松南张家屯地区下白垩统沉积相特征
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摘要
松南张家屯地区下白垩统沙河子组、营城组、登娄库组及泉头组一段是十屋断陷北斜坡主要的 4套勘探目的层。根据区内仅有的钻井 (松南 75井 )地层的岩性、电性、沉积结构、构造分析 ,结合三维地震特殊处理和地震剖面反射特征的解释 ,将对 4套目的层划分出河流、三角洲 2种主要沉积体系类型 ,以河道、泛滥平原及三角洲平原、三角前缘、前三角洲等 5种主要沉积相类型和若干种微相。断陷期的沙河子组、营城组、登娄库组主要发育三角洲沉积体系 ,泉一段为河流沉积体系。下白垩系统从沙河子组、营城组、登娄库组至泉头组一段表现为前三角洲—三角洲前缘—三角洲平原—河流相的萎缩演化过程。
At Zhangjiatun region,the Shahezi Formation (K 1s),Yingcheng Formation (K 1y) Denglouku Formation (K 1d) and Quantou Formation's first member (K 1q 1) of Lower Cretaceous are the four main exploration target srata at the north slope of Shiwu Fault Depression.According to the lithology,log data,sedimentary texture and structural analysis of the strata in the only one well (well Songnan-75) and in combination with the special 3-D seismic processing and the interpretation of seismic reflection sections,the four target strata were divided into two sedimentary systems;i.e.the fluvial and deltaic sedimentary systems,five sedimentary facies,i.e.the channel,flood plain,delta plain,delta front and prodelta facies and several microficies.In fault depression period,the deltaic sedimentary system was developed in K 1s,K 1y and K 1d and the fluvial sedimentary system in K 1q 1.A shriveled evolution process of prodelte—delta front—delta plain—fluvial facies was found from K 1s,K 1y and K 1d to K 1q 1。
At Zhangjiatun region,the Shahezi Formation (K 1s),Yingcheng Formation (K 1y) Denglouku Formation (K 1d) and Quantou Formation's first member (K 1q 1) of Lower Cretaceous are the four main exploration target srata at the north slope of Shiwu Fault Depression.According to the lithology,log data,sedimentary texture and structural analysis of the strata in the only one well (well Songnan-75) and in combination with the special 3-D seismic processing and the interpretation of seismic reflection sections,the four target strata were divided into two sedimentary systems;i.e.the fluvial and deltaic sedimentary systems,five sedimentary facies,i.e.the channel,flood plain,delta plain,delta front and prodelta facies and several microficies.In fault depression period,the deltaic sedimentary system was developed in K 1s,K 1y and K 1d and the fluvial sedimentary system in K 1q 1.A shriveled evolution process of prodelte—delta front—delta plain—fluvial facies was found from K 1s,K 1y and K 1d to K 1q 1。
引文
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2 李思田.含能源盆地沉积体系.北京:中国地质大学出版社,1996:97～106
3 冯增昭.中国沉积学.北京:石油工业出版社,1994:458～470
4 刘宝王君.岩相古地理基础工作方法.北京:地质出版社,1985:90～105
5 王果寿.松辽盆地十屋—德惠地区沉积体系特征.石油与天然气地质,2001;(4):331～336
6 唐黎明,何兴华.松辽盆地梨树凹陷泉头组沉积特征.石油与天然气地质,2002;(3):266～268
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