The characteristics of fluid inclusions and pool-forming process of oil and gas reservoirs in the Kela 2 giant gas field, Tarim basin.

The test and analysis of fluid inclusions in the reservoirs is a very effec tive method in studying oil and gas migration and the pool-forming times. T he type and content of fluid inclusions in the reservoirs are evidently cor relative with petroleum of reservoirs in Kela 2 gas field. The occurrence a nd data of homogenization temperature and composition of fluid inclusions s how that the oil and gas began to charge in early stage, preserved in the r eservoirs since then, and until cracked dry gas. There is one main peak in homogenization temperature of organic fluid inclusions in the reservoirs. T here are three main peaks in homogenization temperature of salt water fluid inclusions, and the first one is inconsistent with that of organic fluid i nclusions. So the temperature of 60 similar to 120 degreesC is the one of o il and gas charge and the pool forming, while the temperature of 120 simila r to 160 degreesC is the one of oil and gas reservoirs buried deepest, whos e depth is 5800m, and the temperature of 220 similar to 330 degreesC is the one of oil and gas reformed by hige-temperature-liquid. The Kela 2 gas fie ld has formed very pure dry gas pool at that temperature.