黄骅盆地港西开发区新近系明化镇组沉积微相特征  

Sedimentary Microfacies Characteristics of Neogene Minghuazhen Formation in Gangxi Development Area of Huanghua Basin,East China

作　　者：陈留勤[1,2,3] 田昌炳[4] 胡水清[4] 

机构地区：[1]江西省核资源与环境重点实验室,江西南昌330013 [2]中国地质科学院地质研究所,北京100037 [3]东华理工大学地球科学学院,江西南昌330013 [4]中国石油勘探开发研究院,北京100083

出　　处：《东华理工大学学报（自然科学版）》2013年第4期375-380,共6页Journal of East China University of Technology(Natural Science)

基　　金：国家科技重大专项(2008ZX05010);博士后科研启动基金项目(DHBHK1102);江西省博士后科研择优资助项目;东华理工大学核资源与环境教育部重点实验室开发基金项目(NRE1210)

摘　　要：综合利用油田开发区岩心和测井等资料,对黄骅盆地港西开发区一区1断块新近系明化镇组进行沉积微相研究。结果表明,明化镇组为中-高弯度曲流河沉积,沉积微相单元可以细分为主河道、支河道、河间溢岸沉积、废弃河道和泛滥平原等,不同的微相单元在测井曲线上具有较好的电性响应特征。在总结沉积微相发育模式的基础上,认为在高可容纳空间体系阶段,孤立的条带状河道砂体镶嵌在大面积分布的河间及泛滥平原细粒沉积背景当中,河道砂体被泥岩所分隔;而在低可容纳空间体系阶段,多层不同期次的河道砂体发生切割叠置,造成砂体厚度较大,连通性较好。垂向上,河道砂体的不同配置方式体现了A/S比值随时间的旋回性变化的控制作用。Data of cores and well logs are integrated to study sedimentary microfacies characteristics of Neogene Minghuazhen Formation in the I -1 Fault-Block of Gangxi development area in Huanghua basin. The results show that Minghuazhen Formation is the deposits of a medium to high-sinuosity meandering river sedimentary system, in which main channel, distributary channel, interfluvial overbank, abandoned channel and flood plains could further be distinguished and mapped. The different microfacies units could be corresponded to obvious well log features. Based on the planar distribution characteristics of sedimentary microfacies, two depositional models of high and low accommodation systems stages could be constructed for Minghuazhen Formation. For the high accom- modation systems stage, isolated ribbon channel sandstones are sparsely distributed in a large area of flood plains mainly composed of fine sediments, which leads to separation of channel sandstones by interfluvial mudstones. In contrast, for the low accommodation systems stage, multi-storey channel sandstones are truncated and overlaid, which results in the large thickness and good continuity. In the vertical direction, the different stacking patterns of channel sandstones reflect controlling of cyclic changes of A/S ratio over time.

关 键 词：沉积微相 可容纳空间 明化镇组 港西开发区 黄骅盆地 

分 类 号：P588.2[天文地球—岩石学]