan, M.T., Kim, S.J., Seol, Y. and Zhang, K., 2009, “Evaluation of the Gas Production Potential of Marine Hydrate Deposits in the Ulleung Basin of the Korean East Sea,” SPE Journal, Vol. 14, No. 4, pp. 759-781.
National Energy Technology Laboratory(NETL), 2014, Oil & Natural Gas Technology, U.S DOE Award No.: DE- FE0010295.
Park, K.P., 2008, “Gas Hydrate Exploration: Overview and Status,” J. of the Korean Society for Geosystem Engineering, Vol. 45, No. 5, pp. 590-600.
Ryu, B.J., Collett, T.S., Riedel, M., Kim, G.Y., Chun, J.H., Bahk, J.J., Lee, J.Y., Kim, J.H. and Yoo, D.G., 2013, “Scientific results of the Second Gas Hydrate Drilling Expedition in the Ulleung Basin (UBGH2),” Marine and Petroleum Geology, Vol. 47, pp. 1-20.
Seo, K.W., Lim, J.S. and Lee, J.H., 2010, “Estimation of Petrophysical Properties in Gas Hydrate Bearing Sediments using the 1st Well Data in Ulleung Basin, Offshore Korea,” J. of the Korean Society for Geosystem Engineering, Vol. 47, No. 1, pp. 70-80.
Shin, H.J., Lim, J.S. and Kim, S.J., 2012, “Estimation of Porosity and Saturation in Gas Hydrate Bearing Sediments using Well Logs and Core Analysis Data of the 2nd Wells in Ulleung Basin, East Sea, Korea,” J. of the Korean Society for Geosystem Engineering, Vol. 49, No. 2, pp. 175-185.

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 : 52
No :5
Pages :500-510
DOI :https://doi.org/10.12972/ksmer.2015.52.5.500

[1] Collett, T.S., 2002, “Energy resource potential of natural gas hydrates,” AAPG Bulletin, Vol. 86, No. 11, pp. 1971- 1992.

[2] Huh, D.G., 2005, “Status of Gas Hydrate Research in Korea,” J. of the Korean Society for Geosystem Engineering, Vol. 42, No. 3, pp. 206-213.

[3] Kim, D. and Lee, J., 2010, “Gas Hydrate R&D International Trends and Patent Analysis,” J. of the Korean Society for Geosystem Engineering, Vol. 47, No. 4, pp. 464-474.

[4] Kim, H.M., 2015, “Numerical Analysis for Geomechanical Deformation of Sea Bed due to Gas Hydrate Dissociation,” J. of the Korean Society Mineral and Energy Resources Engineers, Vol. 52, No. 2, pp. 148-157.

[5] Kim, J.S., Lee. R.S, Lim, J.S. and Kim, S.J., 2014, “Numerical Analysis on Flow Behavior of Gas Hydrate Bearing Sediments in the Ulleung Basin, East Sea of Korea,” J. of Energy Engineering, Vol. 23, No. 3, pp. 102-115.

[6] Kvenvolden, K.A., 1998, “A primer on the geological occurrence of gas hydrate,” Geological Society Special Publication, Vol. 137, pp. 9-30.

[7] Lee, D.G., Shin, H.J. and Lim, J.S., 2013, “3D Spatial Distribution Modeling for Petrophysical Property of Gas Hydrate-Bearing Sediment using Well Data in Ulleung Basin,” J. of Energy Engineering, Vol. 22, No. 2, pp. 156-168.

[8] Lee, S.R., Kim, D.S., Ryu, B.J., Bahk, J.J., Yoo, D.G., Kim, G.Y., Lee, J.Y., Yi, J.S., Collett, T.S., Riedel, M. and Torres, M.E., 2011, “Recent Developments of Gas Hydrate Program in Korea: Ulleung Basin Gas Hydrate Drilling Expedition 2,” Proceedings of the 7th International Conference on Gas Hydrates, Scotland, United Kingdom, July 17-21.

[9] Majumdat, U., Cook, A,. Ismail, S., Frye, M. and Shedd, W., 2014, “Gas Hydrate Assessment in the Northern Gulf of Mexico: Preliminary Results Reveal New Prospects,” Fire in the Ice, Vol. 14, No. 2, pp 1-3.

[10] Moridis, G.J. and Reagan, M.T., 2007a, “Strategies for Gas Production from Oceanic Class3 Hydrate Accumulations,” OTC 18865 presented at the Offshore Technology Conference, Texas, USA, April 30-May 3.

[11] Moridis, G.J. and Reagan, M.T., 2007b, “Gas Production From Class 2 Hydrate accumulations in the Permafrost,” Proceedings of the SPE Annual Technical Conference and Exhibition, California, USA, November 11-14.

[12] Moridis, G.J., Kim, J.H., Reagan, M.T and Kim, S.J., 2014, “System Response During Short- and Long-Term Gas Production from a Gas Hydrate Deposit at the Site of a Planned Field Test in the Ulleung Basin of the Korean East Sea,” OTC 25384 presented at the Offshore Technology Conference, Texas, USA, May 5-8.

[13] Moridis, G.J., Kim, J.H., Reagan, M.T., and Kim, S.J., 2013, “Feasibility of gas production from a gas hydrate accumulation at the UBGH2-6 site of the Ulleung basin in the Korean East Sea,” J. of Petroleum Science and Engineering, Vol. 108, pp. 180-210.

[14] Moridis, G.J., Kowalsky, M.B. and Pruess, K., 2008, “TOUGH+HYDRATE v1.0 User’s Manual: A Code for the Simulation of System Behavior in Hydrate-Bearing Geological Media,” LBNL-149E, Lawrence Berkely National Laboratory, California, U.S.A.

[15] Moridis, G.J., Reagan, M.T., Kim, S.J., Seol, Y. and Zhang, K., 2009, “Evaluation of the Gas Production Potential of Marine Hydrate Deposits in the Ulleung Basin of the Korean East Sea,” SPE Journal, Vol. 14, No. 4, pp. 759-781.

[16] National Energy Technology Laboratory(NETL), 2014, Oil & Natural Gas Technology, U.S DOE Award No.: DE- FE0010295.

[17] Park, K.P., 2008, “Gas Hydrate Exploration: Overview and Status,” J. of the Korean Society for Geosystem Engineering, Vol. 45, No. 5, pp. 590-600.

[18] Ryu, B.J., Collett, T.S., Riedel, M., Kim, G.Y., Chun, J.H., Bahk, J.J., Lee, J.Y., Kim, J.H. and Yoo, D.G., 2013, “Scientific results of the Second Gas Hydrate Drilling Expedition in the Ulleung Basin (UBGH2),” Marine and Petroleum Geology, Vol. 47, pp. 1-20.

[19] Seo, K.W., Lim, J.S. and Lee, J.H., 2010, “Estimation of Petrophysical Properties in Gas Hydrate Bearing Sediments using the 1st Well Data in Ulleung Basin, Offshore Korea,” J. of the Korean Society for Geosystem Engineering, Vol. 47, No. 1, pp. 70-80.

[20] Shin, H.J., Lim, J.S. and Kim, S.J., 2012, “Estimation of Porosity and Saturation in Gas Hydrate Bearing Sediments using Well Logs and Core Analysis Data of the 2nd Wells in Ulleung Basin, East Sea, Korea,” J. of the Korean Society for Geosystem Engineering, Vol. 49, No. 2, pp. 175-185.

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

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