An Introduction to the Application of Marine Controlled-Source Electromagnetic Methods for Natural Gas Hydrate Exploration

Natural gas hydrates have been an unconventional source of energy since the beginning of this century. Gas-hydrate-filled reservoirs show higher resistivity values compared with water-filled sediments. Their presence can be detected using marine controlled-source electromagnetic methods. We classify acquisition configurations into stationary and...

Numerical study of response behaviors of natural gas hydrate reservoir around wellbore induced by water jet slotting

The trial production of natural gas hydrate reservoirs remains poor. Reasonable reservoir reconstruction, which can improve formation permeability, is an important approach to increasing the efficiency and enhancing production. In this work, water jet slotting is proposed to reconstruct an natural gas hydrate reservoir near a wellbore. The...

Determination of the CO2 gas consumption rate due to dissolution and hydrate formation in porous media

For a long time gas hydrates were considered to be a hindrance for the natural gas and oil industry. However, since natural gas hydrates deposits were discovered in 1967 the conception of natural gas hydrates as an important energy resource is well accepted. Latest estimations indicate that the amount of natural gas stored in hydrate form is...

Formation of Methane and Carbon Dioxide Hydrates in Bulk and in Porous Media

Gashydraatvorming is een kristallisatieproces. Dit proces bestaat uit twee fases, respectievelijk nucleatie (de vorming van nucleatie kernen) en hydraatgroei (degroei van kleine nucleatiekernen tot grote hydraatkristallen). Deze twee fases van het kristallisatieproces worden in het binaire systeem gekenmerkt door de nucleatietijd en de...

Separation of a CO2+CH4 gas mixture by gas hydrate formation: An experimental study

The purpose of this study is to gather information about the gas hydrate formation when an equimolar gas mixture of CO2 and CH4 is injected on top of a liquid aqueous phase at 275.85 K and various pressures ranging between 2.5 and 6.0 MPa . With these experiments it can be determined if there is preferred gas hydrate formation with CO2 or CH4....

Methane Production from Gas-Hydrate Using Depressurization Method

Gas hydrates are significant resource of natural gas existing both on-shore buried under the permafrost and off-shore buried under oceanic and deep lake sediments. Earlier studies have demonstrated that large volumes of gas can be produced from gas hydrate accumulations by means of depressurization-induced dissociation using vertical wells. In...