The sedimentary system of the Sanjianfang Formation in Wenxi-Ⅰ and Wen-V blooks in Turpan Harmi Basin contains braided stream delta and subaqueous part of prodelta.They include mainly subaqueous distributory channal

flood plain

river mouth bar

sheet bar

distal bar and prodelta clay sedimentary microfacies

and channel bar and flood plain splay submicrofacies.Different microfacies resulted in different affections in reservoir characters

oil possibility and productivity due to different reservoir heterogeneities.Generally speaking

channel bar and distributary channel microfacies have better reservoir characters

their oil possibility and productivity are the best

whereas river uonth bar

sheet bar and distal bar are secondary

and flood splay is relatively poor.