岩性油气藏 ›› 2022, Vol. 34 ›› Issue (3): 70–81.doi: 10.12108/yxyqc.20220307

• 地质勘探 • 上一篇    下一篇

黄骅坳陷南堡凹陷古近系沙一段页岩油储层特征及油气意义

程丹华1,2, 焦霞蓉1, 王建伟2, 庄东志2, 王政军2, 江山1   

  1. 1. 长江大学 地球科学学院, 武汉 430100;
    2. 中国石油冀东油田 勘探开发研究院, 河北 唐山 063004
  • 收稿日期:2022-01-25 修回日期:2022-03-11 出版日期:2022-05-01 发布日期:2022-05-12
  • 通讯作者: 焦霞蓉(1983-),女,长江大学在读博士研究生,研究方向为油气成藏规律及储层特征。Email:jiaoxia20001@163.com。
  • 作者简介:程丹华(1983-),男,工程师,主要从事地质勘探方面的研究工作。地址:(063004)河北省唐山市路北区新华西道光明西里51号中国石油冀东油田勘探开发研究院。Email:chengdanhua@petrochina.com.cn
  • 基金资助:
    ：国家科技重大专项“大型油气田和煤层气开发”下属专题“我国含油气盆地深层油气分布规律与资源评价”（编号：2017ZX05008006-002-006）资助

Shale oil reservoir characteristics and significance of the first member of Paleogene Shahejie Formation in Nanpu Sag，Huanghua Depression

CHENG Danhua1,2, JIAO Xiarong1, WANG Jianwei2, ZHUANG Dongzhi2, WANG Zhengjun2, JIANG Shan1   

  1. 1. School of Geosciences, Yangtze University, Wuhan 430100, China;
    2. Research Institute of Exploration and Development, PetroChina Jidong Oilfield Company, Tangshan 063004, Hebei, China
  • Received:2022-01-25 Revised:2022-03-11 Online:2022-05-01 Published:2022-05-12

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摘要： 南堡凹陷古近系沙一段页岩油藏为黄骅坳陷南堡凹陷未来勘探的重点领域。利用岩心及薄片观察、扫描电镜、核磁共振、X射线衍射等多种分析测试手段，研究了南堡凹陷沙一段页岩储层的岩石学特征、储集空间类型及孔隙结构特征。研究结果表明：①研究区页岩发育灰暗相间水平纹层长英质页岩、深灰色块状混合质页岩、灰色粒序纹层混合质页岩、黑灰色水平纹层混合质页岩等4种岩相，页岩油主要储集在深灰色块状混合质页岩、灰色粒序纹层混合质页岩、黑灰色水平纹层混合质页岩中。②黑灰色水平纹层混合质页岩的裂缝最为发育，孔隙度最大；灰色粒序纹层混合质页岩比深灰色块状混合质页岩孔隙度大，但深灰色块状混合质页岩比灰色粒序纹层混合质页岩裂缝发育；储集空间包括裂缝、残余粒间孔、矿物晶间孔及溶蚀孔，孔喉特征主要为大孔微细喉，孔隙半径为125.369～156.048 μm，平均为133.209 μm，喉道半径为0.377～0.860 μm，平均为0.622 μm。③南堡凹陷沙一段混合质页岩厚度大、含油性好、裂缝发育、储集性能好，具有良好的页岩油形成条件，具有较大的页岩油勘探潜力。

关键词: 页岩油藏, 储层特征, 孔隙结构, 沙一段, 古近系, 南堡凹陷, 黄骅坳陷

Abstract: The shale oil reservoir of the first member of Paleogene Shahejie Formation（Es1）is the focus of future exploration in the Nanpu Sag of Huanghua Depression. The petrological characteristics，reservoir space types and pore structure characteristics of shale reservoir of Es1 in Nanpu Sag were studied by means of core and thin section observation，scanning electron microscope，nuclear magnetic resonance and X-ray diffraction. The results show that： （1）Four lithofacies are developed in the shale of this area，including gray and dark alternating horizontal laminar felsic shale，dark gray massive mixed shale，gray graded laminated mixed shale，black gray horizontal laminar mixed shale. Shale oil is mainly stored in dark gray massive mixed shale，gray graded laminated mixed shale，black gray horizontal laminar mixed shale.（2）The black gray horizontal laminar mixed shale has the most developed fractures and the largest porosity，and the gray graded laminated mixed shale has higher porosity and less fractures than the dark gray massive mixed shale. The reservoir space includes fractures，residual intergranular pores，mineral intercrystalline pores and dissolved pores. The pore throat is characterized by large pores and tiny throats，the pore radius ranges from 125.369 μm to 156.048 μm with an average of 133.209 μm，and the throat radius ranges from 0.377 μm to 0.860 μm，with an average of 0.622 μm.（3）The mixed shale of Es1 in Nanpu Sag has a large thickness，good oil-bearing properties，developed fractures and good reservoir performance. It has good shale oil formation conditions and great shale oil exploration potential.

Key words: shale reservoir, reservoir characteristics, pore structures, the first member of Shahejie Formation, Paleogene, Nanpu Sag, Huanghua Depression

中图分类号: 

  • TE122.3
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