东营-惠民凹陷孔店组层序地层学研究

济阳坳陷东营惠民凹陷孔店组基本为深层勘探程度较低的层系。应用测井、地震资料对孔店组进行的层序地层学研究表明 ,孔店组为一个完整的三级层序地层单元 ,发育有低水位体系域、湖侵体系域、高水位体系域和收缩体系域。在孔店组沉积时期 ,东营惠民地区主要发育有五大沉积体系。首次确定了盆地的沉降中心和沉积中心 ,查明了烃源岩的时空分布规律 ,为今后东营惠民的深层油气勘探提供了依据。

PRIMARY STUDY ON SEQUENCE STRATIGRAPHY OF KONGDIAN FORMATION IN DONGYING-HUIMIN SAG

Kongdian formation of Dongying Huimin Sag in Jiyang depression is a deep formation with some hardness for petroleum exploration. The logs and seismic data are applied to study the sequence stratigraphy of Kongdian formation. Kongdian period in Dongying\|Huimin sag developed a complete sequence including lowstand system tract, transgressive system tract, highstand system tract and shrinking system tract. On the whole, the sequence framework is filled by five depositional systems. The depositional centers and the depressed centers in Dongying Huimin sag of Jiyang depression in the Kongdian period are firstly determined. Moreover, the distribution of source rock and favorable zones for the further exploration are presented.