石油勘探与开发 >

2016 , Vol. 43 >Issue 2: 198 - 208

DOI: https://doi.org/10.11698/PED.2016.02.05

油气勘探

渤海湾盆地东营凹陷古近系细粒沉积岩岩相类型及储集层特征

  • 陈世悦 ,
  • 张顺 ,
  • 王永诗 ,
  • 谭明友
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  • 1. 中国石油大学（华东）地球科学与技术学院；
    2. 中国石化胜利油田勘探开发研究院；
    3. 中国石化胜利油田物探研究院
陈世悦（1963-）,男,陕西山阳人,博士,中国石油大学（华东）教授,主要从事沉积学方面的教学与研究工作。地址：山东青岛经济技术开发区长江西路66号,中国石油大学（华东）地球科学与技术学院,邮政编码：266580。E-mail: chenshiyue@vip.sina.com

网络出版日期: 2017-01-01

基金资助

国家自然科学基金项目（41372107）

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Lithofacies types and reservoirs of Paleogene fine-grained sedimentary rocks in Dongying Sag, Bohai Bay Basin

  • CHEN Shiyue ,
  • ZHANG Shun ,
  • WANG Yongshi ,
  • TAN Mingyou
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  • 1. College of Geo-Resources and Information, China University of Petroleum, Qingdao 266555, China;
    2. Geological Scientific Research Institute, Sinopec Shengli Oilfield Company, Dongying 257015, China;
    3. Geophysical Research Institute of Sinopec Shengli Oilfield, Dongying 257022, China

Online published: 2017-01-01

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摘要

通过岩心精细观察描述、薄片鉴定、X射线衍射分析、扫描电镜分析等技术,建立了东营凹陷古近系细粒沉积岩岩相划分方案,明确了主要岩相类型的储集空间类型及特征,并对主要岩相的孔隙微观结构特征进行了分析。结果表明：①富有机质纹层状灰岩相孔隙结构极为复杂,孔径具有多尺度性,微裂缝的存在沟通了孔隙,增大了储集层的孔渗性能;②中有机质纹层状灰质细粒混合沉积岩相孔隙多尺度性特征不显著,介孔开放性较好,大孔开放性较差,孔缝连通性一般;③富有机质夹层状灰岩相储集空间类型多样,孔径的多尺度性较强,孔隙的连通性较好,孔缝沟通明显,方解石重结晶晶间孔缝成为大孔的最主要部分;④贫有机质块状灰质细粒混合沉积岩储集空间类型较单一,裂缝欠发育,孔隙连通性较差。综合油气生成潜力、油气可流动性、油气储集性能、可压裂性等因素,预测富有机质纹层状灰岩、富有机质灰质纹层状细粒混合沉积岩为有利岩相类型。图7表1参29

关键词： 细粒沉积岩; 岩相划分; 有利岩相; 储集空间; 孔隙结构; 东营凹陷; 古近系

本文引用格式

陈世悦 , 张顺 , 王永诗 , 谭明友 . 渤海湾盆地东营凹陷古近系细粒沉积岩岩相类型及储集层特征[J]. 石油勘探与开发, 2016 , 43(2) : 198 -208 . DOI: 10.11698/PED.2016.02.05

Abstract

By applying such technologies as detailed description of cores, identification of thin sections, X-ray diffraction analysis, and scanning electron microscopy, this paper establishes the lithofacies division scheme of the fine-grained sedimentary rocks in the Paleogene of the Dongying Sag, confirms the reservoir space types and characteristics of the major lithofacies, and analyzes the micro-structure characteristics of their pores. The research results show that: (1) the pore structure of the organic-rich laminated limestone facies is very complex, with multi-scale aperture. The micro-fractures connect the pores, and increase the porosity and permeability of reservoirs; (2) the pore structure of the laminated calcareous fine-grained mixed sedimentary facies with moderate organic content has not apparent multi-scale feature, but with better mesoporous opening property, poorer macroporous opening property, and ordinary connectivity of pores and fractures; (3) the reservoir space types of the organic-rich interbedded limestone facies are various, with stronger multi-scale aperture, better pore connectivity, apparent communication between pores and fractures, and the intercrystal pores and fractures in calcite recrystallization are the most important part of the macro-pores; (4) the reservoir space types of the organic-poor massive calcareous fine-grained mixed sedimentary facies are relatively simple, with undeveloped fractures, and poorer pore connectivity. By combining oil and gas generation potential, oil and gas flow ability, oil and gas reservoir properties and fracturing properties etc., the organic-rich laminated limestone and the organic-rich limy laminated fine-grained mixed sedimentary rocks are predicted as the favorable lithofacies.

Key words： fine-grained sedimentary rock; lithofacies division; favorable lithofacies; reservoir space; pore structure; Dongying Sag; Paleogene

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