石油与天然气地质 ›› 2013, Vol. 34 ›› Issue (6): 751-757.doi: 10.11743/ogg20130606

• 层序与储层 • 上一篇    下一篇

张家垛油田阜三段Ⅲ砂组沉积微相特征与沉积模式

陈倩倩1, 丁晓琪1,2, 万友利1, 张哨楠1,2   

  1. 1. 成都理工大学 能源学院, 四川 成都 610059;
    2. 西南石油大学 油气藏地质及开发工程国家重点实验室, 四川 成都 610500
  • 收稿日期:2012-12-31 修回日期:2013-10-10 出版日期:2013-12-08 发布日期:2014-01-04
  • 第一作者简介:陈倩倩(1988- ),女,硕士研究生,储层岩石学与储层地球化学。E-mail:491096496@qq.com。
  • 基金项目:
    中国博士后基金项目(2011M511941);自然科学青年基金项目(41302115)。

Microfacies characteristics and sedimentary models of the third member of Funing Formation in Zhangjiaduo oilfield

Chen Qianqian1, Ding Xiaoqi1,2, Wan Youli1, Zhang Shaonan1,2   

  1. 1. Energy College, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2012-12-31 Revised:2013-10-10 Online:2013-12-08 Published:2014-01-04

摘要: 苏北盆地张家垛油田阜宁组三段发育4种岩相:黑色泥岩相,生物扰动粉砂岩相、泥质纹层+生物钻孔粉-细砂岩相及平行层理细砂岩相。剖面结构主要为向上变粗的反韵律,其次是向上变粗复变细的复合韵律,几乎不见正韵律。根据岩石相、剖面结构、测井相及粒度累计曲线,认为阜宁组三段为浅湖滩坝沉积。根据沉积特征和砂体展布规律,将储层进一步划分为坝砂和滩砂,并提出该地区的滩坝沉积模式。坝砂由于泥质含量低、储层物性好,油气充满度高;而滩砂泥质纹层理发育,非均质性弱。由于主要充填在平行层理细砂岩相和泥质纹层+生物钻孔粉砂岩相中,充注程度差别大。

关键词: 浅湖, 滩坝, 沉积微相, 沉积模式, 阜宁组, 张家垛油田, 苏北盆地

Abstract: Four types of lithofacies are identified in the 3rd member of Funing Formation in Zhangjiaduo oilfield,the Su-bei Basin,including dark mudstone,bioturbated siltstone,siltstone-fine sandstone lithofacies with argillaceous laminates and burrow as well as fine sandstone with parallel bedding.Upward-coarsening reverse rhythm is the main section structure,followed by first upward-coarsening and then upward-thinning composite rhythm,while positive rhythm is very rare.All the features of lithofacies,section structure,logging facies and cumulative grading curve show that the 3rd member of Funing Fm is typical shallow lake beach-bar facies.According to the sedimentary characteristics and spatial distributions,the reservoirs are further divided into sandstone of bar microfacies and sandstone of beach microfacies.A beach-bar sedimentary model is proposed.The sandstone reservoirs of bar microfacies are high in hydrocarbon fullness,due to its low shale content and high porosity.In contrast,the sandstone reservoirs of beach microfacies show great variance in hydrocarbon fullness as argillaceous laminations are well developed,heterogeneity is week,and hydrocarbons mainly fill in the fine sandstone lithofacies with parallel bedding and argillaceous laminates+burrow fine sandstone lithofacies.

Key words: shallow lacustrine, beach-bar, sedimentary microfacies, sedimentary model, Funing Formation, Zhangjiaduo oilfield, Subei Basin

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