等深流沉积:物理海洋学、过程沉积学和石油地质学

发布时间：2018-01-24 12:45

本文关键词： 底流等深流沉积储集层加的斯湾佛罗里达海流牵引构造过程沉积学　出处：《石油勘探与开发》2017年02期 　论文类型：期刊论文

【摘要】：主要阐述与等深流沉积以及其他底流沉积相关的基本原理。深海底流分为温盐引起的自转型等深流、风力驱动底流、潮汐驱动底流(大多在海底峡谷)、内波/内潮汐驱动的斜压流4种基本类型,均常见牵引构造。等深流沉积是温盐引起的自转型等深流沉积体,粒级可为泥级或细砂级,含硅质或钙质碎屑。在古代等深流与其他等深流的区分方面,目前尚无沉积学或地震学诊断标准。在岩心和露头上,双黏土层是识别深海潮汐沉积的可靠指标。加的斯湾虽然是泥质等深流沉积相模式的代表,但并无真正的等深流沉积,仅受与地中海流出水(MOW)有关的短暂等深流影响,并受内波和内潮汐、浊流、海啸、飓风、泥火山、煤成气渗漏、沉积物供给、孔隙水排出和海底地形等其他复杂因素的影响。在加的斯湾综合大洋钻探(IODP)339项目岩心中没有发现能用于解释沉积过程的原生沉积构造,因此等深流沉积相模式应予废弃。4类底流改造砂体均具备成为油气储集层的潜力。在佛罗里达海峡大巴哈马浅滩(Great Bahama Bank)附近的等深流沉积,因为其中的泥质成分被强烈的等深流从粒间原生孔隙中簸选出来,最大测量孔隙度为40%,最大渗透率达9 881×10~(-3)μm~2。现代等深流的实证数据也显示其具有发育盖层和烃源岩的潜力。因此,未来石油勘探与开发应重点关注这些经常被忽视的深海硅质和钙质碎屑等深流沉积储集层。
[Abstract]:This paper mainly describes the basic principles related to isothermal current deposition and other bottom-flow deposits. Deep seabed flows are divided into self-transformed iso-deep currents caused by temperature and salt, wind driven bottom currents and tidal driven bottom currents (mostly in submarine canyons). There are four basic types of baroclinic flow driven by internal wave / internal tide, all of which are common traction structures. Isochron deposition is a self-transformed isobaric sedimentary body caused by temperature and salt, and the grain level can be mud or fine sand. Siliceous or calcareous clastic. There are no sedimentological or seismological diagnostic criteria for the distinction between the ancient isobaric and other isochymal flows in cores and outcrops. The double clay layer is a reliable index to identify the deep-sea tidal deposits. Although the Cadiz Bay is the representative of the muddy and other deep-current sedimentary facies model, there is no real isoprofundity deposition. It is affected only by the transient isoprofundity associated with the Mediterranean outflow of water (mow), and by internal waves and internal tides, turbidity currents, tsunamis, hurricanes, mud volcanoes, coal-formed gas seeps, sediment supplies. The influence of other complex factors such as pore water discharge and submarine topography. No primary sedimentary structure can be found in the core of the IODPN339 project of integrated ocean drilling in the Gulf of Cadiz to explain the sedimentary process. Therefore, the iso-deep flow sedimentary facies model should be abandoned. 4 class bottom flow remolding sand bodies have the potential to become oil and gas reservoirs. Great Bahama Bank in the Grand Bahamian Shoal of the Florida Strait. The isobaric deposition nearby. Because the muddy components were picked out of the intergranular primary pores by a strong isodyne current, the maximum measured porosity was 40%. The maximum permeability is 9 881 脳 10 ~ (-1) 渭 m ~ (-3) 渭 m ~ (-2). The data of modern isothermal flow also show that it has the potential of developing caprock and source rock. In the future oil exploration and development should focus on these often neglected deep-sea siliceous and calcareous detritus and other deep-current sedimentary reservoirs.
【作者单位】： Department
【分类号】：P618.13;P512.2
【正文快照】： 1研究背景及思路一直以来,深海底流及其沉积领域(见图1)对物理海洋学和过程沉积学研究具有重大的贡献,过去42年中,Shanmugam对深海沉积各个方面(包括底流)进行了研究探讨。与顺坡沉积过程不同,等深流平行于区域斜坡,砂体展布和储集层发育均受其影响。因此,等深流沉积研究

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