Fundamental characteristics of gas hydrate-bearing sediments in the Shenhu area, South China Sea

Abstract

The basic physical properties of marine natural gas hydrate deposits are important to the understanding of seabed growth conditions, occurrence regularity, and occurrence environment of natural gas hydrates. A comprehensive analysis of the core samples of drilling pressure-holding hydrate deposits at a depth of 1310 m in the Shenhu area of the South China Sea was conducted. The experimental results indicate that the particle size in the hydrate sediment samples are mainly distributed in the range from 7.81 µm to 21.72 µm, and the average particle size decreases as the depth of the burial increases. The X-ray CT analytical images and surface characteristics SEM scan images suggest that the sediment is mostly silty clay. There are a large number of bioplastics in the sediment, and the crack inside the core may be areas of hydrate formation.

Keywords

natural gas hydrate / Shenhu area / reservoirs characteristics

参考文献

[1] Makogon Y F, Holditch S A, MakogonT Y. Natural gas-hydrates—a potential energy source for the 21st Century. Journal of Petroleum Science and Engineering, 2007, 56: 14–31

[2] Sloan E D, Koh C A. Clathrate Hydrates of Natural Gases. 3rd ed. Boca Raton: CRC Press, 2008

[3] Zhao J F, Guo X W, Sun M R, N₂O hydrate formation in porous media: a potential method to mitigate N₂O emissions. Chemical Engineering Journal, 2019, 361: 12–20

[4] Dong H S, Zhang L X, Ling Z, The controlling factors and ion exclusion mechanism of hydrate-based pollutant removal. ACS Sustainable Chemistry & Engineering, 2019, 7(8): 7932–7940

[5] Zhao J F, Wang B, Sum A K. Dynamics of hydrate formation and deposition under pseudo multiphase flow. AIChE Journal, 2017, 63(9): 4136–4146

[6] Ripmeester J A, Alavi S. Some current challenges in clathrate hydrate science: nucleation, decomposition and the memory effect. Current Opinion in Solid State and Materials Science, 2016, 20(6): 344–351

[7] Moridis G J, Reagan M T, Boyle K L, Evaluation of the gas production potential of some particularly challenging types of oceanic hydrate deposits. Transport in Porous Media, 2011, 90(1): 269–299

[8] Zhao J F, Fan Z, Wang B, Simulation of microwave stimulation for the production of gas from methane hydrate sediment. Applied Energy, 2016, 168: 25–37

[9] Song Y C, Kuang Y M, Fan Z, Influence of core scale permeability on gas production from methane hydrate by thermal stimulation. International Journal of Heat and Mass Transfer, 2018, 121: 207–214

[10] Wang B, Dong H S, Liu Y, Evaluation of thermal stimulation on gas production from depressurized methane hydrate deposits. Applied Energy, 2018, 227: 710–718

[11] Zhao J F, Wang J Q, Liu W G, Analysis of heat transfer effects on gas production from methane hydrate by thermal stimulation. International Journal of Heat and Mass Transfer, 2015, 87: 145–150

[12] Feng J C, Wang Y, Li X S, Investigation into optimization condition of thermal stimulation for hydrate dissociation in the sandy reservoir. Applied Energy, 2015, 154: 995–1003

[13] Cheng C X, Zhao J F, Yang M J, Evaluation of gas production from methane hydrate sediments with heat transfer from over-underburden layers. Energy & Fuels, 2015, 29(2): 1028–1039

[14] Zhao J F, Fan Z, Dong H S, Influence of reservoir permeability on methane hydrate dissociation by depressurization. International Journal of Heat and Mass Transfer, 2016, 103: 265–276

[15] Zhang L X, Zhao J F, Dong H S, Magnetic resonance imaging for in-situ observation of the effect of depressurizing range and rate on methane hydrate dissociation. Chemical Engineering Science, 2016, 144: 135–143

[16] Zhao J F, Zhu Z H, Song Y C, Analyzing the process of gas production for natural gas hydrate using depressurization. Applied Energy, 2015, 142: 125–134

[17] Zhao J F, Liu D, Yang M J, Analysis of heat transfer effects on gas production from methane hydrate by depressurization. International Journal of Heat and Mass Transfer, 2014, 77: 529–541

[18] Zhang L X, Kuang Y M, Zhang X T, Analyzing the process of gas production from methane hydrate via nitrogen injection. Industrial & Engineering Chemistry Research, 2017, 56(26): 7585–7592

[19] Song Y C, Wang J Q, Liu Y, Analysis of heat transfer influences on gas production from methane hydrates using a combined method. International Journal of Heat and Mass Transfer, 2016, 92: 766–773

[20] Wang B, Fan Z, Zhao J F, Influence of intrinsic permeability of reservoir rocks on gas recovery from hydrate deposits via a combined depressurization and thermal stimulation approach. Applied Energy, 2018, 229: 858–871

[21] Song Y C, Cheng C X, Zhao J F, Evaluation of gas production from methane hydrates using depressurization, thermal stimulation and combined methods. Applied Energy, 2015, 145: 265–277

[22] Fan Z, Sun C M, Kuang Y M, MRI analysis for methane hydrate dissociation by depressurization and the concomitant ice generation. Energy Procedia, 2017, 105: 4763–4768

[23] Wang B, Fan Z, Wang P F, Analysis of depressurization mode on gas recovery from methane hydrate deposits and the concomitant ice generation. Applied Energy, 2018, 227: 624–633

[24] Wang B, Huo P, Luo T T, Analysis of the physical properties of hydrate sediments recovered from the Pearl River Mouth Basin in the South China Sea: preliminary investigation for gas hydrate exploitation. Energies, 2017, 10(4): 531

[25] Kuang Y M, Yang L, Li Q P, Physical characteristic analysis of unconsolidated sediments containing gas hydrate recovered from the Shenhu Area of the South China Sea. Journal of Petroleum Science Engineering, 2019, 181: 106173

[26] Wu S, Zhang G, Huang Y, Gas hydrate occurrence on the continental slope of the northern South China Sea. Marine and Petroleum Geology, 2005, 22(3): 403–412

[27] Zhang H, Yang S, Wu N, Successful and surprising results for China’s first gas hydrate drilling expedition. Fir in the Ice, 2007, 7(3): 6–9

[28] Zhou S W, Chen W, Li Q P, Research on the solid fluidization well testing and production for shallow non-diagenetic natural gas hydrate in deep water area. China Offshore Oil Gas, 2017, 29(4): 1–8 (in Chinese)

[29] Lu H, Kawasaki T, Ukita T, Particle size effect on the saturation of methane hydrate in sediments–constrained from experimental results. Marine and Petroleum Geology, 2011, 28(10): 1801–1805

[30] Shepard F P. Nomenclature based on sand-silt-clay ratios. Journal of Sedimentary Petrology, 1954, 24: 151–158

[31] Gustafsson S, Karawacki E, Khan M N. Transient hot-strip method for simultaneously measuring thermal conductivity and thermal diffusivity of solids and fluids. Journal of Physics. D, Applied Physics, 1979, 12(9): 1411–1421

[32] Liu C L, Meng Q G, Hu G, Characterization of hydrate-bearing sediments recovered from the Shenhu area of the South China Sea. Interpretation (Tulsa), 2017, 5(3): SM13–SM23

版权

2020 Higher Education Press