Abstract: Commercial hydrocarbon nows have been obtained in five series of strata (formations) in Kuche Depression, leading to the discovery of multiple large reservoirs. In terms of hydrocarbon sources conditions, trap conditions, reservoir-cap combinations and preservation conditions, the paper made a systematic analysis on the reservoir formation and evolution in Kuche foreland basin, and pointed out that there exist a large variety of reservoir types,hydrocarbon bearing intervials, which are mostly distributed along the faulted surface and unconformable surfaces. Hydrocarbon ac- cumulation is controlled by tectonic framework, regional cap formation, faults and unconformable surfaces.

Key words: Kuche depression, reservoir formation, reservoir types, oil and gas accumulation