Main controlling factors for the enrichment of shale oil and significant discovery in second member of Paleogene Funing Formation, Qintong Sag, Subei Basin
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摘要: 在对苏北盆地溱潼凹陷古近系阜宁组二段泥页岩生烃特征、含油性、储集性研究的基础上，剖析页岩油富集的主控因素。溱潼凹陷阜二段泥页岩厚度大、有机碳含量（TOC）中等，具备页岩油富集的物质基础。深凹带阜二段泥页岩镜质体反射率（Ro）为0.9%~1.0%，热演化程度适中，页岩油具有轻烃和气测全烃值高、流动性好的特点；断层不发育，保存条件好，地层压力高，有利于富集高产；脆性矿物含量较高，纹层和天然裂缝发育，可压性好。连续性大面积分布的优质泥页岩是油气富集的基础，保存条件是成藏的关键，热演化程度是含油性的决定因素，异常高压、纹层发育和较高脆性矿物是高产的重要因素。沙垛地区SD1井阜二段页岩油具有低TOC（1%）、低气油比（40~80 m3/t）、高异常压力（1.25 MPa）的特征，该井的成功开发，降低了陆相页岩油评价标准的门限，拓展了页岩油的发展空间。Abstract: Based on the study of hydrocarbon generation features, oil bearing property and reservoir property of shale in the second member of Paleogene Funing Formation in the Qintong Sag of the Subei Basin, the main controlling factors of shale oil enrichment were analyzed. Shale of the second member of Funing Formation in the Qintong Sag was featured by large-scale thickness and medium TOC content, which provided a material basis for shale oil enrichment. The vitrinite reflectance (%Ro) of shale in the second member of Funing Formation in the deep sag distributed between 0.9%-1.0%, indicating a moderate thermal evolution degree. Shale oil has the characteristics of light hydrocarbon, high gas-measured total hydrocarbon value and good fluidity. Few faults were developed, resulting in good preservation conditions and high formation pressure, which were conducive to hydrocarbon enrichment. High content of brittle minerals and well-developed lamella and natural fractures made formation fracturing easier. The continuous and large-area distribution of high-quality shale is the basis for oil and gas abundance. Preservation condition is the key factor to reservoir formation. The degree of evolution is a decisive factor of oil-bearing. High pressure, lamina development and high brittle mineral content are important factors for high yield. The shale oil in second member of Funing Formation in Shaduo area has the characteristics of low TOC content (1%), low gas oil ratio (40-80 m3/t) and high pressure (1.25 MPa). The success of this well has reduced the shale oil evaluation standard and threshold, and expanded the development space of shale oil.
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图 1 苏北盆地溱潼凹陷阜宁组二段页岩油综合评价
Figure 1. Comprehensive evaluation of shale oil in second member of Paleogene Funing Formation, Qintong Sag, Subei Basin
图 2 苏北盆地溱潼凹陷阜宁组二段综合柱状图
Figure 2. Comprehensive bar chart of second member of Paleogene Funing Formation, Qintong Sag, Subei Basin
图 3 苏北盆地溱潼凹陷阜二段有机质类型分布
Figure 3. Organic matter type distribution of second member of Paleogene Funing Formation, Qintong Sag, Subei Basin
图 4 苏北盆地溱潼凹陷阜宁组二段泥页岩储集空间特征(扫描电镜及薄片)
Figure 4. Pore structure of mud shale in second member of Paleogene Funing Formation, Qintong Sag, Subei Basin
图 5 苏北盆地溱潼凹陷阜宁组泥页岩含油饱和度指数(OSI)随深度变化趋势
Figure 5. Variation trend of oil saturation index with depth of shale in Paleogene Funing Formation, Qintong Sag, Subei Basin
图 6 苏北盆地溱潼凹陷过SD1井地震剖面
Figure 6. Seismic profile through well SD1, Qintong Sag, Subei Basin
图 7 苏北盆地溱潼凹陷深凹带阜宁组二段烃源岩热演化史
Figure 7. Thermal evolution history of source rocks in second member of Paleogene Funing Formation in deep subsag of Qintong Sag, Subei Basin
图 8 苏北盆地溱潼凹陷富有机质纹层状泥岩测井图
Figure 8. Imaging log of organic-rich laminated mudstone in Qintong Sag, Subei Basin
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[1] 金之钧, 白振瑞, 高波, 等. 中国迎来页岩油气革命了吗?[J]. 石油与天然气地质, 2019, 40(3): 451-458. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201903002.htmJIN Zhijun, BAI Zhenrui, GAO Bo, et al. Has China ushered in the shale oil and gas revolution?[J]. Oil & Gas Geology, 2019, 40(3): 451-458. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201903002.htm [2] 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. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201905003.htmDU 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. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201905003.htm [3] 赵文智, 朱如凯, 胡素云, 等. 陆相富有机质页岩与泥岩的成藏差异及其在页岩油评价中的意义[J]. 石油勘探与开发, 2020, 47(6): 1079-1089. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK202006003.htmZHAO Wenzhi, ZHU Rukai, HU Suyun, et al. Accumulation contribution differences between lacustrine organic-rich shales and mudstones and their significance in shale oil evaluation[J]. Petroleum Exploration and Development, 2020, 47(6): 1079-1089. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK202006003.htm [4] 黎茂稳, 马晓潇, 蒋启贵, 等. 北美海相页岩油形成条件、富集特征与启示[J]. 油气地质与采收率, 2019, 26(1): 13-28. https://www.cnki.com.cn/Article/CJFDTOTAL-YQCS201901002.htmLI Maowen, MA Xiaoxiao, JIANG Qigui, et al. Enlightenment from formation conditions and enrichment characteristics of marine shale oil in North America[J]. Petroleum Geology and Recovery Efficiency, 2019, 26(1): 13-28. https://www.cnki.com.cn/Article/CJFDTOTAL-YQCS201901002.htm [5] 朱德顺. 陆相湖盆页岩油富集影响因素及综合评价方法: 以东营凹陷和沾化凹陷为例[J]. 新疆石油地质, 2019, 40(3): 269-275. https://www.cnki.com.cn/Article/CJFDTOTAL-XJSD201903003.htmZHU Deshun. Influencing factor analysis and comprehensive evaluation method of lacustrine shale oil: cases from Dongying and Zhanhua sags[J]. Xinjiang Petroleum Geology, 2019, 40(3): 269-275. https://www.cnki.com.cn/Article/CJFDTOTAL-XJSD201903003.htm [6] 匡立春, 侯连华, 杨智, 等. 陆相页岩油储层评价关键参数及方法[J]. 石油学报, 2021, 42(1): 1-14. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB202101001.htmKUANG Lichun, HOU Lianhua, YANG Zhi, et al. Key parameters and methods of lacustrine shale oil reservoir characterization[J]. Acta Petrolei Sinica, 2021, 42(1): 1-14. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB202101001.htm [7] 林会喜, 王圣柱, 杨艳艳, 等. 博格达地区中二叠统芦草沟组页岩油储集特征[J]. 断块油气田, 2020, 27(4): 418-423. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202004004.htmLIN Huixi, WANG Shengzhu, YANG Yanyan, et al. Shale oil reservoir characteristics of Middle Permian Lucaogou Formation in Bogda area[J]. Fault-Block Oil and Gas Field, 2020, 27(4): 418-423. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202004004.htm [8] 支东明, 宋永, 何文军, 等. 准噶尔盆地中—下二叠统页岩油地质特征、资源潜力及勘探方向[J]. 新疆石油地质, 2019, 40(4): 389-401. https://www.cnki.com.cn/Article/CJFDTOTAL-XJSD201904002.htmZHI Dongming, SONG Yong, HE Wenjun, et al. Geological characte-ristics, resource potential and exploration direction of shale oil in Middle-Lower Permian, Junggar basin[J]. Xinjiang Petroleum Geology, 2019, 40(4): 389-401. https://www.cnki.com.cn/Article/CJFDTOTAL-XJSD201904002.htm [9] 杨智, 邹才能, 付金华, 等. 大面积连续分布是页岩层系油气的标志特征: 以鄂尔多斯盆地为例[J]. 地球科学与环境学报, 2019, 41(4): 459-474. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGX201904007.htmYANG Zhi, ZOU Caineng, FU Jinhua, et al. Characteristics and "sweet area (section)" evaluation of continuous tight & shale oil and gas in Ordos Basin, north-central China[J]. Journal of Earth Sciences and Environment, 2019, 41(4): 459-474. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGX201904007.htm [10] 刘世丽, 段宏亮, 章亚, 等. 苏北盆地阜二段陆相页岩油气勘探潜力分析[J]. 海洋石油, 2014, 34(3): 27-33. https://www.cnki.com.cn/Article/CJFDTOTAL-HYSY201403007.htmLIU Shili, DUAN Hongliang, ZHANG Ya, et al. Analysis of oil and gas exploration potential in F2 member continental shale of Subei Basin[J]. Offshore Oil, 2014, 34(3): 27-33. https://www.cnki.com.cn/Article/CJFDTOTAL-HYSY201403007.htm [11] 黎茂稳, 金之钧, 董明哲, 等. 陆相页岩形成演化与页岩油富集机理研究进展[J]. 石油实验地质, 2020, 42(4): 489-505. doi: 10.11781/sysydz202004489LI Maowen, JIN Zhijun, DONG Mingzhe, et al. Advances in the basic study of lacustrine shale evolution and shale oil accumulation[J]. Petroleum Geology & Experiment, 2020, 42(4): 489-505. doi: 10.11781/sysydz202004489 [12] 昝灵, 骆卫峰, 马晓东. 苏北盆地溱潼凹陷阜二段烃源岩生烃潜力及形成环境[J]. 非常规油气, 2016, 3(3): 1-8. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201603001.htmZAN Ling, LUO Weifeng, MA Xiaodong. Hydrocarbon generation potential and genetic environments of second member of Funing Formation in Qintong Sag, Subei Basin[J]. Unconventional Oil & Gas, 2016, 3(3): 1-8. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201603001.htm [13] 昝灵, 骆卫峰, 印燕铃, 等. 苏北盆地溱潼凹陷古近系阜宁组二段页岩油形成条件及有利区评价[J]. 石油实验地质, 2021, 43(2): 233-241. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD202102006.htmZAN Ling, LUO Weifeng, YIN Yanling, et al. Formation conditions of shale oil and favorable targets in the second member of Paleogene Funing Formation in Qintong Sag, Subei Basin[J]. Petroleum Geology & Experiment, 2021, 43(2): 233-241. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD202102006.htm [14] 蒋启贵, 黎茂稳, 马媛媛, 等. 页岩油可动性分子地球化学评价方法: 以济阳坳陷页岩油为例[J]. 石油实验地质, 2018, 40(6): 849-854. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD201806015.htmJIANG Qigui, LI Maowen, MA Yuanyuan, et al. Molecular geochemical evaluation of shale oil mobility: a case study of shale oil in Jiyang Depression[J]. Petroleum Geology & Experiment, 2018, 40(6): 849-854. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD201806015.htm [15] 李浩, 陆建林, 王保华, 等. 渤海湾盆地东濮凹陷陆相页岩油可动性影响因素与资源潜力[J]. 石油实验地质, 2020, 42(4): 632-638. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD202004020.htmLI Hao, LU Jianlin, WANG Baohua, et al. Controlling factors of continental shale oil mobility and resource potential in Dongpu Sag, Bohai Bay Basin[J]. Petroleum Geology & Experiment, 2020, 42(4): 632-638. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD202004020.htm [16] 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): 789-802. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201904020.htmWANG 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): 789-802. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201904020.htm [17] 周立宏, 刘学伟, 付大其, 等. 陆相页岩油岩石可压裂性影响因素评价与应用: 以沧东凹陷孔二段为例[J]. 中国石油勘探, 2019, 24(5): 670-678. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201905014.htmZHOU Lihong, LIU Xuewei, FU Daqi, et al. Evaluation and application of influencing factors on the fracturability of continental shale oil reservoir: a case study of Kong 2 member in Cangdong Sag[J]. China Petroleum Exploration, 2019, 24(5): 670-678. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201905014.htm [18] 周立宏, 蒲秀刚, 肖敦清, 等. 渤海湾盆地沧东凹陷孔二段页岩油形成条件及富集主控因素[J]. 天然气地球科学, 2018, 29(9): 1323-1332. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201809010.htmZHOU Lihong, PU Xiugang, XIAO Dunqing, et al. Geological conditions for shale oil formation and the main controlling factors for the enrichment of the 2nd member of Kongdian Formation in the Cangdong Sag, Bohai Bay Basin[J]. Natural Gas Geoscience, 2018, 29(9): 1323-1332. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201809010.htm [19] 李浩, 陆建林, 王保华, 等. 陆相页岩油富集高产关键因素分析[J]. 现代地质, 2020, 34(4): 837-848. https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ202004020.htmLI Hao, LU Jianlin, WANG Baohua, et al. Critical controlling factors of enrichment and high-yield of land shale oil[J]. Geoscience, 2020, 34(4): 837-848. . https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ202004020.htm [20] 苏思远, 姜振学, 宁传祥, 等. 沾化凹陷页岩油富集可采主控因素研究[J]. 石油科学通报, 2017, 2(2): 187-198. https://www.cnki.com.cn/Article/CJFDTOTAL-SYKE201702003.htmSU Siyuan, JIANG Zhenxue, NING Chuanxiang, et al. Study of the main controlling factors of shale oil enrichment in the Zhanhua Sag[J]. Petroleum Science Bulletin, 2017, 2(2): 187-198. https://www.cnki.com.cn/Article/CJFDTOTAL-SYKE201702003.htm -
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