Advanced Search
Volume 47 Issue 3
May  2025
Turn off MathJax
Article Contents
Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2025  >  47(3): 541-551
YOU Junjun, HU Desheng, YUAN Zhenzhu, ZHOU Gang, JIANG Li. Microscopic pore structure characteristics and mobility of shale oil reservoirs in Liushagang Formation, Weixinan Sag, Beibu Gulf Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2025, 47(3): 541-551. doi: 10.11781/sysydz2025030541
Citation: YOU Junjun, HU Desheng, YUAN Zhenzhu, ZHOU Gang, JIANG Li. Microscopic pore structure characteristics and mobility of shale oil reservoirs in Liushagang Formation, Weixinan Sag, Beibu Gulf Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2025, 47(3): 541-551. doi: 10.11781/sysydz2025030541
shu

Microscopic pore structure characteristics and mobility of shale oil reservoirs in Liushagang Formation, Weixinan Sag, Beibu Gulf Basin

doi: 10.11781/sysydz2025030541

  • Western South China Sea Petroleum Research Institute, Zhanjiang Branch, CNOOC, Zhanjiang, Guangdong 524057, China

  • Received Date: 2024-02-22
  • Rev Recd Date: 2025-04-11
  • Publish Date: 2025-05-28
    Abstract
  • Shale oil reservoirs are characterized by tightness and strong heterogeneity, and the microscopic pore structures affect the storage and flow of shale oil in reservoirs. However, conventional single analytical methods often fail to accurately characterize these microscopic pore structures. This study aims to reveal the microscopic pore structure and mobility characteristics of shale oil reservoirs, thereby guiding efficient exploration and development of offshore shale oil. Three types of shale oil reservoirs—matrix-type, laminated-type and interbedded-type—in the Liushagang Formation, Weixinan Sag, Beibu Gulf Basin were selected as the research objects. Integrated analytical and testing methods were employed, including cast thin-sections, scanning electron microscopy, high-pressure mercury intrusion, nitrogen adsorption, and nuclear magnetic resonance, to analyze pore structure parameters, mercury intrusion morphology, and adsorption curve characteristics. The results showed that the matrix-type and laminated-type reservoirs exhibited finer grain sizes and relatively underdeveloped pores, dominated by slit-shaped pore morphologies. These reservoirs commonly featured bedding fractures, organic pores, interlayer pores within clay minerals, and intercrystalline pores within pyrite. The interbedded-type reservoirs mainly had ink-bottle-shaped pore morphologies, along with intergranular pores within mineral particles, dissolution pores, and fracture networks, showing good pore size distribution and reservoir connectivity. Analysis of shale oil mobility through fluorescence thin sections and nuclear magnetic resonance revealed that the matrix-type and laminated-type reservoirs exhibited relatively poorer mobility, with movable porosities of 0.72% and 4.62%, respectively, along with lower movable oil content. The interbedded-type reservoir exhibited a movable porosity of 6.37%, with lighter hydrocarbon components, better mobility, and higher movable oil content, making it the most favorable reservoir type for shale oil exploration in the Weixinan Sag.

     

    • All authors declare no relevant conflict of interests.
    YOU Junjun proposed the research concept and wrote the paper's abstract and introduction. HU Desheng was responsible for writing the regional geological overview and reservoir development characteristics. YUAN Zhenzhu contributed to the writing of mobility development characteristics and conclusion. ZHOU Gang handled data compilation. JIANG Li was responsible for figure preparation. All authors have read the final version of the paper and consented to its submission.
    FullText(HTML)
  • loading
    • References(29)
  • [1]
    邹才能, 潘松圻, 荆振华, 等. 页岩油气革命及影响[J]. 石油学报, 2020, 41(1): 1-12. doi: 10.3969/j.issn.1001-8719.2020.01.001

    ZOU Caineng, PAN Songqi, JING Zhenhua, et al. Shale oil and gas revolution and its impact[J]. Acta Petrolei Sinica, 2020, 41(1): 1-12. doi: 10.3969/j.issn.1001-8719.2020.01.001
    [2]
    邹才能, 杨智, 崔景伟, 等. 页岩油形成机制、地质特征及发展对策[J]. 石油勘探与开发, 2013, 40(1): 14-26.

    ZOU Caineng, YANG Zhi, CUI Jingwei, et al. Formation mechanism, geological characteristics and development strategy of nonmarine shale oil in China[J]. Petroleum Exploration and Development, 2013, 40(1): 14-26.
    [3]
    马永生, 蔡勋育, 赵培荣, 等. 中国陆相页岩油地质特征与勘探实践[J]. 地质学报, 2022, 96(1): 155-171. doi: 10.3969/j.issn.0001-5717.2022.01.013

    MA Yongsheng, CAI Xunyu, ZHAO Peirong, et al. Geological characteristics and exploration practices of continental shale oil in China[J]. Acta Geologica Sinica, 2022, 96(1): 155-171. doi: 10.3969/j.issn.0001-5717.2022.01.013
    [4]
    何文渊, 蒙启安, 张金友. 松辽盆地古龙页岩油富集主控因素及分类评价[J]. 大庆石油地质与开发, 2021, 40(5): 1-12.

    HE Wenyuan, MENG Qi'an, ZHANG Jinyou. Controlling factors and their classification-evaluation of Gulong shale oil enrichment in Songliao Basin[J]. Petroleum Geology & Oilfield Development in Daqing, 2021, 40(5): 1-12.
    [5]
    刘伟新, 史志华, 朱樱, 等. 扫描电镜/能谱分析在油气勘探开发中的应用[J]. 石油实验地质, 2001, 23(3): 341-343. doi: 10.3969/j.issn.1001-6112.2001.03.017

    LIU Weixin, SHI Zhihua, ZHU Ying, et al. Application of SEM/EDX analysis in petroleum exploration and production[J]. Petroleum Geology & Experiment, 2001, 23(3): 341-343. doi: 10.3969/j.issn.1001-6112.2001.03.017
    [6]
    崔景伟, 邹才能, 朱如凯, 等. 页岩孔隙研究新进展[J]. 地球科学进展, 2012, 27(12): 1319-1325.

    CUI Jingwei, ZOU Caineng, ZHU Rukai, et al. New advances in shale porosity research[J]. Advances in Earth Science, 2012, 27(12): 1319-1325.
    [7]
    杜金虎, 胡素云, 庞正炼, 等. 中国陆相页岩油类型、潜力及前景[J]. 中国石油勘探, 2019, 24(5): 560-568. doi: 10.3969/j.issn.1672-7703.2019.05.003

    DU Jinhu, HU Suyun, PANG Zhenglian, et al. The types, potentials and prospects of continental shale oil in China[J]. China Petroleum Exploration, 2019, 24(5): 560-568. doi: 10.3969/j.issn.1672-7703.2019.05.003
    [8]
    王倩茹, 陶士振, 关平. 中国陆相盆地页岩油研究及勘探开发进展[J]. 天然气地球科学, 2020, 31(3): 417-427.

    WANG Qianru, TAO Shizhen, GUAN Ping. Progress in research and exploration & development of shale oil in continental basins in China[J]. Natural Gas Geoscience, 2020, 31(3): 417-427.
    [9]
    徐长贵, 邓勇, 范彩伟, 等. 北部湾盆地涠西南凹陷页岩油地质特征与资源潜力[J]. 中国海上油气, 2022, 34(5): 1-12.

    XU Changgui, DENG Yong, FAN Caiwei, et al. Geological characteristics and resource potential of shale oil in Weixinan Sag of Beibu Gulf Basin[J]. China Offshore Oil and Gas, 2022, 34(5): 1-12.
    [10]
    孙殿强, 姜洪丰, 周刚. 我国海上首口页岩油探井压裂测试成功并获商业油流: 海上页岩油开启新纪元[J]. 中国石油石化, 2022(18): 50-51. doi: 10.3969/j.issn.1671-7708.2022.18.017

    SUN Dianqiang, JIANG Hongfeng, ZHOU Gang. China's first offshore shale oil exploration well successfully fractured and obtained commercial oil flow—opening a new era for offshore shale oil[J]. China Petrochem, 2022(18): 50-51. doi: 10.3969/j.issn.1671-7708.2022.18.017
    [11]
    徐新德, 王碧维, 李旭红, 等. 北部湾盆地涠西南凹陷流沙港组隐蔽油气藏油源及成藏特征[J]. 天然气地球科学, 2012, 23(1): 92-98.

    XU Xinde, WANG Biwei, LI Xuhong, et al. Oil sources of concealed reservoirs in Liushagang Formation of the Weixinan Sag and accumulation feature, Beibuwan Basin[J]. Natural Gas Geoscience, 2012, 23(1): 92-98.
    [12]
    杨希冰, 胡林, 金秋月. 乌石凹陷中—东区油气来源及成藏时间分析[J]. 东北石油大学学报, 2016, 40(5): 9-17. doi: 10.3969/j.issn.2095-4107.2016.05.002

    YANG Xibing, HU Lin, JIN Qiuyue. Analysis of hydrocarbon origin and its accumulation time in the middle and east zone of Wushi Sag[J]. Journal of Northeast Petroleum University, 2016, 40(5): 9-17. doi: 10.3969/j.issn.2095-4107.2016.05.002
    [13]
    胡德胜, 宫立园, 满晓, 等. 北部湾盆地涠西南凹陷雁列断层变换带发育特征及其控储作用: 以古近系流沙港组一段重力流沉积为例[J]. 石油与天然气地质, 2022, 43(6): 1359-1369.

    HU Desheng, GONG Liyuan, MAN Xiao, et al. Development pattern of en echelon fault transition zone in Weixi'nan Sag, Beibu Gulf Basin and its control on hydrocarbon accumulation: a case study of gravity flow deposits in the Palaeogene Liu 1 Member[J]. Oil & Gas Geology, 2022, 43(6): 1359-1369.
    [14]
    秦春雨, 王华, 姜平, 等. 涠西南凹陷边界断层演化及其对地层充填的控制[J]. 中国矿业大学学报, 2020, 49(2): 318-327.

    QIN Chunyu, WANG Hua, JIANG Ping, et al. Boundary fault evolution of Weixinan Sag and its effect on strata filling[J]. Journal of China University of Mining and Technology, 2020, 49(2): 318-327.
    [15]
    魏小松, 陆江, 刘蕾, 等. 涠西南凹陷流沙港组一段天文旋回识别及高频层序划分[J]. 中国海上油气, 2018, 30(6): 99-108.

    WEI Xiaosong, LU Jiang, LIU Lei, et al. Astronomical cycle identification and high frequency sequence division of the 1st member of Liushagang Formation in Weixinan Sag, Beibuwan Basin[J]. China Offshore Oil and Gas, 2018, 30(6): 99-108.
    [16]
    曹磊. 北部湾盆地流二段烃源岩的有机质富集机理及发育模式[D]. 北京: 中国石油大学(北京), 2021.

    CAO Lei. Organic matter enrichment mechanism and development model of source rocks in the 2nd member of Liushagang Formation in Beibuwan Basin[D]. Beijing: China University of Petroleum (Beijing), 2021.
    [17]
    高树生, 胡志明, 刘华勋, 等. 不同岩性储层的微观孔隙特征[J]. 石油学报, 2016, 37(2): 248-256.

    GAO Shusheng, HU Zhiming, LIU Huaxun, et al. Microscopic pore characteristics of different lithological reservoirs[J]. Acta Petrolei Sinica, 2016, 37(2): 248-256.
    [18]
    马云峰, 赵建国, 孙龙, 等. 应力作用下气藏水体微观赋存特征及渗流规律: 以鄂尔多斯盆地神木气田二叠系盒8段致密储层为例[J]. 石油实验地质, 2023, 45(3): 466-473. doi: 10.11781/sysydz202303466

    MA Yunfeng, ZHAO Jianguo, SUN Long, et al. Microscopic occurrence characteristics and seepage law of water bodies in gas reservoir under stress: a case study of tight reservoirs in the eighth member of Permian Shihezi Formation, Shenmu Gas Field, Ordos Basin[J]. Petroleum Geology & Experiment, 2023, 45(3): 466-473. doi: 10.11781/sysydz202303466
    [19]
    姜在兴, 张文昭, 梁超, 等. 页岩油储层基本特征及评价要素[J]. 石油学报, 2014, 35(1): 184-196.

    JIANG Zaixing, ZHANG Wenzhao, LIANG Chao, et al. Characteristics and evaluation elements of shale oil reservoir[J]. Acta Petrolei Sinica, 2014, 35(1): 184-196.
    [20]
    王羽君, 赵晓东, 周伯玉, 等. 基于高压压汞—恒速压汞的低渗砂岩储层孔隙结构评价[J]. 断块油气田, 2022, 29(6): 824-830.

    WANG Yujun, ZHAO Xiaodong, ZHOU Boyu, et al. Evaluation of pore structure in low permeability sandstone reservoir based on high pressure-constant velocity mercury injection[J]. Fault-Block Oil and Gas Field, 2022, 29(6): 824-830.
    [21]
    罗锦昌, 田继军, 贺小标, 等. 准噶尔盆地吉木萨尔凹陷二叠系芦草沟组储层介—宏孔孔隙结构特征及控制因素[J]. 地质科学, 2023, 58(3): 1008-1029.

    LUO Jinchang, TIAN Jijun, HE Xiaobiao, et al. Characteristics and controlling factors of meso-macropore pore structure of Permian Lucaogou Formation reservoir in Jimsar Sag, Junggar Basin[J]. Chinese Journal of Geology, 2023, 58(3): 1008-1029.
    [22]
    IUPAC. Manual of symbol sand terminology[J]. Pure and Applied Chemistry, 1972, 31: 578.
    [23]
    孙照通, 辛红刚, 吕成福, 等. 鄂尔多斯盆地长73亚段泥页岩型页岩油赋存状态与有机地球化学特征[J]. 天然气地球科学, 2022, 33(8): 1304-1318.

    SUN Zhaotong, XIN Honggang, LV Chengfu, et al. Occurrence states and organic geochemical characteristics of shale-type shale oil from Chang 73 sub-member in the Ordos Basin[J]. Natural Gas Geoscience, 2022, 33(8): 1304-1318.
    [24]
    杨正明, 苗盛, 刘先贵, 等. 特低渗透油藏可动流体百分数参数及其应用[J]. 西安石油大学学报(自然科学版), 2007, 22(2): 96-99. doi: 10.3969/j.issn.1673-064X.2007.02.025

    YANG Zhengming, MIAO Sheng, LIU Xiangui, et al. Percentage parameter of the movable fluid in ultra-low permeability reservoir and its application[J]. Journal of Xi'an Shiyou University (Natural Science Edition), 2007, 22(2): 96-99. doi: 10.3969/j.issn.1673-064X.2007.02.025
    [25]
    陈佳伟. 东营凹陷页岩油可动性及有利区优选方法研究[D]. 青岛: 中国石油大学(华东), 2017.

    CHEN Jiawei. Research on the movability of shale oil in Dongying Sag and the optimization method of favorable zone[D]. Qingdao: China University of Petroleum (East China), 2017.
    [26]
    LIU Guoheng, LIU Bo, LIU Keyu, et al. Silica crystallinity: characteristics and controlling factors in marine shale of the Upper Yangtze area, China[J]. Marine and Petroleum Geology, 2022, 143: 105833. doi: 10.1016/j.marpetgeo.2022.105833
    [27]
    TIAN Shansi, BOWEN L, LIU Bo, et al. A method for automatic shale porosity quantification using an Edge-Threshold Automatic Processing (ETAP) technique[J]. Fuel, 2021, 304: 121319. doi: 10.1016/j.fuel.2021.121319
    [28]
    冯国奇, 李吉君, 刘洁文, 等. 泌阳凹陷页岩油富集及可动性探讨[J]. 石油与天然气地质, 2019, 40(6): 1236-1246.

    FENG Guoqi, LI Jijun, LIU Jiewen, et al. Discussion on the enrichment and mobility of continental shale oil in Biyang Depression[J]. Oil & Gas Geology, 2019, 40(6): 1236-1246.
    [29]
    赵贤正, 周立宏, 蒲秀刚, 等. 断陷湖盆湖相页岩油形成有利条件及富集特征: 以渤海湾盆地沧东凹陷孔店组二段为例[J]. 石油学报, 2019, 40(9): 1013-1029.

    ZHAO Xianzheng, ZHOU Lihong, PU Xiugang, et al. Favorable formation conditions and enrichment characteristics of lacustrine facies shale oil in faulted lake basin: a case study of member 2 of Kongdian Formation in Cangdong Sag, Bohai Bay Basin[J]. Acta Petrolei Sinica, 2019, 40(9): 1013-1029.
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Figures(10)  / Tables(1)

    Citation
    XML
    PDF-CN

    Article Metrics

    Article views (60) PDF downloads(14) Cited by()
    Proportional views
    Related

    Website Copyright © Wuxi Research Institute of Petroleum Geology, SINOPEC 苏ICP备15009037号 苏公网安备32021102000780号

    Address：No. 2060, Lihu Avenue, Wuxi, Jiangsu   (214126) Tel：0510-68787204，68787203 Fax：0510-68787113 Email：sysydz.syky@sinopec.com

    Supported by: Beijing Renhe Information Technology Co. Ltd    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return