Abstract:

In this paper based on the tectonics and basin evolution of central Asia and its adjacent region，combined with the previous studies，the paleoplate reconstruction and geographic information software were used to analysis the tectonic evolution and oil/gas system of basin group in central Asia. In Early Paleozoic，basins in central Asia and its adjacent region belong to different blocks. Since Early Carboniferous，these blocks began to converge and completely joined together in Early Permian.Before converging the study area was under the influence of Hercynian tectonics，and the basin group formed in Mesozoic stretching tectonic process and Cenozoic compressive tectonic process belong to superimposed basin. The hydrocarbons in the study area mainly accumulate in the Jurassic (41%) and Carboniferous (37%) strata, and the main exploration targets are carbonate rocks，reef limestones，gypsums and mudstones. As for foreland basins， such as Amu-darya，Fergana，Tarim，Turgay and Afghan-Tajik basins，oil and gas mainly accumulate in foreland fold-and-thrust belts and sagging step-fault zones. As for craton basins， such as Precaspian，North Ustyurt and Mangyshulak basins，oil and gas mainly accumulate in the edge，the uplift belts and stepfault zones of the basin，and the source and reservoir are in the same layer.

Key words: central Asia, sedimentary basin, tectonic evolution, hydrocarbon accumulation, oil and gas reserve