孔店油田馆陶组辫状河—曲流河转换及其控制因素

发布时间：2018-01-25 22:24

本文关键词： 沉积特征河流类型主控因素演化模式　出处：《断块油气田》2017年06期 　论文类型：期刊论文

【摘要】：为探讨孔店油田馆陶组河流类型的转换模式,在沉积学的理论指导下,通过对研究区岩心及测井资料的详细描述,在河流成因岩相类型识别的基础上,确定了6种沉积微相类型,并且通过对馆陶组地层垂向沉积微相、河道堆叠样式和河道宽厚比等的变化特征分析,确定了研究区发育辫状河和曲流河2种类型的河流,并建立了研究区的沉积模式;在此基础上,对河型转换的控制因素进行了分析。研究表明:基准面变化、物源供给及古气候3个因素控制着孔店油田馆陶组河流类型的转换过程。受到基准面的逐渐升高、物源供给能力的减弱及古气候环境变的干热等因素的影响,馆陶组沉积逐渐由辫状河体系向曲流河转换,最终建立了研究区河型演化模式。
[Abstract]:In order to discuss the river type conversion model of Guantao formation in Kongdian Oilfield, under the guidance of sedimentology theory, the core and logging data of the study area are described in detail, and based on the identification of fluvial origin lithofacies type. Six types of sedimentary microfacies were determined, and the variation characteristics of vertical sedimentary microfacies, channel stacking style and width to thickness ratio of the Guantao formation were analyzed. Two types of rivers, braided river and meandering river, are identified in the study area, and the sedimentary model of the study area is established. On this basis, the control factors of river type conversion are analyzed, and the results show that the datum level changes. The three factors of material supply and paleoclimate control the river type conversion process of Guantao formation in Kongdian Oilfield, which is influenced by the increasing of datum level, the weakening of material supply capacity and the change of dry heat in paleoclimate environment. The deposition of Guantao formation was gradually transformed from braided stream system to meandering stream system, and the fluvial evolution model of the study area was finally established.
【作者单位】：中国石油大学(华东)地球科学与技术学院;
【基金】：国家自然科学基金项目“基于沉积过程分析的砂质辫状河储层中细粒沉积成因机制与分布模式研究”(41672129)
【分类号】：P618.13
【正文快照】： 0引言河流的形成是一个复杂过程,在时空上极具变化性,会表现出多种河型。河道形态受多种因素的控制,在外界因素发生变化的情况下,河型就可能发生转化,河型的转化会导致不同河段砂体的发育特征存在明显差异[1]。河型研究是判别地下不同成因砂体的关键,较为准确地判断河型并分析

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