沉积物重力流流体转化沉积—混合事件层

发布时间：2018-06-21 20:28

本文选题：混合事件层 + 流体转化　；参考：《沉积学报》2016年06期

【摘要】：随着浊流和碎屑流理论体系日臻成熟,重力流的流体转化过程逐渐受到重视,而与其相关联的混合事件层概念也应运而生。混合事件层是单次碎屑流或浊流流体转化中的沉积记录,是多种流变学特征的垂向沉积组合。典型混合事件层沉积序列具有五段式的特征(即纯净砂岩段H_1、条带状砂岩段H_2、黏性碎积岩段H_3、波状层理段H_4、块状泥岩段H_5),其内部通常存在岩性突变界面。混合事件层发育于粗粒三角洲内部、海底扇和水道与舌状体过渡区、舌状体侧缘、远端及限制性的微型盆地边缘地区,其垂向叠置厚度可达数十米。混合事件层的发现对重力流流体转化、重力流沉积物空间流变学性质研究具有重要意义,同时也推动了油气储层构型和非均质性研究,为进一步寻找深水有利储集砂体提供了新思路。混合层地球物理识别方法的建立及其相关概念在湖泊重力流研究中的灵活应用将是下一步的研究方向。
[Abstract]:As the theoretical system of turbidity flow and clastic flow becomes more and more mature, the fluid transformation process of gravity flow is paid more and more attention, and the concept of mixed event layer associated with it comes into being. The mixed event layer is a sedimentary record of single clastic flow or turbidite flow transformation and is a vertical sedimentary combination of rheological characteristics. The typical mixed event layer sedimentary sequence is characterized by five sections (i.e. pure sandstone segment H _ 1, banded sandstone section H _ 2, viscous shredded rock segment H _ 3, wave bedding section H _ 4, massive mudstone section H _ 5T), and there is usually a lithologic abrupt interface inside the section. The mixed event layer is developed within the coarse grain delta, the transitional zone between submarine fan and waterway and tongue body, the lateral margin of tongue body, the distal end and the restricted marginal area of micro-basin, and its vertical overlay thickness can reach tens of meters. The discovery of mixed event layers is of great significance to the study of the spatial rheological properties of gravity fluid and gravity flow sediments, and also promotes the study of reservoir configuration and heterogeneity. It provides a new idea for further exploration of favorable reservoir sand bodies in deep water. The establishment of hybrid geophysical identification method and the flexible application of related concepts in the study of lake gravity flow will be the next research direction.
【作者单位】：中国石油大学(北京)地球科学学院;中国石油大学(北京)油气资源与探测国家重点实验室;中海油研究总院;
【基金】：国家科技重大专项(2016ZX05001002-006)~~
【分类号】：P512.2;P618.13

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