Eastern Zhanhua sag is one of the most complicated tectonism areas in Jiyang depression, and it is also one of the most hydrocarbon proliferous areas in Shengli oilfield.

• 沾化凹陷东部是济阳坳陷构造变动最为复杂的地区之一，同时也是胜利油田油气资源最为丰富的地区之一。