Evaluation of deepwater gas-hydrate systems
نویسنده
چکیده
margins contain vast reserves of gas hydrate, a frozen form of natural gas that is embedded in cold, near-seafloor strata. Published estimates suggest that the energy represented by gas hydrate may exceed the energy available from conventional fossil fuel by a factor of 2 or more. Understanding marine hydrate systems has become critical for long-term worldwide energy planning. Groups in several nations are attempting to evaluate the resource and to define seafloor stability problems across hydrate accumulations. Affordable, reliable, remotely based methodologies for evaluating deepwater gas-hydrate systems have been slow to develop. Four-component ocean-bottomcable (4-C OBC) technology offers an option for remote, detailed evaluation of deepwater, near-seafloor geology. Increasing use of marine multicomponent seismic technology by oil and gas companies now allows marine gas-hydrate systems to be studied over areas of many square kilometers and the geomechanical properties of the strata that confine these hydrates to be analyzed.
منابع مشابه
Theoretical Modeling and Analysis for Gas Hydrate Quantification from Prestack Seismic Data in the Northern Deepwater Gulf of Mexico
متن کامل
Seafloor reflectivity—An important seismic property for interpreting fluid/gas expulsion geology and the presence of gas hydrate
tivity phenomenon that is widely accepted as indicating the base of the gas-hydrate stability zone. The acoustic impedance difference between sediments invaded with gas hydrate above the BSR and sediments without gas hydrate, but commonly with free gas below, are accepted as the conditions that create this reflection. The relationship between BSRs and marine gas hydrate has become so well known...
متن کاملModeling of Gas Hydrate Formation in the Presence of Inhibitors by Intelligent Systems
Gas hydrate formation in production and transmission pipelines and consequent plugging of these lines have been a major flow-assurance concern of the oil and gas industry for the last 75 years. Gas hydrate formation rate is one of the most important topics related to the kinetics of the process of gas hydrate crystallization. The main purpose of this study is investigating phenomenon of gas hyd...
متن کاملModeling of Gas Hydrate Formation in the Presence of Inhibitors by Intelligent Systems
Gas hydrate formation in production and transmission pipelines and consequent plugging of these lines have been a major flow-assurance concern of the oil and gas industry for the last 75 years. Gas hydrate formation rate is one of the most important topics related to the kinetics of the process of gas hydrate crystallization. The main purpose of this study is investigating phenomenon of gas hyd...
متن کاملMulti-Component-Multiphase Flash Calculations for Systems Containing Gas Hydrates by Direct Minimization of Gibbs Free Energy
The Michelsen stability and multiphase flash calculation by direct minimization of Gibbs free energy of the system at constant temperature and pressure, was used for systems containing gas hydrates. The solid hydrate phase was treated as a solid solution. The fugacities of all components of the hydrate phase were calculated as a function of compositions by the rearranged model of van der Wa...
متن کامل