Evolution of Ordovician YJ1X ultra-deep oil reservoir in the Yuecan oilfield, Tarim Basin, NW China

YANG Peng,LIU Keyu,LI Zhen,MCINNES Brent Ian Alexander,LIU Jianliang

Fig. 1. Maps showing major tectonic units in the Tarim Basin and location of the study area (a), and a near NE trending structural-stratigraphic section through AA' (b) (modified from Reference [18]). K—Cretaceous; J—Jurassic; T—Triassic; P2—Middle Permian; C1kl—Lower Carboniferous Kalashayi Formation; C1b—Lower Carboniferous Bachu Formation; D3d—Upper Devonian Donghetang Formation; S1t—Lower Silurian Tataerertage Formation; S1k— Lower Silurian Kepingtage Formation; O3s—Upper Ordovician Sangtamu Formation; O3l—q—Upper Ordovician Lianglitage and Qiaerbake formations; O2yj—Middle Ordovician Yijianfang Formation; O1—2y—Middle-Lower Ordovician Yingshan Formation; O1p—Lower Ordovician Penglaiba Formation; —C3ql—Upper Cambrian Xiaqiulitage Group; —C2a—s—Middle Cambrian Awatage and Shayilike formations; —C1w—x—Lower Cambrian Wusonggeer and Xiaoerbulake formations; —C1y—Lower Cambrian Yuertusi Formation; AnZ—Pre-Sinian.