潮控河口湾环境下的沉积相特征研究——以D-F油田M1油藏为例

发布时间：2019-01-26 14:36

【摘要】：综合利用岩心、测井及地震资料,对T区块D-F油田M1油藏进行了层序划分,并建立等时层序地层对比格架,认为M1层为1个四级层序,可划分为M1-Zone、M1SS-1、M1SS-2和M1SS-3共4个五级旋回。在层序划分的基础上,根据岩心中的潮汐韵律层理、交错层理等沉积构造特征及构造演化、生物遗迹等证据,对研究区沉积相类型及特征、沉积相平面及纵向展布特征和沉积相演化模式进行研究。结果表明,地区整体为海侵体系域,沉积相类型为潮控河口湾沉积和陆棚相沉积,潮控河口湾沉积主要发育在M1SS-1、M1SS-2和M1SS-3旋回,微相类型主要有潮汐砂坝沉积、潮汐砂坪沉积、混合坪沉积及潮汐水道沉积等。陆棚相沉积发育在M1-Zone旋回,微相类型包括陆棚砂沉积和陆棚泥沉积。进一步分析沉积相展布和沉积环境特点,推断其沉积模式为河流相和潮控河口湾相—完整的潮控河口湾相—潮控河口湾相和小规模的陆棚相—发育含海绿石砂岩和泥岩的陆棚相。
[Abstract]:Based on the core, logging and seismic data, the M 1 reservoir in T block D-F oilfield is sequenced and the isochronous sequence stratigraphic correlation framework is established. It is considered that M1 is a four order sequence, which can be divided into M 1 Zone M 1 SS-1. There are four five-stage cycles in M1SS-2 and M1SS-3. On the basis of sequence division, the types and characteristics of sedimentary facies in the study area are analyzed according to the characteristics of sedimentary structures, such as tidal rhythmic bedding, staggered bedding and other evidences of structural evolution, biological relics, etc. The plane and longitudinal distribution characteristics of sedimentary facies and the evolution model of sedimentary facies were studied. The results show that the whole area is transgressive system tract, the sedimentary facies type is tidal estuary bay deposit and shelf facies deposit, the tidal controlled estuary bay deposit is mainly developed in M1SS-1M1SS-2 and M1SS-3 cycle, and the microfacies type is mainly tidal bar deposit. Tidal sand flat deposits, mixed flat deposits and tidal channel deposits. Shelf facies deposits developed in the M1-Zone cycle, and the microfacies types include shelf sand deposits and shelf mud deposits. Further analyzing the distribution of sedimentary facies and the characteristics of sedimentary environment, It is inferred that the sedimentary models are fluvial facies and tidal controlled estuarine facies, integrated tidal control estuarine facies, tidal controlled estuarine facies and small-scale shelf facies, which contain marine turquoise sandstone and mudstone.
【作者单位】：中国石油大学(华东)地球科学与技术学院;中国石油大学(华东)非常规油气与新能源研究院;中国石油勘探开发研究院;
【基金】：国家自然科学基金项目“拟海底反射层BSR的地震精细描述和数值模拟研究”(编号:41406050) 中国石化科技攻关项目(编号:P15028) 高校自主创新科研计划项目(编号:15CX05046A,15CX07004A)
【分类号】：P618.13

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