胜利油区孤南洼陷古、新近系充填层序与沉积环境

孤南洼陷是济阳坳陷沾化凹陷的一个新生代次级洼陷。边界断层的活动差异性造成洼陷形态为典型的南超北断的箕状洼陷；多次的构造运动形成了湖盆的多次抬升剥蚀和沉降。充填序列可以划分为4个构造层序；沉积体系可划分出河流、扇三角洲、三角洲及湖泊体系等4种；洼陷的沉积受同沉积构造活动及物源补给状况的控制。

Paleogene-Neogene filling sequences and sedimentary environments in the Gunan sag, Shengli Oil Field, Shandong

The Gunan sag is a Cenezoic secondary depression within the Zhanhua sag of the Jiyang depression. The differences of the boundary faulting resulted in the formation of a half graben-like morphology of the sag, which is overlapped in the north and faulted in the south. The polyphase tectonic activities once gave rise to the polystage uplifting, erosion and subsidence of the lake basin. The Paleogene-Neogene filling sequences may be divided into four structural sequences that correspond to four tectonic episodes in the study area. The depositional systems consist of fluvial, fan delta, delta and lacustrine systems. The sediments within the Gunan sag are generally controlled by syndepositional tectonism and provenances.