... of the occurrence of in situ gas hydrates is very incomplete, and is obtained from both indirect and direct evidence. There have been 23 locations where irrefutable evidence of hydrates has been seen through direct recovery of hydrate samples: 3 in the permafrost and 20 in ocean environments ( Sloan and Koh, 2008...

... Atlantic. This study demonstrates the use of geophysical, geological, and geochemical techniques and data to locate and evaluate the potential gas hydrate resource of these two settings. sediment structural geology onshore permafrost society of petroleum engineers spe 15224 hydrate formation...

... formation is even possible at temperatures 50 or more degrees above the freezing point of water, but the pressure requirements are quite large. ABSTRACT Solid, ice-like mixtures of natural gas and water have been found immobilized in rocks beneath the permafrost in Arctic basins, and in muds under...

... is described. The concept of a downhole heater for use with drill stem testing is also described for testing and evaluation of hydrate intervals. OPEN-HOLE LOGS FOR HYDRATE DETECTION Insitu gas hydrates can occur within and below permafrost in arctic regions. Like permafrost, hydrates show a relatively...

... statistical information is especially interesting. Permafrost sediments (at present) cover about 23% of the total land area of the earth. For example, this represents about 75% of Alaska, 63% of Canada, and 47% of Russia. Depths of freezing of the rocks typically is 500–700 meters, and in some places as deep...