Production behavior of methane hydrate in porous media using huff and puff method in a novel three-dimensional simulator

Replacement micro-mechanism of CH4 hydrate by N2/CO2 mixture revealed by ab initio studies

“…They typically form under high pressure (more than 0.6 MPa) and low temperatures (less than 300 K) [1,2], naturally occurring in marine and permafrost environments. Due to the huge reserves and high energy density [3][4][5], natural methane hydrates are potentially regarded as a strategic energy resource, which have attracted increasing interest worldwide [6][7][8]. To exploit CH 4 form the hydrates, several methods such as thermal treatment, depressurizing, and the addition of inhibitors into the hydrate layer, have been proposed [7,9,10].…”

“…Due to the huge reserves and high energy density [3][4][5], natural methane hydrates are potentially regarded as a strategic energy resource, which have attracted increasing interest worldwide [6][7][8]. To exploit CH 4 form the hydrates, several methods such as thermal treatment, depressurizing, and the addition of inhibitors into the hydrate layer, have been proposed [7,9,10]. However, these methods are based on the decomposition of the hydrates by external stimulations, which may lead to geological disasters such as earthquakes and submarine landslides [11][12][13][14].…”

Effect of geological layers on hydrate dissociation in natural gas hydrate reservoirs

“…Most of the literature on gas production from hydrate reservoirs focuses on homogeneous reservoirs (Moridis, 2003;Li et al, 2007;Moridis and Sloan, 2007;Li et al, 2008;Moridis et al, 2009;Li et al, 2011;Phirani and Mohanty, 2009;Li et al, 2012(b)). The effect of geological layers on hydrate dissociation in a natural gas hydrate reservoirs during depressurisation has not been studied thoroughly.…”

“…4) CO 2 injection (Mohebbi and Behbahani, 2014;White and Mcgrail, 2008), in which methane gas is replaced by CO 2 in clathrate cages. Combination of above methods can also be used to recover gas from hydrate deposits (Li et al, 2011(Li et al, , 2012bYang et al, 2010). In the present study Class 2 hydrate reservoirs are considered for our investigation.…”

Experimental Simulation of the Exploitation of Natural Gas Hydrate

“…The result also verifies that the hydrate decomposition process is a moving boundary ablation process on a three-dimensional level. Li et al [77] also investigated the sensitivities of the hydrate dissociation to the initial hydrate saturation, the hot water injection time during the injection stage of the huff and puff cycle and the temperature of the hot water injected into the CHS. In addition, Li et al [78] developed a pilot-scale hydrate simulator of 117.8 L for gas production from methane hydrate in porous media by a huff and puff method, which was a pioneering study in the field of the natural gas hydrate scientific research.…”