摘要：

柳赞油田位于河北省滦南县与唐海县交界处,是冀东油田的主力油田之一。构造上处于燕山褶皱带前缘，渤海湾盆地南堡凹陷的东部。受柏各庄断层活动及古斜坡地形的影响，该区古近系沙三段地层属于近源快速堆积沉积，分选差，成熟度低，岩相复杂，为典型的扇三角洲沉积。通过对沉积特征和沉积相带展布的分析，建立了工区扇三角洲的沉积模式。以层序地层学原理和方法为手段，应用测井和三维地震资料，通过不整合面、湖泛面等层序界面和沉积旋回的识别，将柳赞油田沙河街组地层划分为4个准层序组，12个准层序，建立了高分辨率的层序地层格架，分析了准层序在垂向上的叠置样式，把准层序组归纳为进积式和退积式两种类型，确定了优质储层在准层序和准层序组中出现的位置及分布规律。论文在分析沙河街组沉积时期古地形、古气候与古生态特征的基础上，应用砂岩厚度等值线图，恢复了柳赞油田古近系沙河街组岩相古地理面貌。研究表明，工区内发育扇三角洲前缘亚相，分支水道是主要的砂体微相，砂体沿北东－南西向延伸，与古物源方向基本一致。

Abstract:

Liuzan Oilfield , located at the boundary of Luannan County and Tanghai County of Hebei Province , frontal zone of Yanshan fold belt and eastern of Nanpu Sag of Bohaiwan Basin , is one of the most important oil fields of JiDong Oilfield . Influenced by Baigezhuang Fault and inclined palaeotopography , the stratigraphy of Member 3 of Shahejie Formation of Paleogene is characterized with low sorting , low maturity and complicated lithofacies , and as a result fan delta deposition model is built . By method of stratigraphic sequence , stratigraphic boundaries (unconformity surface and lake flooding surface ) and sedimentary cycle of Member 3 of Shahejie Formation in Liuzan Oilfield are recognized with seismic and logging data , and  high resolution sequence frame is made , i.e , 4 parasequence sets and 12 parasequences . The paper analyses  parasequences’ superposition style , divides parasequence sets into progradational sequence and retrograding sequence and  determines the location of excellent reservoirs in parasequences  and parasequence sets . On the basis of  palaeotopography , palaeoclimate , palaeecology and sedimentary facies  analysis , Lithofacies  palaeogeography of Member 3 of Shahejie Formation in Liuzan Oilfield is renewed with isopath map of sandstone . For Member 3 of Shahejie Formation in Liuzan Oilfield , the deposition environment is fan delta front and branch channel is the main sandstone microfacies. Sandstone distributes along north-east direction ,which is identical with that of palaeoprovenance .