Abstract: The Liuchu Oilfield is a complicated block oil pool，which is located at the Shanwang faulted nose structure in the Liuchu structural belt of central southern Raoyang Sag，Central Hebei Depression. Currently the oilfield produces a fairly high water-cut. The main facies indicators of the fluvial sandbodies have been established based on the comprehensive analyses of core description，correlation and division of stratigraphic intervals，individual sandbody microfacies and log facies description. The results indicate that during the deposition of Member 2 and Member 3 of Dongying Formation，the Liuchu area was dominated by the low-sinuosity braided fluvial facies. The main petroliferous sandbodies can be divided into fluvial channel，fluvial bank and flood plain subfacies which are further subdivided into channel-bed lag, point bar，natural levee, crevasse splay，overbank and flood plain microfacies. The following characteristics for the sandbodies of different microfacies were also discussed. The adjustment of jection-production relationship of petroleum reservoir can be made according to the internal heterogeneity of the sandbodies of different microfacies. It is also a reliable geologic foundation for petroleum field exploitation.

Key words: Central Hebei Depression, Liuchu Oilfield, sedimentary microfacies, individual petroliferous sandbody, permeable

摘要： 留楚油田位于冀中坳陷饶阳凹陷中南部留楚构造带善旺断鼻，是古近纪东营组复杂断块油藏，目前已处于中高含水期。通过对岩心描述、小层对比与划分、单砂体沉积微相描述及测井相的综合分析，总结了留楚油田河流相砂体的主要相标志，分析认为东二段、东三段沉积时期留楚地区以低弯度曲流河沉积为主，并将主力含油单砂体所在地层划分了河道、堤岸和河漫3个亚相，以及河床滞留沉积、边滩、天然堤、决口扇、河漫滩、泛滥平原6个沉积微相；结合动态资料分析，指出沉积微相对储集层物性的控制作用，探讨了不同微相砂体的渗流特征；认为应根据不同沉积微相砂体的空间展布和层内非均质性特征，进行油藏注采关系调整和确定目标潜力区，为制订合理的油气田开发调整方案提供可靠的地质依据，为同类油藏的研究与开采提供借鉴。

关键词: 冀中坳陷, 留楚油田, 沉积微相, 含油单砂体, 渗流特征

CLC Number: 

• P588.2