西湖凹陷平湖组岩相类型及沉积相分析

发布时间：2018-08-05 09:50

【摘要】：西湖凹陷平湖组沉积相资料比较单一、研究区域相对局限,对其沉积相类型、展布特征及沉积模式等的认识不清。对西湖凹陷46口平湖组取心井进行岩心观察,根据粒度和沉积构造等的不同来划分岩相,然后根据岩相的成因类型、组合特征及测井曲线特征等来划分沉积相,将平湖组岩相划分为砾岩相、砂岩相和细粒岩相3种类型,并认为平湖组主要发育受潮汐作用影响的三角洲相、潮坪相及局限浅海相等沉积相,并细分出三角洲平原、三角洲前缘、前三角洲、潮上带、潮间带、潮下带、陆架砂脊及陆架泥等亚相。综合考虑平湖期不同时期的区域构造运动、古地貌形态及物源供应等影响因素,建立了西湖凹陷平湖期箕状断陷和潮汐作用控制下的物源-沉积模式,为储层研究奠定了基础。
[Abstract]:The sedimentary facies data of Pinghu formation in Xihu sag are relatively single, and the study area is relatively limited. The types of sedimentary facies, distribution characteristics and sedimentary model of the sedimentary facies are not well understood. The core observation of 46 core wells of Pinghu formation in Xihu sag is carried out, and the lithofacies is divided according to the grain size and sedimentary structure, and then sedimentary facies are divided according to the genetic types, assemblage characteristics and logging curve characteristics of lithofacies, etc. The lithofacies of Pinghu formation are divided into three types: conglomerate facies, sandstone facies and fine-grained lithofacies. It is considered that the Pinghu formation mainly develops delta facies, tidal flat facies and limited shallow sea equivalent sedimentary facies, and subdivides the delta plain. Delta front, pre delta, upper tidal zone, intertidal zone, subtidal zone, shelf sand ridge and shelf mud subfacies. Considering the influence factors of regional tectonic movement, paleogeomorphology and provenance supply in different periods of Pinghu period, a provenance-sedimentary model under the control of dustpan type fault and tidal action in Pinghu depression of Xihu sag was established, which laid a foundation for reservoir research.
【作者单位】：中国石油长城钻探工程有限公司解释研究中心;中国石油化工股份有限公司上海海洋油气分公司;中海石油(中国)有限公司上海分公司;浙江大学海洋学院;中国石油天然气管道局国际事业部;中国地质大学(北京)能源学院;
【基金】：国家重点基础研究发展计划“南海深水盆地油气资源形成与分布基础性研究”(编号:2009CB219407)资助
【分类号】：P618.13

【参考文献】