Western-slop is a secondary structure unit of northern Songliao basin, and there are more than 260 wells in this area.

西部斜坡是松辽盆地北部的一个二级构造单元，区内共有探井260 多口。

Xisha trough basin is the advantage oil and gas exploration area of the northern continental slop of the South China Sea.

西沙海槽盆地是南海北部陆坡深水区的有利油气勘探区域。