重力流沉积机理模拟研究初探——以歧口凹陷沙一下亚段为例  

Preliminary Exploration for Simulation Study of Deposition Mechanism of Gravity Flow——Taking Lower Part of Shahejie Formation in Qikou Sag for Example

作　　者：苑伯超[1] 刘忠保[1] 何幼斌[1] 文沾[1] 罗进雄[1] 蒲秀刚[2] 陈长伟[2] 林常梅[2] 

机构地区：[1]长江大学地球科学学院,湖北荆州434023 [2]中石油大港油田分公司勘探开发研究院,天津300280

出　　处：《水利与建筑工程学报》2012年第1期4-11,共8页Journal of Water Resources and Architectural Engineering

基　　金：国家科技重大专项资助(2008ZX05007-002)

摘　　要：在对歧口凹陷古地貌、构造演化、沉积体系等地质条件调查研究的基础上,运用沉积模拟技术,再现了沙一下重力流的形成及演化过程,分析了重力流的搬运沉积特征与影响因素。实验表明,来水特征、湖水位、初始流速、沉积物浓度与泥砂含量、湖区底形、流态等对重力流沉积砂体形成及演化具有显著的影响。通过实际砂体与实验砂体厚度分布对比,滨海4以南、港深78、滨海28以北地区为上倾尖灭砂体有利储层分布区。Based on studying the paleogeomorphological features,tectonic evolution,depositional system of Qikou Sag,the formation and evolution of the sand bodies of gravity flow origin are reconstructed by using the technology of simulation experiment.The transportation and sedimentary characteristics and the influencing factors of gravity flow are also analyzed.The experiment results show that the inflow characteristics,lake level,initial flow velocity,sediment concentration and sediment content,lake bottom shape,flow patterns and so on have obvious influence for the formation and evolution of the sand bodies of gravity flow origin.By comparing the actual thickness and experimental thickness of the sand body,the region of the south of Binhai4 and the north of Gangshen78 and Binhai28 is the favourable region for reservoir development.

关 键 词：歧口凹陷 沉积模拟 重力流 上倾尖灭砂体 主控因素 

分 类 号：P512.2[天文地球—地质学]