关键词: 原型盆地, 侏罗纪, 烃源岩, 吐哈盆地, 沉积体系

Abstract: The prototype of Turpan–Hami Basin mainly evolved from the Early Middle Jurassic rift basin into Late Jurassic
foreland basin during Jurassic period. The prototype of basin evolution of this period controlled the tectonic sedimentary
patterns，changed the ancient geography，ancient climate conditions adjusted accordingly，and in this particular context of the
ancient landscapes of the period deposited a series of important hydrocarbon source rock. Early in the Jurassic period，under the
warm and humid climates，the Turpan–Hami Basin deposited rivers and lakes，swamp layer system，in which the vast deposits
of dark lacustrine mudstone，carbonaceous mudstone and coal became the most important source rocks. Late Jurassic，the basin
changed into the foothills and fluvial deposition under the arid climate conditions，with little hydrocarbon source rocks. The
Lower and Middle Jurassic Badaowan and Xishanyao Coal Measures are the main source rocks of this period，Middle Jurassic
Qiketai lacustrine deposition to semi-deep lake deposition，is a secondary hydrocarbon basin source rock.

Key words: prototype basin, Jurassic, source rocks, Turpan–Hami Basin, sedimentary system