Kuqa depression in Tarim basin has the basic geologic conditions to form medium and large gas pools.The Triassic-Jurassic source rocks not only have very large cumulative gas generating intensity

but also have experienced a very rapid gas generating and discharging process since Neogene;thus they have become highly efficient gas kitchens and played a key role in the formation of Kela 2 type high efficient gas pools.The piedmont thrust zone in Kuqa depression has been strongly deformed due to the compression since Neogene.Vertical superimposition of Cretaceous-Jurassic strata below the halite resulted in increment of rock volume.Being sealed by good caprock

the rock volume enlargement would lead to structural swabbing

an important process for the formation of Kela 2 type high efficient gas pools.Simulation experiments of hydrocarbon-generating kinetics and tectophysics have proved these new understandings and further revealed the effective gas generation of Jurassic source rocks and effective gas migration and accumulation process in Kuqa depression.