老君庙油田古近系M油组冲积扇沉积特征

发布时间：2018-06-29 23:30

本文选题：老君庙油田 + M油组　；参考：《东北石油大学学报》2017年02期

【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。
[Abstract]:According to logging, core and analytical data, on the basis of isochronous stratigraphic framework, combined with regional sedimentary background, petrology, heavy minerals, grain size analysis, sedimentary structure and sand body morphology of Paleogene M oil formation in Laojunmiao Oilfield, etc. This paper analyzes the identification criteria of alluvial fans, studies sedimentary facies and sedimentary microfacies types, depicts the distribution of sedimentary microfacies, and establishes the alluvial fan sedimentary model of M oil formation in Laojunmiao Oilfield. The results show that the sedimentary characteristics of alluvial fan in the Wei M oil formation are characterized by arid climate conditions. The alluvial fan is mainly developed in the outer and middle of the root of the alluvial fan, in the outer edge of the fan root, in the sheet flow zone and flood zone, and in the fan in which the braided flow zone and the diffuse flow zone are developed. The planar distribution pattern of sedimentary microfacies is a splicing pattern of flake flow zone and discrete flood zone (M _ 3 sand formation) and a splicing pattern between strip braided channel and lenticular diffuse flow zone (M _ 2 and M _ S _ 1 sand formation). From bottom to top, the whole M oil group shows continuous retrogression of alluvial fan. Sedimentary facies in the study area are mainly controlled by tectonic movement, climatic conditions and paleotopography.
【作者单位】：中国地质大学(北京)能源学院;中国石油大学(北京)地球科学学院;河南油田分公司第二采油厂;
【基金】：国家科技重大专项(2011ZX05009-002)
【分类号】：P618.13

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