陆东凹陷交力格洼陷九佛堂组页岩油赋存状态及孔径下限表征

The characterization of occurrence state and pore size lower limit of shale oil in Jiufotang Formation of Jiaolige Subsag, Ludong Sag

摘要

以陆东凹陷交力格洼陷九佛堂组为例,利用激光共聚焦显微镜、氩离子抛光和场发射扫描电镜、低温氮气吸附、岩石热解、高压压汞及一维核磁共振等实验,根据轻重质组分赋存状态、微孔孔径和全尺度孔径分布等,研究页岩油的微观赋存状态及赋存孔径下限。结果表明:陆东凹陷交力格洼陷九佛堂组泥页岩各种类型孔隙见页岩油的赋存。轻质组分主要赋存空间为页理缝和大孔,形态多呈蜂窝状、丝缕状和扁豆状;重质组分主要赋存空间为页理缝、晶间孔、有机孔和微溶孔等。页岩油赋存孔径下限为3nm,游离烃赋存孔径下限为15nm,可动烃赋存孔径下限为40nm;页岩孔径大于15nm的孔隙占比较高,平均为62.1%,研究区页岩油具有较高可动比例。该结果为交力格洼陷九佛堂组页岩油后期开发提供支持。

Abstract

Taking Jiufotang Formation in Jiaolige Subsag of Ludong Sag for example, using laser confocal microscopy, argon ion polishing and field emission scanning electron microscopy, low-temperature nitrogen adsorption, rock pyrolysis, high-pressure mercury intrusion, and one-dimensional nuclear magnetic resonance. The microscopic occurrence state of shale oil and the lower limit of occurrence pore size were studied from occurrence state of light and heavy components, pore size change of micropores and full-scale pore size distribution. The results show that both light and heavy shale oil are present in shale pores with various sizes in Jiufotang Formation of Jiaolige Subsag, Ludong Sag. The light oil mainly resides in the foliation cracks and macropores, mostly showing honeycomb-, thread-, and lentil-shaped morphologies. The heavy oil resides in foliation cracks, intercrystalline pores, organic pores, micro-dissolved pores and so on. The lower pore size limit for shale oil occurrence extraction is 3nm, while the lower pore size limits for free and movable hydrocarbon extraction are 15 and 40nm respectively. There is a relatively high proportion, with the average of 62.1%, the shale pore size is greater than 15nm, indicating that the oil in the shale has a high mobility potential and thus is feasible to extract. The results provide the basis for future development of shale oil in Jiufotang Formation of Jiaolige Subsag, Ludong Sag.

关键词

页岩油 / 赋存状态 / 孔径下限 / 陆东凹陷 / 交力格洼陷 / 九佛堂组

Key words

shale oil / occurrence state / lower limit of aperture / Ludong Sag / Jiaolige Subsag / Jiufotang Formation

参考文献

[1] 逄淑伊, 操应长, 梁超 . 渤海湾盆地东营凹陷沙四上亚段-沙三下亚段岩相特征及沉积环境[J]. 石油与天然气地质, 2019, 40(4): 800-806.

[2] PANG Shuyi , CAO Yingchang , LIANG Chao . Lithofacies characteristics and sedimentary environment of Es4U and Es3L: a case study of well FY1 in Dongying Sag, Bohai Bay Basin[J]. Oil & Gas Geology, 2019, 40(4): 800-806.

[3] 张林晔, 包友书, 李钜源, 等 . 湖相页岩油可动性:以渤海湾盆地济阳坳陷东营凹陷为例[J]. 石油勘探与开发, 2014, 41(6): 641-649.

[4] ZHANG Linye , BAO Youshu , LI Juyuan , et al. Movability of lacustrine shale oil: a case study of Dongying Sag, Jiyang Depression, Bohai Bay Basin[J]. Petroleum Exploration and Development, 2014, 41(6): 641-649.

[5] 李钰, 郭小波, 时保宏, 等 . 鄂尔多斯盆地长7段页岩和泥岩生烃特征及其地质意义:以延安地区为例[J]. 东北石油大学学报, 2022, 46(5): 106-111.

[6] LI Yu , GUO Xiaobo , SHI Baohong , et al. Hydrocarbon generation characteristics and geological significance of shale and mudstone in Chang 7 Member, Ordos Basin: a case study of Yan'an Area[J]. Journal of Northeast Petroleum University, 2022, 46(5): 106-111.

[7] 孙建博, 孙兵华, 赵谦平, 等 . 鄂尔多斯盆地富县地区延长组长7湖相页岩油地质特征及勘探潜力评价[J]. 中国石油勘探, 2018, 23(6): 29-37.

[8] SUN Jianbo , SUN Binghua , ZHAO Qianping , et al. Geological characteristics and exploration potential evaluation of Chang 7 lacustrine shale oil in Yanchang Formation, Fuxian Area, Ordos Basin[J]. China Petroleum Exploration, 2018, 23(6): 29-37.

[9] 周华建, 孙先达, 柳波, 等 . 松辽盆地青一段微晶碳酸盐岩微观特征分析与原油组分赋存状态表征[J]. 东北石油大学学报, 2020, 44(5): 13-22.

[10] ZHOU Huajian , SUN Xianda , LIU Bo , et al. Analysis of microscopic characteristics of microcrystalline carbonate rocks and occurrence state of crude oil components in Qing 1st Member of Songliao Basin[J]. Journal of Northeast Petroleum University, 2020, 44(5): 13-22.

[11] 柳波, 石佳欣, 付晓飞, 等 . 陆相泥页岩层系岩相特征与页岩油富集条件:以松辽盆地古龙凹陷白垩系青山口组一段富有机质泥页岩为例[J]. 石油勘探与开发, 2018, 45(5): 828-838.

[12] LIU Bo , SHI Jiaxin , FU Xiaofei , et al. Petrological characteristics and shale oil enrichment of lacustrine fine-grained sedimentary system: a case of organic-rich shale in first member of Cretaceous Qingshankou Formation in Gulong Sag, Songliao Basin, NE China[J]. Petroleum Exploration and Development, 2018, 45(5): 828-838.

[13] 徐兴友, 刘卫彬, 白静, 等 . 松辽盆地南部青山口组一段页岩油富集地质特征及资源潜力[J]. 地质与资源, 2021, 30(3): 296-305.

[14] XU Xingyou , LIU Weibin , BAI Jing , et al. Enrichment characteristics and resource potential of shale oil in the first member of Qingshankou Formation in Southern Songliao Basin[J]. Geology and Resources, 2021, 30(3): 296-305.

[15] 柳波, 迟亚奥, 黄志龙, 等 . 三塘湖盆地马朗凹陷二叠系油气运移机制与页岩油富集规律[J]. 石油与天然气地质, 2013, 34(6): 725-730.

[16] LIU Bo , CHI Yaao , HUANG Zhilong , et al. Migration mechanism of the Permian hydrocarbon and shale oil accumulation in Malang Sag, the Santanghu Basin[J]. Oil & Gas Geology, 2013, 34(6): 725-730.

[17] 冯国忠, 胡凯, 张巨兴 . 内蒙古开鲁盆地陆东凹陷低熟石油地球化学特征[J]. 石油勘探与开发, 2006, 33(4): 454-460.

[18] FENG Guozhong , HU Kai , ZHANG Juxing . Geochemical characteristics of immature oil from east sag of Kailu Basin, Inner Mongolia, China[J]. Petroleum Exploration and Development, 2006, 33(4): 454-460.

[19] 王延山, 董崟昊, 陈乃申, 等 . 陆东凹陷致密油形成条件及资源潜力探讨[J]. 特种油气藏, 2014, 21(4): 53-58.

[20] WANG Yanshan , DONG Yinhao , CHEN Naishen , et al. Forming conditions and potential of tight oil in Ludong Sag[J]. Special Oil & Gas Reservoirs, 2014, 21(4): 53-58.

[21] 李栋, 郑双金, 任春梅, 等 . 页岩油多孔介质孔隙尺度运移残留规律分析[J]. 东北石油大学学报, 2022, 46(4): 98-103.

[22] LI Dong , ZHENG Shuangjin , REN Chunmei , et al. Residual law analysis of pore scale transport in porous media of shale oil[J]. Journal of Northeast Petroleum University, 2022, 46(4): 98-103.

[23] 王民, 关莹, 李传明, 等 . 济阳坳陷沙河街组湖相页岩储层孔隙定性描述及全孔径定量评价[J]. 石油与天然气地质, 2018, 39(6): 1109-1119.

[24] WANG Min , GUAN Ying , LI Chuanming , et al. Qualitative description and full-pore-size quantitative evaluation of pores in lacustrine shale reservoir of Shahejie Formation, Jiyang Depression[J]. Oil & Gas Geology, 2018, 39(6): 1109-1119.

[25] 王民, 马睿, 李进步, 等 . 济阳坳陷古近系沙河街组湖相页岩油赋存机理[J]. 石油勘探与开发, 2019, 46(4): 790-802.

[26] WANG Min , MA Rui , LI Jinbu , et al. Occurrence mechanism of lacustrine shale oil in the Paleogene Shahejie Formation of Jiyang Depression, Bohai Bay Basin, China[J]. Petroleum Exploration and Development, 2019, 46(4): 790-802.

[27] 刘惠民, 张顺, 包友书, 等 . 东营凹陷页岩油储集地质特征与有效性[J]. 石油与天然气地质, 2019, 40(3): 513-523.

[28] LIU Huimin , ZHANG Shun , BAO Youshu , et al. Geological characteristics and effectiveness of the shale oil reservoir in Dongying Sag[J]. Oil & Gas Geology, 2019, 40(3): 513-523.

[29] 包友书 . 渤海湾盆地东营凹陷古近系页岩油主要赋存空间探索[J]. 石油实验地质, 2018, 40(4): 480-484.

[30] BAO Youshu . Effective reservoir spaces of Paleogene shale oil in the Dongying Depression, Bohai Bay Basin[J]. Petroleum Geology & Experiment, 2018, 40(4): 480-484.

[31] 张瑞雪 . 开鲁盆地陆东凹陷碎屑岩成藏规律[J]. 特种油气藏, 2022, 29(5): 67-71.

[32] ZHANG Ruixue . Accumulation regularity of clastic rocks in Ludong Sag of Kailu Basin[J]. Special Oil & Gas Reservoirs, 2022, 29(5): 67-71.

[33] 刘明洁, 谢庆宾, 刘震, 等 . 内蒙古开鲁盆地陆东凹陷下白垩统九佛堂组-沙海组层序地层格架及沉积相预测[J]. 古地理学报, 2012, 14(6): 734-746.

[34] LIU Mingjie , XIE Qingbin , LIU Zhen , et al. Sequence stratigraphic framework and sedimentary facies prediction of the Jiufotang and Shahai Formations of Lower Cretaceous in Ludong Sag, Kailu Basin, Inner Mongolia[J]. Journal of Palaeogeography, 2012, 14(6): 734-746.

[35] 周约如 . 开鲁盆地陆东凹陷稠油成因分析[J]. 东北石油大学学报, 2021, 45(5): 72-79.

[36] ZHOU Yueru . Analysis of heavy oil genesis in Ludong Sag of Kailu Basin[J]. Journal of Northeast Petroleum University, 2021, 45(5): 72-79.

[37] 孙利, 李三国, 李中超, 等 . 陆家堡凹陷西部地区九佛堂组层序地层格架与分布特征[J]. 油气地质与采收率, 2013, 20(1): 40-43.

[38] SUN Li , LI Sanguo , LI Zhongchao , et al. The sequence stratigraphy framework and distribution characteristics for the Jiufotang Formation in the west area of Lujiapu Sag[J]. Petroleum Geology and Recovery Efficiency, 2013, 20(1): 40-43.

[39] 雷安贵, 王贵迎, 方炳忠 . 陆家堡凹陷油藏分布规律探讨[J]. 特种油气藏, 2007, 14(2): 33-36.

[40] LEI Angui , WANG Guiying , FANG Bingzhong . Study of reservoir distribution in Lujiapu Depression[J]. Special Oil & Gas Reservoirs, 2007, 14(2): 33-36.

[41] 吴亚生, 钟大康, 邱楠生 . 松南地区下白垩统九佛堂组沉积相特征[J]. 石油天然气学报(江汉石油学院学报), 2011, 33(10): 30-33.

[42] WU Yasheng , ZHONG Dakang , QIU Nansheng . Characteristics of sedimentary facies in Cretaceous Jiufotang Formation in Songnan Area[J]. Journal of Oil and Gas Technology, 2011, 33(10): 30-33.

[43] 刘明洁, 谢庆宾, 谭欣雨, 等 . 内蒙古开鲁盆地陆东凹陷九佛堂组层序地层格架与岩性圈闭[J]. 沉积与特提斯地质, 2014, 34(3): 31-37.

[44] LIU Mingjie , XIE Qingbin , TAN Xinyu , et al. Sequence stratigraphic framework and lithologic traps in the Jiufotang Formation, Ludong Depression, Kailu Basin, Inner Mongolia[J]. Sedimentary Geology and Tethyan Geology, 2014, 34(3): 31-37.

[45] 胡钦红, 张宇翔, 孟祥豪, 等 . 渤海湾盆地东营凹陷古近系沙河街组页岩油储集层微米-纳米级孔隙体系表征[J]. 石油勘探与开发, 2017, 44(5): 681-690.

[46] HU Qinhong , ZHANG Yuxiang , MENG Xianghao , et al. Characterization of micro-nanopore networks in shale oil reservoirs of Paleogene Shahejie Formation in Dongying Sag of Bohai Bay Basin, East China[J]. Petroleum Exploration and Development, 2017, 44(5): 681-690.

[47] 曾维主, 周国议, 宋之光 . 松辽盆地青山口组页岩孔隙结构及其对页岩油富集的影响[J]. 地球化学, 2019, 48(6): 633-643.

[48] ZENG Weizhu , ZHOU Guoyi , SONG Zhiguang . Influence of pore structure on the shale oil accumulation of the Qingshankou Formation in the Songliao Basin[J]. Geochimica, 2019, 48(6): 633-643.

[49] 孔星星, 肖佃师, 蒋恕, 等 . 联合高压压汞和核磁共振分类评价致密砂岩储层:以鄂尔多斯盆地临兴区块为例[J]. 天然气工业, 2020, 40(3): 38-47.

[50] KONG Xingxing , XIAO Dianshi , JIANG Shu , et al. Application of the combination of high-pressure mercury injection and nuclear magnetic resonance to the classification and evaluation of tight sandstone reservoirs: a case study of the Linxing Block in the Ordos Basin[J]. Natural Gas Industry, 2020, 40(3): 38-47.

[51] 吴松涛, 朱如凯, 崔景伟, 等 . 非常规储层孔隙结构表征:思路、思考、展望[J]. 地质论评, 2020, 66(增刊1): 151-154.

[52] WU Songtao , ZHU Rukai , CUI Jingwei , et al. Ideas and prospect of porous structure characterization in unconventional reservoirs[J]. Geological Review, 2020, 66(Supp.1): 151-154.

[53] 李志明, 刘鹏, 钱门辉, 等 . 湖相泥页岩不同赋存状态油定量对比:以渤海湾盆地东营凹陷页岩油探井取心段为例[J]. 中国矿业大学学报, 2018, 47(6): 1253-1263.

[54] LI Zhiming , LIU Peng , QIAN Menhui , et al. Quantitative comparison of different occurrence oil for lacustrine shale: a case from cored interval of shale oil special drilling wells in Dongying Depression, Bohai Bay Basin[J]. Journal of China University of Mining & Technology, 2018, 47(6): 1253-1263.

[55] 杨智峰, 唐勇, 郭旭光, 等 . 准噶尔盆地玛湖凹陷二叠系风城组页岩油赋存特征与影响因素[J]. 石油实验地质, 2021, 43(5): 785-796.

[56] YANG Zhifeng , TANG Yong , GUO Xuguang , et al. Occurrence states and potential influencing factors of shale oil in the Permian Fengcheng Formation of Mahu Sag, Junggar Basin[J]. Petroleum Geology & Experiment, 2021, 43(5): 785-796.

[57] 白楠, 徐尚, 王雨轩, 等 . 柴北缘鱼卡地区大煤沟组七段页岩岩相特征及沉积演化模式[J]. 西北地质, 2021, 54(2): 75-85.

[58] BAI Nan , XU Shang , WANG Yuxuan , et al. Facies characteristics and sedimentary evolution model of the 7th member of Dameigou Formation in Yauqia Area, North Qaidam Basin[J]. Northwestern Geology, 2021, 54(2): 75-85.

[59] 邵新荷, 庞雄奇, 胡涛, 等 . 渤海湾盆地东濮凹陷沙三段泥页岩储层孔隙微观特征及其对油气滞留的意义[J]. 石油与天然气地质, 2019, 40(1): 68-77.

[60] SHAO Xinhe , PANG Xiongqi , HU Tao , et al. Microscopic characteristics of pores in Es3 shales and its significances for hydrocarbon retention in Dongpu Sag, Bohai Bay Basin[J]. Oil & Gas Geology, 2019, 40(1): 68-77.

[61] 孙建博, 孙兵华, 赵谦平, 等 . 鄂尔多斯盆地富县地区延长组长7湖相页岩油地质特征及勘探潜力评价[J]. 中国石油勘探, 2018, 23(6): 30-37.

[62] SUN Jianbo , SUN Binghua , ZHAO Qianping , et al. Geological characteristics and exploration potential evaluation of Chang 7 lacustrine shale oil in Yanchang Formation, Fuxian Area, Ordos Basin[J]. China Petroleum Exploration, 2018, 23(6): 30-37.

[63] 张一帆, 查明, 丁修建, 等 . 吉木萨尔凹陷芦草沟组页岩含油性评价及控制因素[J]. 新疆地质, 2021, 39(2): 298-301.

[64] ZHANG Yifan , ZHA Ming , DING Xiujian , et al. Evaluation and controlling factors of shale oil bearing properties of Permian Lucaogou Formation in Jimsar Depression[J]. Xinjiang Geology, 2021, 39(2): 298-301.

[65] 黄振凯, 郝运轻, 李双建, 等 . 鄂尔多斯盆地长7段泥页岩层系含油气性与页岩油可动性评价:以H317井为例[J]. 中国地质, 2020, 47(1): 211-219.

[66] HUANG Zhenkai , HAO Yunqing , LI Shuangjian , et al. Oil bearing potential, mobility evaluation and significance of shale oil in Chang 7 shale system in the Ordos Basin: a case study of well H317[J]. Geology in China, 2020, 47(1): 211-219.

[67] 谢晓永, 唐洪明, 王春华, 等 . 氮气吸附法和压汞法在测试泥页岩孔径分布中的对比[J]. 天然气工业, 2006, 26(12): 100-102.

[68] XIE Xiaoyong , TANG Hongming , WANG Chunhua , et al. Contrast of nitrogen adsorption method and mercury porosimetry method in analysis of shale pore size distribution[J]. Natural Gas Industry, 2006, 26(12): 100-102.

[69] 曹茜, 戚明辉, 张烨毓, 等 . 泥页岩储层全孔径毛管压力曲线的建立及孔隙结构特征研究[J]. 地质论评, 2020, 66(1): 104-106.

[70] CAO Qian , QI Minghui , ZHANG Yeyu , et al. Establishment of the whole-aperture capillary pressure curves and study on pore structure characteristics of shale reservoirs[J]. Geological Review, 2020, 66(1): 104-106.

基金资助

国家科技重大专项(2017ZX05008)