Category: Methane Gas Hydrate

Economic and Political Issues

The economic production of natural gas from oceanic hydrate deposits will require new offshore drilling systems and methods. Also, the product of hydrate dissocia­tion may be relatively low pressure, wet gas, especially where the excess pressure produced by hydrate dissociation can be equilibrated rapidly through high-porosity sediments. Natural gas derived from hydrate may result in […]

Possible Transportation Routes

If commercial production from oceanic natural gas hydrates is eventually estab­lished, there are at least three ways to transport the gas ashore: (1) by conventional pipeline; (2) by converting the gas hydrates to liquid middle distillates via the newly improved Fischer-Tropsch process and loading them onto a conventional tanker or barge; or (3) by reconverting […]

Marine Hydrates

Subsurface occurrences of natural gas hydrate can be classified into six types: (1) pore-space hydrate, (2) platy hydrate, (3) layered/massive hydrate, (4) dissemi­nated hydrate, (5) nodule hydrate, and (6) vein/dyke hydrate. The anomalies of chloride contents in pore water, core temperature depression, core observation, as well as visible gas hydrates confirmed well-interconnected and highly saturated […]

Arctic Hydrates

Gas hydrates are found within and beneath permafrost on the North Slope of Alaska, in the Canadian Arctic, and in northern Siberia. The Arctic hydrates have the potential to become economically viable sources of natural gas. The best do­cumented Alaskan accumulations are in the Prudhoe Bay-Kuparuk River area, which contains approximately 30 trillion standard cubic […]

Gas Hydrate Reservoirs

There are two gas hydrate reservoirs. They are Arctic hydrates and marine hy­drates. Gas hydrates are found within and under permafrost in Arctic regions. They are also found within a few hundred meters of the seafloor on continental slopes and in deep seas and lakes. The reservoir architecture, technology needs, and eventual economic importance of […]

Chemical Inhibitor Injection Process

The third method is chemical inhibition, a concept similar to the chemical means presently used to inhibit the formation of water ice. This method seeks to displace the natural gas hydrate equilibrium condition beyond the hydrate stability zone’s thermodynamic conditions through injection of a liquid inhibitor chemical adja­cent to the hydrate. The chemical inhibitor injection […]