Besides, there are large scale of tight sandstone gas-reservoirs occurred in sandstone formations which are interbedded or nearly the hydrocarbon source rock of deep buried Triassic and Jurassic.

• 另外,埋深较大的侏罗系及三叠系中与烃源岩互层或很近的砂岩中存在规模很大的致密砂岩气藏;