石油学报 ›› 2016, Vol. 37 ›› Issue (12): 1495-1507,1527.DOI: 10.7623/syxb201612005

• 地质勘探 • 上一篇    下一篇

东营凹陷页岩油储集空间成因及控制因素

张顺1,2, 刘惠民1, 宋国奇3, 王永诗1, 陈世悦4, 张守鹏1   

  1. 1. 中国石油化工股份有限公司胜利油田分公司勘探开发研究院 山东东营 257022;
    2. 中国石油化工集团公司胜利石油管理局博士后科研工作站 山东东营 257000;
    3. 中国石油化工股份有限公司胜利油田分公司 山东东营 257000;
    4. 中国石油大学地球科学与技术学院 山东青岛 266580
  • 收稿日期:2016-06-06 修回日期:2016-09-01 出版日期:2016-12-25 发布日期:2017-01-06
  • 通讯作者: 张顺,男,1985年8月生,2009年获中国石油大学(华东)学士学位,2015年获中国石油大学(华东)博士学位,现为中国石油化工股份有限公司胜利油田分公司勘探开发研究院博士后,主要从事沉积学与储层地质学研究。Email:satisfactoryshun@163.com
  • 作者简介:张顺,男,1985年8月生,2009年获中国石油大学(华东)学士学位,2015年获中国石油大学(华东)博士学位,现为中国石油化工股份有限公司胜利油田分公司勘探开发研究院博士后,主要从事沉积学与储层地质学研究。Email:satisfactoryshun@163.com
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2014CB239102)和国家自然科学基金项目(No.41372107,No.41572087)资助。

Genesis and control factors of shale oil reserving space in Dongying sag

Zhang Shun1,2, Liu Huimin1, Song Guoqi3, Wang Yongshi1, Chen Shiyue4, Zhang Shoupeng1   

  1. 1. Research Institute of Petroleum Exploration and Development, Sinopec Shengli Oilfield Company, Shandong Dongying 257022, China;
    2. Postdoctoral Scientific Research Working Station of Sinopec Shengli Oilfield Company, Shandong Dongying 257000, China;
    3. Sinopec Shenli Oilfield Company, Shandong Dongying 257000, China;
    4. School of Geosciences, China University of Petroleum, Shandong Qingdao 266580, China
  • Received:2016-06-06 Revised:2016-09-01 Online:2016-12-25 Published:2017-01-06

摘要:

断陷湖盆泥页岩储层储集空间类型多样,成因及受控因素均较为复杂。以渤海湾盆地东营凹陷古近系沙河街组三段下亚段—沙河街组四段上亚段泥页岩发育段为研究对象,通过X射线衍射全岩矿物分析、岩石薄片及扫描电镜观察分析技术,结合主、微量元素测试及有机地球化学测试数据,明确泥页岩储层基本特征;从储集空间类型识别及基本特征刻画入手,建立东营凹陷泥页岩储集空间成因分类方案;深入分析影响储集空间发育的关键地质作用机制。结果表明:1东营凹陷泥页岩架构矿物及岩石类型多样、储层非均质性极强、有机质丰度高(TOC普遍介于1.2%~6.7%)、成熟度较低(Ro值为0.51%~0.89%),孔隙度为2.9%~9.8%,垂直渗透率为0.0034~0.578 mD,孔隙结构复杂;2从成因及发育丰度的角度来看,黏土矿物絮凝成因孔、黏土矿物收缩缝、方解石重结晶晶间孔、白云石化晶间孔、有机质边缘收缩缝、碳酸盐岩溶蚀孔、生烃超压缝、层间微缝等是重要的储集空间类型;3沉积微相控制了孔隙架构矿物的组成、组构及平面分布,气候控制下的湖泊咸化程度影响了细粒物质的垂向叠置混合方式,进而控制了储集空间的类型及其组合;4不同咸化阶段的成岩流体性质、碳酸盐及黏土等自生矿物变化、有机质生烃演化控制了次生孔隙的形成与演化,方解石重结晶作用、黏土矿物的反应与转化、溶蚀作用及有机质生烃作用是控制储集空间发育的重要成岩作用类型。

关键词: 泥页岩储层, 储集空间成因, 方解石重结晶, 咸化湖盆, 成岩作用, 古近系, 东营凹陷

Abstract:

The reserving spaces of mud shale reservoirs in faulted lake basin are diversified, of which the genesis and control factors are relatively complicated. A study was conducted on the mud-shale development horizons of Lower Sub-member 3-Upper Sub-member 4 in Paleogene Shahejie Formation, Dongying sag, Bohai Bay Basin. By means of X-ray diffraction whole-rock mineral analysis, rock thin section and scanning electron microscopy technologies, as well as major trace element test and organic geochemical test data, the basic characteristics of mud shale reservoirs were confirmed. Based on the identification of reserving space types and basic characteristic descriptions, the genetic classification scheme of reserving space in mud shale of Dongying sag was established; the critical geological mechanism affecting the development of reserving space was also deeply analyzed. The research results show that:(1) the mud shale of Dongying sag is characterized by diversified architecture minerals and rock types, extremely strong reservoir heterogeneity, high abundance of organic matter (TOC is mainly ranged between 1.2% and 6.7%), low maturity (Ro value is dominantly in the range of 0.51% -0.89%), the porosity of 2.9% -9.8%, vertical permeability of 0.003 40-0.578 mD and complex pore structure; (2) in terms of genesis and development abundance, the important reserving space types include clay-mineral flocculent pores, clay-mineral contraction fractures, intergranular pores in recrystallized calcite, dolomitized intergranular pores, organic-matter contraction micro fissures, carbonate dissolution pores, abnormal high pressure fissures and inter-layer micro fractures; (3) sedimentary microfacies plays a control role in the component, composition fabric and plane distribution of pore framework mineral, and the lake salinization degree influenced by climate makes an impact on the vertical superimposed mixture mode of fine grains, so as to further control the types and assemblages of reserving space; (4) in different salinization stages, the formation and evolution of secondary pores are controlled by the diagenetic fluid properties, changes of authigenic minerals such as carbonate and clay, as well as organic-matter hydrocarbon generation and evolution. Calcite recrystallization, clay mineral reaction and transformation, dissolution and organic-matter hydrocarbon generation function are important diagenesis types controlling the development of reserving space.

Key words: shale oil reservoir, reserving space genesis, calcite recrystallization, salinization lake basin, diagenesis, Paleogene, Dongying sag

中图分类号: