IMPLICATION TO KELA 2 GAS FIELD FROM WATER\|SOLUBLE GAS\= ACCUMULA TION IN HETIANHE GAS FIELD
和田河气田水溶气成藏特点对克拉2气田的启示

The gas accumulation in the Kela 2 gas field has been widely noticed. There remain some problems still to be solved. Drawing lessons from the water-soluble gas accumulation condition and characteristics in the Hetianhe gas field, this paper indicates that the Kela 2 gas field has an even better water-soluble gas accumulation condition. The gas generated from the Mesozoic coal measure source rocks could be dissolved in water in a great deal at high temperature and pressure and kept in deeper layers in the form of water-soluble state. As the Neotectonics had created fault-related traps, the water-soluble gas in deeper layers migrated along faults up to Tertiary and Cretaceous traps. The gas with some traces of water-soluble origin then released from water when the temperature and pressure deceased, and the gas pools were formed in this way. Simulative calculation shows that the water can release abundant gas when migrating to the shallow part. The unreleased gas at high pressure water body under the water-gas interface has a largish reserve, too. With the development of the gas field, the gas in water can release gradually. This has much significance for the reassessment of the recoverable reserves and exploitation years.