Occurrence and recoverability of tight oil in Paleogene Funing Formation, Subei Basin
-
摘要: 利用多温阶热解与核磁共振测试技术，对苏北盆地古近系阜宁组阜二、阜四段泥页岩、夹层及邻层致密碳酸盐岩、致密砂岩样品系统分析，结合少量泥页岩油试采资料，探讨了阜宁组泥页岩、夹层及邻层致密储层的含油性和致密油可动用性。苏北盆地阜二、阜四段泥页岩中含致密油一般小于5.0 mg/g，油以吸附-互溶态为主，吸附-互溶态油占总滞留油的比例总体随埋藏深度的增大呈降低趋势，轻质游离油总体很低，可动油率小于3%；阜二、阜四段泥页岩夹层和邻层砂岩中含油一般大于5.0 mg/g，以游离油为主，轻质游离油量一般大于0.25 mg/g，可动油率一般在4%~7%之间，与北美Bakken中段致密砂岩油可动油率(5%左右)接近。阜宁组泥页岩内可动致密油主要赋存于裂缝中，即构造裂缝为可动致密油主要赋存空间，部分微孔隙(喉道半径大于0.18 μm)为次要赋存空间；致密油赋存相态应以游离态为主，吸附态次之。阜二、阜四段邻层(阜一、阜三段)裂缝型湖相碳酸盐岩致密油初期产量较高，但产量递减快，生产周期也短，经济可采性有限；相比之下，阜二、阜四段的源内夹层型致密砂岩油初始产量不高，但递减慢，生产周期长，具有较好的经济可采性。Abstract: The shale, interlayers and adjacent carbonate rocks and siltstones in the second and fourth members of the Paleogene Funing Formation in the Subei Basin were studied using multi-temperature pyrolysis and NMR. The oil-bearing capacity of shale, interlayers and adjacent tight reservoirs in the Funing Formation and the movability of tight oil were evaluated in combination with with shale oil production data. In the second and fourth members of the Funing Formation, the content of tight oil is generally less than 5.0 mg/g in shale. Adsorption-miscible oil is dominant, and the ratio of which to total retained oil decreases with the increase of burial depth. Light free oil generally has a low content, and the actual movable oil ratio is less than 3%. However, the tight oil content is generally greater than 5 mg/g in mud shale interlayers and adjacent sandstones (oily), dominated by free oil. The light free oil content is generally more than 0.25 mg/g, and the actual movable oil ratio is generally between 4% and 7%, which is close to the 5% recovery ratio in the tight sandstone layers before reconstruction in the middle of Bakken Formation in North America. The movable tight oil mainly exists in fractures in the Funing Formation in the Subei Basin. That is, tectonic fractures are the main host of movable shale oil, and some micro pores (with ramp radius greater than 0.18 μm) work as secondary occurrence porosity. Free oil exceeds adsorbed oil. The initial production of tight oil is high in fissured lacustrine carbonates in the first and third members of the Funing Formation, but the production decreases rapidly with a short production cycle, and the economic recoverability is limited. In contrast, the initial production is lower in the tight interlayer sandstones of the source in the second and fourth members of the Funing Formation, which has a slower decline rate, longer production cycle and better economical recoverability.
-
Key words:
- occurrence state /
- recoverability /
- tight oil /
- Funing Formation /
- Paleogene /
- Subei Basin
-
图 1 苏北盆地阜宁组致密油成藏组合分布
Figure 1. Accumulation association of tight oil in Funing Formation, Subei Basin
图 2 苏北盆地金湖、高邮凹陷阜二、阜四段泥页岩和夹层及邻层砂岩滞留油总量
Figure 2. Total hydrocarbon retention in shale, interlayer and adjacent sandstones in second and fourth members of Funing Formation, Jinhu and Gaoyou sags, Subei Basin
图 3 苏北盆地阜宁组致密油各组分与TOC的关系
Figure 3. TOC content vs. tight oil components of Funing Formation, Subei Basin
图 4 苏北盆地阜二段、阜四段油饱和指数与Tmax的关系
Figure 4. Relationship between oil saturation index and Tmax of second and fourth members of Funing Formation, Subei Basin
图 5 苏北盆地纹层状湖相碳酸盐岩核磁分析弛豫时间T2分布
Figure 5. T2 distribution spectrum by NMR of lamellar lacustrine carbonates, Subei Basin
图 6 苏北盆地高邮凹陷黄158井E1f4泥页岩可动流体与基质孔隙度、有机碳含量的关系
Figure 6. Relationship between movable fluid and matrix porosity (left), TOC content (right) in fourth member of Funing Formation, well Huang 158, Gaoyou Sag, Subei Basin
图 7 苏北盆地许X38和天X96井致密油生产曲线
Figure 7. Production curves of tight oil in wells Xu X 38 and Tian X 96, Subei Basin
表 1 苏北盆地阜宁组源—储叠置关系与成藏组合分布
Table 1. Source-reservoir superimposed relationship and accumulation association in Funing Formation, Subei Basin
地层 储集层 生油层 成藏组合 油气成藏地区及岩性 段 亚段 厚度/m Φ/% K/10-3 μm2 厚度/m w(TOC)/% 源下 源内 远源 E1f4 E1f41 ＞100 1.2 ⑤远源断砂输导型 高邮致密砂岩 E1f42 ＞100 0.74 E1f3 E1f31 ＜30 8~12 0.1~1 E1f32 E1f33 ＜20 E1f2 E1f21 5~10 3.2 40~80 2.14 ②源内 金湖碳酸盐岩、砂岩夹层 E1f22 5~10 8~26 2.2~79.8 60~80 1.29 ①源下 ③源内 E1f23 ＜40 8~12 0.1~1 5~10 0.98 ④源内 E1f1 E1f11 ＜80 8~12 0.1~1 高邮致密砂岩 
下载: 导出CSV
表 2 苏北盆地金湖-高邮凹陷阜二、阜四段泥页岩及夹层与邻层砂岩含油性与可动性评价
Table 2. Evaluation of oil content and mobility in shale, interlayer and adjacent sandstones in second and fourth members of Funing Formation, Jinhu and Gaoyou sags, Subei Basin
岩性 井号 层位 样品位置 游离轻质油S1-1/(mg·g-1) 游离轻—中质油S1-2/(mg·g-1) 吸附—互溶油S2-1/(mg·g-1) 游离烃总量/(mg·g-1) 总滞留油量/(mg·g-1) 总游离烃/总滞留油/% 吸附—互溶油/总滞留油/% 游离轻质油/总滞留油/% 热解再生油S2-2/(mg·g-1) 凹陷 浅灰色粉砂岩 程2 E1f2 夹层 0.07 2.46 1.02 2.53 3.55 69.30 28.73 1.97 0.50 金湖 灰色粉砂质泥岩 程2 E1f2 夹层 0.00 0.01 0.02 0.01 0.03 33.33 66.67 0.00 0.05 浅灰色灰质泥岩 崔2 E1f3 邻层 0.00 0.15 1.84 0.15 1.99 7.54 92.46 0.00 2.73 灰色粉砂岩 戴1 E1f2 夹层 0.01 1.18 7.59 1.19 8.78 13.44 86.45 0.11 7.22 深灰色泥灰岩 河X4 E1f4 邻层 0.00 0.12 2.03 0.12 2.15 5.58 94.42 0.00 4.32 灰色粉砂岩 河X4 E1f2 夹层 0.41 6.11 3.25 6.52 9.77 62.54 33.27 4.20 1.55 深灰色泥岩 河X4 E1f2 泥页岩 0.00 0.01 0.02 0.01 0.03 33.33 66.67 0.00 0.02 灰黑色泥岩 河参1 E1f2 泥页岩 0.02 0.98 1.29 1.00 2.29 42.79 56.33 0.87 2.52 灰黑色泥岩 河参1 E1f2 泥页岩 0.06 1.33 3.07 1.39 4.46 29.82 68.83 1.35 4.96 灰黑色泥岩 河参1 E1f2 泥页岩 0.00 0.01 0.04 0.01 0.05 20.00 80.00 0.00 0.08 灰色粉砂岩 唐5 E1f2 夹层 0.61 8.31 5.10 8.92 14.02 59.27 36.38 4.35 3.07 深灰色砂质泥岩 天89 E1f2 夹层 0.00 0.19 0.35 0.19 0.54 35.19 64.81 0.00 0.39 灰色砂岩 天X79 E1f4 夹层 0.51 6.29 2.97 6.80 9.77 64.38 30.40 5.22 2.51 深灰色泥岩 天X79 E1f4 泥页岩 0.00 0.03 0.06 0.03 0.09 33.33 66.67 0.00 0.10 灰色泥岩 大X3 E1f2 泥页岩 0.00 0.65 5.52 0.65 6.17 10.53 89.47 0.00 7.99 高邮 灰色泥岩 方4 E1f3 邻层 0.21 3.56 7.58 3.77 11.35 31.37 66.78 1.85 13.90 灰黑色泥岩 富深1 E1f1 邻层 0.02 0.34 0.33 0.36 0.69 49.28 47.83 2.90 0.29 灰黑色泥岩 富深1 E1f2 泥页岩 0.07 0.92 1.10 0.99 2.09 44.02 52.63 3.35 1.96 灰黑色泥岩 富深1 E1f4 泥页岩 0.02 0.77 3.29 0.79 4.08 18.87 80.64 0.49 9.21 深灰色泥岩 花深1 E1f3 0.02 0.14 0.12 0.16 0.28 50.00 42.86 7.14 0.59 灰色粉砂岩 联5 E1f2 夹层 0.00 0.02 0.01 0.02 0.03 66.67 33.33 0.00 0.01 深灰色泥灰岩 联5 E1f3 邻层 0.00 0.05 0.23 0.05 0.28 17.86 82.14 0.00 0.56 黑色泥岩 联5 E1f4 泥页岩 0.00 0.02 0.09 0.02 0.11 18.18 81.82 0.00 0.16 灰黑色泥岩 临X3 E1f2 泥页岩 0.00 0.04 0.18 0.04 0.22 18.18 81.82 0.00 0.24 灰白色砂岩 沙20 E1f1 邻层 0.86 14.49 5.57 15.35 20.92 69.26 26.63 4.11 2.73 深灰色砂岩 沙20 E1f1 邻层 0.72 12.90 6.02 13.62 19.64 65.68 30.65 3.67 2.82 深灰色粉砂岩 韦5 E1f1 邻层 0.59 9.43 7.69 10.02 17.71 53.25 43.42 3.33 4.50
下载: 导出CSV
表 3 苏北盆地高邮凹陷黄158井E1f4泥、页岩可动流体含量统计
Table 3. Movable fluid content in mud shale in fourth member of Funing Formation, well Huang 158, Gaoyou Sag, Subei Basin
裂缝发育情况 可动流体含量/% 孔隙度/% 所有样品 有可动流体的样品 所有样品 发育裂缝 0.17(17) 0.14~2.52/1.47(2) 0.24~6.58/2.10(17) 多发育裂缝 3.34(89) 0.01~20.68/6.75(44) 0.26~13.2/4.20(89) 薄层状，2个页状 0.27(32) 1.06~3.80/2.15(4) 1.5~10.18/6.00(32) 薄层状，发育裂缝 0.81(36) 0.14~11.58/4.86(6) 1.39~10.36/6.20(36) 注：表中数值意义：最小值~最大值/平均值(样品数)。
下载: 导出CSV
-
[1] SONNENBERG S A, PRAMUDITO A. Petroleum geology of the Giant Elm Coulee Field, Williston Basin[J]. AAPG Bulletin, 2009, 93(9): 1127-1153. doi: 10.1306/05280909006 [2] U.S. Energy Information Administration. Lower 48 states shale plays[R]. Washington, D.C. : U.S. Energy Information Admini-stration, 2016. [3] 贾承造, 邹才能, 李建忠, 等. 中国致密油评价标准、主要类型、基本特征及资源前景[J]. 石油学报, 2012, 33(3): 343-350. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201203000.htmJIA Chengzao, ZOU Caineng, LI Jianzhong, et al. Assessment criteria, main types, basic features and resource prospects of the tight oil in China[J]. Acta Petrolei Sinica, 2012, 33(3): 343-350. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201203000.htm [4] 邹才能, 朱如凯, 白斌, 等. 致密油与页岩油内涵、特征、潜力及挑战[J]. 矿物岩石地球化学通报, 2015, 34(1): 1-17. https://www.cnki.com.cn/Article/CJFDTOTAL-KYDH201501002.htmZOU Caineng, ZHU Rukai, BAI Bin, et al. Significance, geologic characteristics, resource potential and future challenges of tight oil and shale oil[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 2015, 34(1): 1-17. https://www.cnki.com.cn/Article/CJFDTOTAL-KYDH201501002.htm [5] 杨华, 李士祥, 刘显阳. 鄂尔多斯盆地致密油、页岩油特征及资源潜力[J]. 石油学报, 2013, 34(1): 1-11. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201301000.htmYANG Hua, LI Shixiang, LIU Xianyang. Characteristics and resource prospects of tight oil and shale oil in Ordos Basin[J]. Acta Petrolei Sinica, 2013, 34(1): 1-11. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201301000.htm [6] 胡英杰. 湖相碳酸盐岩致密油主控因素及"甜点"刻画[J]. 特种油气藏, 2018, 25(6): 6-11. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201806002.htmHU Yingjie. Main-controlling factorsand "sweet-spot " characte-rization of lacustrine carbonate tight oil reservoir[J]. Special Oil & Gas Reservoirs, 2018, 25(6): 6-11. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201806002.htm [7] 刘秀婵, 陈西泮. 鄂尔多斯盆地富县地区长8油层组致密油成藏主控因素分析[J]. 油气藏评价与开发, 2019, 9(1): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ201901002.htmLIU Xiuchan, CHEN Xipan. Analysis on main controlling factors of tight oil reservoirs in Chang-8 reservoir of Fu County, Ordos Basin[J]. Reservoir Evaluation and Development, 2019, 9(1): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ201901002.htm [8] 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 [9] 邱旭明, 刘玉瑞, 傅强. 苏北盆地上白垩统—第三系层序地层与沉积演化[M]. 北京: 地质出版社, 2006: 1-59.QIU Xuming, LIU Yurui, FU Qiang. Sequence stratigraphy and sedimentary evolution of the Upper Cretaceous and third systems in Subei Basin[M]. Beijing: Geological Publishing House, 2006: 1-59. [10] 郑开富, 彭霞玲. 苏北盆地上白垩统—第三系页岩油气成藏层位及有利区带[J]. 地质学刊, 2013, 37(1): 147-154. https://www.cnki.com.cn/Article/CJFDTOTAL-JSDZ201301028.htmZHENG Kaifu, PENG Xialing. Hydrocarbon accumulation and favorable zone of shale oil and gas in Upper Cretaceous-Neogene of North Jiangsu Basin[J]. Journal of Geology, 2013, 37(1): 147-154. https://www.cnki.com.cn/Article/CJFDTOTAL-JSDZ201301028.htm [11] 王红伟, 段宏亮. 盐城凹陷阜二段页岩油形成条件及富集规律研究[J]. 复杂油气藏, 2016, 9(3): 14-18. https://www.cnki.com.cn/Article/CJFDTOTAL-FZYQ201603004.htmWANG Hongwei, DUAN Hongliang. Formation condition and enrichment rule of shale oil in the second member of Funing Formation in Yancheng Sag[J]. Complex Hydrocarbon Reservoirs, 2016, 9(3): 14-18. https://www.cnki.com.cn/Article/CJFDTOTAL-FZYQ201603004.htm [12] 王海方. 苏北盆地古近系页岩油储层有效裂缝识别[J]. 西南石油大学学报(自然科学版), 2016, 38(3): 21-27. https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY201603003.htmWANG Haifang. Recognition of effective fractures within the oil shale in the fourth member of Funing Formation in Northern Jiangsu Basin[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2016, 38(3): 21-27. https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY201603003.htm [13] 张喜林, 朱筱敏, 钟大康, 等. 苏北盆地高邮凹陷第三系—上白垩统层序地层格架特征[J]. 沉积学报, 2004, 22(3): 393-399. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB200403004.htmZHANG Xilin, ZHU Xiaomin, ZHONG Dakang, et al. The character of sequence framework of Tertiary and Upper Cretaceous in Gaoyou Sag, Subei Basin[J]. Acta Sedimentologica Sinica, 2004, 22(3): 393-399. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB200403004.htm [14] 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 [15] 段宏亮, 何禹斌. 高邮凹陷阜四段页岩可压裂性分析[J]. 复杂油气藏, 2014, 7(1): 1-3. https://www.cnki.com.cn/Article/CJFDTOTAL-FZYQ201401001.htmDUANH Hongliang, HE Yubin. Analysis on fracability of E1f4 shale in Gaoyou Sag[J]. Complex Hydrocarbon Reservoirs, 2014, 7(1): 1-3. https://www.cnki.com.cn/Article/CJFDTOTAL-FZYQ201401001.htm [16] 闫林, 冉启全, 高阳, 等. 新疆芦草沟组致密油赋存形式及可动用性评价[J]. 油气藏评价与开发, 2017, 7(6): 20-25. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ201706004.htmYAN Lin, RAN Qiquan, GAO Yang, et al. Tight oil occurrence form and recoverability evaluation of tight oil reservoir in Lucaogou Formation of Xinjiang[J]. Reservoir Evaluation and Development, 2017, 7(6): 20-25. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ201706004.htm [17] 熊生春, 储莎莎, 皮淑慧, 等. 致密油藏储层微观孔隙特征与可动用性评价[J]. 地球科学, 2017, 42(8): 1379-1385. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201708015.htmXIONG Shengchun, CHU Shasha, PI Shuhui, et al. Micro-pore characteristics and recoverability of tight oil reservoirs[J]. Earth Science, 2017, 42(8): 1379-1385. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201708015.htm [18] 王秀宇, 巨明霜, 杨文胜, 等. 致密油藏动态渗吸排驱规律与机理[J]. 油气地质与采收率, 2019, 26(3): 92-98. https://www.cnki.com.cn/Article/CJFDTOTAL-YQCS201903012.htmWANG Xiuyu, JU Mingshuang, YANG Wensheng, et al. Dynamic imbibition principles and mechanism of tight oil reservoirs[J]. Petroleum Geology and Recovery Efficiency, 2019, 26(3): 92-98. https://www.cnki.com.cn/Article/CJFDTOTAL-YQCS201903012.htm [19] 闫林, 冉启全, 高阳, 等. 新疆芦草沟组致密油赋存形式及可动用性评价[J]. 油气藏评价与开发, 2017, 7(6): 20-25. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ201706004.htmYAN Lin, RAN Qiquan, GAO Yang, et al. Tight oil occurrence form and recoverability evaluation of tight oil reservoir in Lucaogou Formation of Xinjiang[J]. Reservoir Evaluation and Development, 2017, 7(6): 20-25. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ201706004.htm [20] 郎东升, 郭树生, 马德华. 评价储层含油性的热解参数校正方法及其应用[J]. 海相油气地质, 1996, 1(1): 53-55. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ199604011.htmLANG Dongsheng, GUO Shusheng, MA Dehua. The correlation method of pyrolysis parameters to evaluate hydrocarbon-bearing samples from reservoirs[J]. Marine Origin Petroleum Geology, 1996, 1(1): 53-55. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ199604011.htm [21] 蒋启贵, 黎茂稳, 钱门辉, 等. 不同赋存状态页岩油定量表征技术与应用研究[J]. 石油实验地质, 2016, 38(6): 842-849. doi: 10.11781/sysydz201606842JIANG Qigui, LI Maowen, QIAN Menhui, et al. Quantitative characterization of shale oil in different occurrence states and its application[J]. Petroleum Geology & Experiment, 2016, 38(6): 842-849. doi: 10.11781/sysydz201606842 [22] 王震亮. 致密岩油的研究进展、存在问题和发展趋势[J]. 石油实验地质, 2013, 35(6): 587-595. doi: 10.11781/sysydz201306587WANG Zhenliang. Research progress, existing problem and development trend of tight rock oil[J]. Petroleum Geology & Experiment, 2013, 35(6): 587-595. doi: 10.11781/sysydz201306587 [23] 周尚文, 薛华庆, 郭伟. 川中侏罗系致密油储层可动流体实验[J]. 辽宁工程技术大学学报(自然科学版), 2014, 33(6): 768-772. https://www.cnki.com.cn/Article/CJFDTOTAL-FXKY201406010.htmZHOU Shangwen, XUE Huaqing, GUO Wei. Experimental of movable fluid of tight oil reservoir in Jurassic tight oil reservoirs in central Sichuan Basin[J]. Journal of Liaoning Technical University (Natural Science), 2014, 33(6): 768-772. https://www.cnki.com.cn/Article/CJFDTOTAL-FXKY201406010.htm [24] 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. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201406001.htmZHANG 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. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201406001.htm -
图(7) / 表(3)
计量
- 文章访问数: 1023
- HTML全文浏览量: 144
- PDF下载量: 256
- 被引次数: 0
苏公网安备32021102000780号