Numerical simulation of gas production from hydrate-bearing sediments in the Shenhu area by depressurising: The effect of burden permeability

Numerical analysis of experimental studies of methane hydrate formation in a sandy porous medium

“…These efforts have provided a wealth of information on the occurrence of MH in nature and resulted in several successful gas production field tests from permafrost-associated and marine hydrate deposits. These include: (a) the gas production tests at the Mallik site at the Mackenzie River Delta in Northwest Territories, Northern Canada in 2002 (involving thermal stimulation of a hydrate deposit) [31] and in [2007][2008] (involving depressurization-induced dissociation of a separate hydrate layer) [32]; (b) the Mount Elbert Well at the Alaska North Slope (USA) in 2007 (involving depressurization-induced dissociation) [33]; (c) the Ignik-Sikumi field trials at the Alaska North Slope (USA) in 2012, which involved both (i) a shorter-term CH4 exchange with a CO2/N2mixture, as well as (ii) a longer-term depressurization [34], and two recent depressurization-based production tests from offshore deposits: (d) the Nankai Trough test in 2013 (Japan) [35] and (e) the test in the Shenhu area of the South China Sea in 2017 (China) [36], [37]. These field tests have demonstrated the potential of gas production from hydrate reservoirs using conventional production technologies.…”

Numerical simulations of depressurization‐induced gas production from hydrate reservoirs at site GMGS3‐W19 with different free gas saturations in the northern South China Sea

“…52 It was developed by the Lawrence Berkeley National Laboratory and has been widely used in production prediction due to its high accuracy. [53][54][55][56][57][58][59][60][61] The geological system simulated in this paper is located in the Shenhu area (Figure 1). It is in the Pearl River Mouth Basin, one of the most important petroliferous basins on the northern slope of the SCS.…”

Gas production from a silty hydrate reservoir in the South China Sea using hydraulic fracturing: A numerical simulation

“…Therefore, the model built should handle the complex multifield coupling processes and cover different phases. In this work, TOUGH + HYDRATE 62 software was employed to address this issue because the software was generally used to simulate gas recovery from hydrate reservoirs in marine and permafrost regions, 27,28,30,[63][64][65] The geomechanical response was not considered because the influence of effective stress variation on the sediment and fracture properties in GHBS at this site during depressurization is currently unclear, even though the coupled thermo-hydro-mechanical model was proposed and used to perform the coupling processes during drilling and gas recovery. 25,29,[66][67][68][69][70][71][72] However, the assigned permeability of fractures takes the influence of the effective stress into account.…”

“…Consequently, many investigations (eg, Refs. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] have been performed recently, and numerical simulations have still focused on depressurization that is aimed at commercial production from potential target areas. In practice, depressurization has also been widely adopted in field trials in Mallik, 34 the eastern Nankai Trough, 35,36 and the South China Sea.…”