Improvement of reservoir quality of ultra-deep tight sandstones by tectonism and fluid: A case study of Keshen gas field in Tarim Basin, western China

Junpeng Wang Hongyan Wang Ronghu Zhang Li Dong Ke Wang Zhiyuan Zhang

The Keshen gas field is one of the most important natural gas supply sources in the Tarim basin, western China. The main gas producing interval there is the Lower Cretaceous Bashijiqike Formation(K1bs), it is an ultra-deep tight reservoir whose buried depth exceeds 6000 m, and it shows a low matrix porosity (<10%) and extremely low matrix permeability (<0.1mD). However, this reservoir can supply extremely high and stable gas production due to improvement of reservoir quality by tectonism and fluid.

https://doi.org/10.1016/j.petlm.2023.01.002