Abstract: Comparative analysis on natural gas reservoir-forming condition demonstrated that their common points are both of them have sufficient gas source supplies, existing numerous fold anticline structures, developing effective regional cap bed. However, the differences between them are that in Kuche depression, reservoir is in favorable quality, hydrocarbon-source-connecting faults developed much better, and existed better preservation conditions. The paper also presents the natural gas exploration orientation and the initial problems to be solved first.

Key words: Junggar basin, Kuche depression, natural gas, gas-reservoir formation, condition, gas-source-rock, anticline, reservoir bed, comparison