Wang Dayong

TL;DR: In this article, the authors investigated the role of the sensible heat of the reservoir and ambient heat transfer in hydrate dissociation in natural gas hydrate reformation and ice generation.

TL;DR: In this article, a traditional single-vertical-well system and a new dualverticalwell system were proposed, and special production strategies of the aggressive depressurization and permeability improvement were applied to these two systems for the effectiveness verification.

TL;DR: In this article, the authors aimed at the application of the horizontal wells to the oceanic methane hydrate (MH) production in the Nankai Trough, Japan, and the sensitivity analyses indicated that a favorable gas production rate of 8.64-×-105m3/day could be obtained within the first year, even under a relatively low injection temperature of 40 °C and a relatively small injection rate of 2 kg/s/m of well.

TL;DR: In this paper, a 3D reservoir model combined with multiple-well systems was established, and long-term numerical simulations of gas production from methane hydrate reservoirs by depressurization were conducted to reveal the complex phenomena of pressure propagation, heat transfer, and gas-liquid two-phase flow in different production systems through 3D visualization.

TL;DR: In this article, the mechanical properties of CO 2 hydrate-bearing sediments were measured by a low-temperature and high-pressure triaxial compression apparatus and the strength differences between the CO 2 and CH 4 hydrate bearing sediments are then analyzed to evaluate the safety of the CH 4 -CO 2 replacement method.