Abstract:

The structures in the southeast of Tarim Basin could be divided into two structural units such as southeast depression and southeast uplift.The depression was a dust-pan shape faulted depression in Jurassic,including Minfeng,Qiemo and Ruoqiang three depocenters and subsidence centers.The depression faulted in the south part but overlapped in the north,with Altun Mountains as the primary provenance and then the uplift being secondary.The main reservoirs are Jurassic System,coal measures and deep lake mudstone are the main source beds.It is considered that the depression is favourable for the formation of small- and mid-size oil and gas fields,oil and gas exploration should focus on anticline fault blook traps;the weathered crusts of Luobuzhuang and north Minfeng Uplifts,Minfeng and Andir circular structural belts,-Qigelek pidemont low terraced structural belt are target areas for oil and gas exploration.

Key words: southeast Tarim Depression, Jurassic System, sedimentary environment, oil generating condition, reservoir property, reservoir origin, oil-gas prospects