石油与天然气地质 ›› 2005, Vol. 26 ›› Issue (6): 808-815.doi: 10.11743/ogg20050621

• 论文 • 上一篇    下一篇

阿克库勒凸起东河砂岩的沉积相与层序地层

郭建华1, 朱美衡1, 刘辰生1, 石媛媛2   

  1. 1. 中南大学地学与环境工程学院,湖南长沙,410083;
    2. 中国石化西北分公司勘探开发研究院,新疆乌鲁木齐,830011
  • 收稿日期:2005-09-14 出版日期:2005-12-25 发布日期:2012-01-16
  • 基金项目:

    湖北省教育厅自然科学基金资助项目(2000A51007);中国石油与天然气总公司中青年创新基金资助项目(99-07)

Sedimentary facies and sequence stratigraphy of Donghe Sandstone in Akekule Uplift

Guo Jianhua1, Zhu Meiheng1, Liu Chensheng1, Shi Yuanyuan2   

  1. 1. South-Central University, Changsha, Hunan;
    2. Petroleum Exploration and Development Research Institute, Northwest Branch Company, SINOPEC, Urumqi, Xinjiang
  • Received:2005-09-14 Online:2005-12-25 Published:2012-01-16

摘要:

阿克库勒地区东河砂岩包括了含泥砾砂岩、分选好的中-细粒砂岩、粉砂岩及泥岩,是一个具有完整海侵-海退旋回的标准层序,顶、底分别为两个不整合面所限,为Ⅰ型层序边界。东河砂岩自下而上明显地分为低位体系域、海侵体系域与高位体系域。由于低位体系域是陆上河流的充填沉积,因此,盆地内低位体系域不发育,分布局限。海侵体系域主要为受潮汐控制的滨岸沉积,由一系列向上变浅和变细的副层序堆积成退积的副层序组,副层序由下部的潮下砂坝向上逐渐变化为潮间砂坪、砂泥混合坪及泥坪。高位体系域主要分布于东河砂岩的上段,由于东河砂岩的不断沉积,在达到最大海泛面之后,滨岸带海水循环畅通,形成了以波浪作用为主的浪控滨岸沉积体系,主要是以分选好的灰白色中-细粒砂岩为特征,构成了特色十分鲜明的“东河砂岩”。

关键词: 沉积相, 潮控滨岸, 浪控滨岸, 层序地层, 东河砂岩, 塔里木盆地

Abstract:

Donghe sandstone in Akekule,composed of mud-pebbly sandstone,well sorted(medium-to)fine-grained sandstones,siltstone and mudstone,is a normal sequence with a complete transgressive-regressive cycle,the top and bottom of which are defined by unconformities,i.e.,type Ⅰsequence boundaries.Donghe sandstone can evidently be divided,from bottom to top,into lowstand system tract,transgressive system tract and highstand system tract.As the lowstand system tract is subaerial fluvial deposit,it is underdeveloped in the basin with limited distribution.The transgressive system tract is mainly composed of shore deposit controlled by tide.A series of shallowing and fining upward parasequences constitute the retrograding parasequence group.The parasequences gradually change upward from subtidal sandbar in the lower part to intertidal sand flat,mixed sand and mud flat,and mud flat.The highstand system tract is mainly distributed in the upper Donghe sandstone.Duing the continuous deposition of Donghe sandstone, the inshore sea water circulated smoothly and(unimpededly)after the largest marine flooding surface was reached,leading to the formation of wave-controlled shore deposition system with wave action as the main geologic agent,which is mainly characterized by grayish white(medium-to)fine-grained sandstone. They constitute the characteristic "Donghe sandstone".

Key words: sedimentary facies, tide-controlled shore, wave controlled shore, sequence stratigraphy, Donghe sandstone, Tarim basin

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