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The Kela-2 gas field is located in the center ofKelasu structural belt in Kuqa Depression. This trap is oneof a series of traps in the folded belts which are distributed ina string of pearls in the dual structure. The primary gas-bearing layers are sandstone of Lower Cretaceous K_1bswhile the secondary layers are dolomite member and gluten-ite member of Lower Tertiary E_(1-2)km and sandstone ofLower Cretaceous K_1b. The main component of natural gasis methane whose content is higher than 97%. It is charac-terized by dry gas whose source rock is Jurassic coal meas-ure. The Kela-2 structural trap was formed during the Xiyuperiod and then became a reservoir in the late time. The res-ervoir formed late and the thick seal rock of Lower Tertiarygipsmantle are the avail reason why the giant Kela-2 gasfield has been well kept. The abnormal high pressure of theKela-2 gas field results from the strong structural compres-sion in the northern part during the Xiyu period.
The trap is one of a series of traps in the folded belts which are distributed in a string of pearls in the dual structure. The primary gas-bearing layers are sandstone of Lower Cretaceous K_1bswhile the secondary layers are dolomite member and gluten-ite member of Lower Tertiary E_ (1-2) km and sandstone ofLower Cretaceous K_1b. The main component of natural gas is methane whose content is higher than 97%. It is charac- terized by dry gas whose source rock is Jurassic coal meas-ure. The Kela-2 structural trap was formed during the Xiyuperiod and then became a reservoir in the late time. The res-ervoir formed late and the thick seal rock of Lower Tertiary gapips are the avail reason why the giant Kela-2 gasfield has been well kept. The abnormal high pressure of the Kela-2 gas field results from the strong structural compres-sion in the northern part during the Xiyu period.