老君庙油田古近系M油组冲积扇沉积特征  

Alluvial fan sedimentary characteristics of M oil group,Paleogene,Laojunmiao oilfield

作　　者：王旭影[1,2] 姜在兴[1] 岳大力[2] 喻宸[2] 徐婷[3] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国石油大学(北京)地球科学学院,北京102249 [3]河南油田分公司第二采油厂,河南南阳473400

出　　处：《东北石油大学学报》2017年第2期1-12,共12页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2011ZX05009-002)

摘　　要：根据测井、岩心及分析化验资料,在等时地层格架基础上,结合老君庙油田古近系M油组区域沉积背景、岩石学、重矿物、粒度分析、沉积构造及砂体形态等,分析冲积扇识别标志,研究沉积相、沉积微相类型,刻画沉积微相展布规律,建立老君庙油田M油组冲积扇沉积模式。结果表明:M油组具备干旱气候条件下冲积扇沉积特征,主要发育冲积扇扇根外缘和扇中,扇根外缘发育片流带和漫洪带,扇中发育辫流带和漫流带。沉积微相平面分布样式一种为扇根外缘连片的片流带和离散的漫洪带拼接样式(M_3砂组),另一种为条带状辫流水道和透镜状漫流带相间拼接样式(M_2和M_1砂组)。整个M油组自下而上表现为冲积扇不断退积。研究区沉积相主要受控于构造运动、气候条件和古地形。Based on the abundant logging,core,analytical laboratory data and also based on the isochronous stratigraphic framework,combined with the regional sedimentary background,petrology,heavy minerals,particle size analysis,sedimentary structures and sand body morphology,this paper analyzes the alluvial fan facies identification,types of sedimentary facies and sedimentary microfacies,establishing the alluvial fan sedimentary model of M oil group Laojunmiao oilfield.The research shows that the M oil group is dominated by the alluvial fan deposits under the arid climatic conditions.The alluvial fan is dominated by the outer edge of the inner fan and the middle fan.The outer edge of the inner fan consists of sheet-flood belt and over-bank belt.The middle fan consists of braided stream belt and overbank belt.Plane distribution pattern of microfacies can be summarized into two types:Platy-connective sheetflood belt and discrete overbank belt in the inner fan(M3);stripped braided-stream belt and lenticular overbank belt in the middle fan(M_2 and M_1).From the bottom to the top,it is a constant retrograding sedimentary sequence.Sedimentary facies of the region is mainly controlled by tectonic movements,climatic conditions and palaeotopography.

关 键 词：老君庙油田 M油组 冲积扇 沉积特征 等时地层格架 

分 类 号：TE122.[石油与天然气工程—油气勘探]