黄骅坳陷段六拨油田枣0油层组网状河沉积特征

Anastomosing river sediment of the Zao 0 reservoir group in the Duanliubo Oilfield, Huanghua Depression

黄骅坳陷段六拨油田孔一段枣0油层组为网状河沉积,其沉积特征与曲流河和辫状河有明显区别。分析孔一段沉积背景、岩石类型、沉积韵律、构造、粒度及生物化石,根据岩心观察和测井数据,将网状河沉积划分为网状河砂坝、网状河道、网状河汊道、河道间、天然堤和泛滥平原6种沉积微相。分析每种微相的沉积和平面展布特征,结论是网状河的河道微相相对稳定,天然堤和泛滥平原微相分布较广。

The Zao 0 reservoir group in the Kongyi segment of the Duanliubo Oilfield, Huanghua Depression, composes of anastomosing river sediment. According to the observation of the core and analysis of the logging data, the sedimentary characters of the anastomosing river in the Duanliubo Oilfield is studied,for which 6 main micro-facies are divided,including braided bar, braided channel, braided channel anabranch, inter-channel, natural levees and flood plain. The anastomosing river is developed relatively stable and the natural levees and flood plain are developed widely.