辽河滩海地区下第三系沉积体系及分布特征

运用地震地层学、层序地层学、测井沉积学分析手段，对辽河滩海地区下第三系的沉积体系及展布特征进行了研究。其结果，识别出6种主要沉积体系类型，即泛滥平原、扇三角洲、辫状河三角洲、三角洲、湖底扇及湖泊相。油气勘探实践表明：三角洲、扇三角洲和泛滥平原沉积体系发育了该区最重要的储集砂体；湖底扇沉积体系发育的砂体是潜在的、具有良好油气勘探前景的储集层。

Sedimentary system and distribution features of lower Tertiary in Liaohe tidal zone

Sedimentary system and distribution features of early Tertiary in Liaohe tidal zone are studied by using seismic stratigraphy, sequence stratigraphy, and logging sedimentology. As a result, 6 major sedimentary systems are i-dentified, which are flood plain, fan-delta, braided river delta, delta, sublacustrine fan and lake facies. Oil exploration practice shows that the most important reservoir sands of this area developed in sedimentary systems of delta, fan-delta and flood plain. Sands developed in sublacustrine fan system are potential reservoir rocks with prospective exploration future.