Geological characteristics and optimization of favorable areas in the upper gas reservoir of Jiaoshiba block in the Fuling Shale Gas Field, Sichuan Basin
-
摘要: 以四川盆地涪陵页岩气田焦石坝区块上部气层为研究对象,在对上部气层岩相、地化、孔隙、含气性等页岩品质特征研究的基础上,分别建立了上部气层含气性、可压性评价标准,指出焦石坝区块上部气层以Ⅱ类气层为主,⑧小层含气性最优。优选页岩烃源品质、含气性、构造变形强度、裂缝、埋深5大类8项指标,建立焦石坝上部气层开发选区评价体系,将焦石坝区块上部气层划分为4个区,其中焦页A井区最有利,评价井效果好,可作为焦石坝区块上部气层开发有利区。此外,研究揭示有机质丰度、孔隙度和保存条件是影响焦石坝区块上部气层页岩气富集的主要因素,埋深与地应力和天然裂缝发育程度是上部气层气井高产的主控因素。Abstract: The shale quality characteristics such as lithofacies, geochemistry, porosity and gas bearing properties, some evaluation standards of gas bearing properties and compressibility of the upper gas layer were studied for the upper gas reservoir of Jiaoshiba block in the Fuling Shale Gas Field. The upper gas layer in Jiaoshiba block is mainly of type Ⅱ, and the layer No. 8 has the best gas bearing properties. of five catogaries including shale hydrocarbon source quality, gas bearing capacity, structural deformation strength, fracture and buried depth were optimized, and an evaluation system for development selection of the upper gas reservoir in Jiaoshiba block was established. The upper gas reservoir in Jiaoshiba block was divided into four areas, among which the well block JY-A is the most favorable area, which can be considered to be a standard for gas reservoir development in the upper part of Jiaoshiba block. In addition, the study revealed that organic matter abundance, porosity and preservation conditions are the main factors affecting shale gas enrichment in the upper gas layer of Jiaoshiba block, while burial depth, crustal stress and the extent of natural fracture development are the main factors controlling gas well production in the upper gas reservoir.
-
表 1 四川盆地焦石坝区块焦页A井上部气层龙马溪组有机碳含量纵向分段统计
Table 1. Longitudinal segmented statistics of organic carbon content in Longmaxi Formation in upper gas layer, well JY-A, Jiaoshiba block, Sichuan Basin
小层 埋深/m 厚度/m 有机碳含量/% ⑨ 2 264.3 ~2 283.8 19.5 0.50~1.57/1.10 ⑧ 2 283.8~ 2 300.8 17.0 1.14~2.41/2.02 ⑦ 2 300.8 ~2 313.3 12.5 0.84~2.02/1.60 ⑥ 2 313.3 ~2 322.7 9.4 0.56~1.63/1.57 注:表中数值的意义为:最小值~最大值/平均值。 表 2 四川盆地焦石坝区块焦页A井上部气层五峰组—龙马溪组89m含气页岩段矿物含量分段统计
Table 2. Segmented statistics of mineral content of gas-bearing shale section (89 m) in Wufeng-Longmaxi formations, upper gas layer, well JY-A, Jiaoshiba block, Sichuan Basin
% 小层 全岩X衍射数据 计算数据 黏土矿物 长英质 碳酸盐 黄铁矿 脆性矿物 脆性指数 ⑨ 52.01 41.56 3.28 3.16 44.84 46.30 ⑧ 41.35 42.37 12.28 3.99 54.65 56.93 ⑦ 38.48 46.77 10.04 4.71 56.81 59.62 ⑥ 35.96 48.78 11.54 3.72 60.32 62.65 表 3 四川盆地焦石坝上部气层含气性评价指标体系
Table 3. Evaluation index system for gas-bearing properties of upper gas layers in Jiaoshiba block, Sichuan Basin
评价 含气性综合评价指标 原生品质 含气性 有机碳含量/% 孔隙度/% 含气饱和度/% 测井解释含气量/(m3·t-1) Ⅰ类 ≥4 ≥4 ≥60 ≥5 Ⅱ类 2~4 2~4 45~60 3.0~5.0 Ⅲ类 ≤2 ≤2 ≤45 ≤3.0 表 4 四川盆地焦石坝区块上部气层分层开发评价指标体系
Table 4. Evaluation index system for stratified development of upper gas layer in Jiaoshiba block, Sichuan Basin
综合评价 原生品质 含气性 构造变形强度 裂缝 埋深/m 有机碳含量/% 孔隙度/% 含气饱和度/% 测井解释含气量/
(m3·t-1)发育程度 非均质性 Ⅰ类 ≥4 ≥4 ≥60 ≥ 5.0 0~0.25 弱 弱 ≤3 500 Ⅱ类 Ⅱ1类 2~4 2~4 45~60 3.0~5.0 0.25~0.5 弱 中—弱 ≤3 500 Ⅱ2类 中 中 3 500~4 000 Ⅲ类 Ⅲ1类 ≤2 ≤2 ≤45 ≤3.0 0.5~1.0 中 中—强 ≥4 000 Ⅲ2类 强 强 ≥4 000 -
[1] 王志刚. 涪陵页岩气勘探开发重大突破与启示[J]. 石油与天然气地质, 2015, 36(1): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201501002.htmWANG Zhigang. Breakthrough of Fuling shale gas exploration and development and its inspiration[J]. Oil & Gas Geology, 2015, 36(1): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201501002.htm [2] 赵文智, 贾爱林, 位云生, 等. 中国页岩气勘探开发进展及发展展望[J]. 中国石油勘探, 2020, 25(1): 31-44. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY202001004.htmZHAO Wenzhi, JIA Ailin, WEI Yunsheng, et al. Progress in shale gas exploration in China and prospects for future development[J]. China Petroleum Exploration, 2020, 25(1): 31-44. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY202001004.htm [3] 孙健, 包汉勇. 页岩气储层综合表征技术研究进展: 以涪陵页岩气田为例[J]. 石油实验地质, 2018, 40(1): 1-12 doi: 10.11781/sysydz201801001SUN Jian, BAO Hanyong. Comprehensive characterization of shale gas reservoirs: a case study from Fuling Shale Gas Field[J]. Petroleum Geology & Experiment, 2018, 40(1): 1-12. doi: 10.11781/sysydz201801001 [4] 郭旭升, 胡东风, 魏志红, 等. 涪陵页岩气田的发现与勘探认识[J]. 中国石油勘探, 2016, 21(3): 24-37. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201603003.htmGUO Xusheng, HU Dongfeng, WEI Zhihong, et al. Discovery and exploration of Fuling Shale Gas Field[J]. China Petroleum Exploration, 2016, 21(3): 24-37. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201603003.htm [5] 杨洪志, 赵圣贤, 刘勇, 等. 泸州区块深层页岩气富集高产主控因素[J]. 天然气工业, 2019, 39(11): 55-63. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201911013.htmYANG Hongzhi, ZHAO Shengxian, LIU Yong, et al. Main controlling factors of enrichment and high-yield of deep shale gas in the Luzhou block, southern Sichuan Basin[J]. Natural Gas Industry, 2019, 39(11): 55-63. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201911013.htm [6] 方栋梁, 孟志勇. 页岩气富集高产主控因素分析: 以四川盆地涪陵地区五峰组-龙马溪组一段页岩为例[J]. 石油实验地质, 2020, 42(1): 37-41. doi: 10.11781/sysydz202001037FANG Dongliang, MENG Zhiyong. Main controlling factors of shale gas enrichment and high yield: a case study of Wufeng-Longmaxi formations in Fuling area, Sichuan Basin[J]. Petro-leum Geology & Experiment, 2020, 42(1): 37-41. doi: 10.11781/sysydz202001037 [7] 庞河清, 熊亮, 魏力民, 等. 川南深层页岩气富集高产主要地质因素分析: 以威荣页岩气田为例[J]. 天然气工业, 2019, 39(S1): 78-84. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG2019S1014.htmPANG Heqing, XIONG Liang, WEI Limin, et al. Analysis on the main geological factors of deep shale gas accumulation and high production in southern Sichuan: a case study of Weirong Shale Gas Field[J]. Natural Gas Industry, 2019, 39(S1): 78-84. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG2019S1014.htm [8] 邱振, 邹才能, 王红岩, 等. 中国南方五峰组-龙马溪组页岩气差异富集特征与控制因素[J]. 天然气地球科学, 2020, 31(2): 163-175. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX202002002.htmQIU Zhen, ZOU Caineng, WANG Hongyan, et al. Discussion on characteristics and controlling factors of differential enrichment of Wufeng-Longmaxi formations shale gas in South China[J]. Natural Gas Geoscience, 2020, 31(2): 163-175. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX202002002.htm [9] 王鹏万, 邹辰, 李娴静, 等. 昭通示范区页岩气富集高产的地质主控因素[J]. 石油学报, 2018, 39(7): 744-753. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201807002.htmWANG Pengwan, ZOU Chen, LI Xianjing, et al. Main geological controlling factors of shale gas enrichment and high yield in Zhaotong demonstration area[J]. Acta Petrolei Sinica, 2018, 39(7): 744-753. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201807002.htm [10] 郭旭升. 四川盆地涪陵平桥页岩气田五峰组-龙马溪组页岩气富集主控因素[J]. 天然气地球科学, 2019, 30(1): 1-10. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201901001.htmGUO Xusheng. Controlling factors on shale gas accumulations of Wufeng-Longmaxi formations in Pingqiao Shale Gas Field in Fuling area, Sichuan Basin[J]. Natural Gas Geoscience, 2019, 30(1): 1-10. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201901001.htm [11] 舒志恒, 方栋梁, 郑爱维, 等. 四川盆地焦石坝地区龙马溪组一段上部页岩气层地质特征及开发潜力[J]. 天然气地球科学, 2020, 31(3): 393-401. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX202003010.htmSHU Zhiheng, FANG Dongliang, ZHENG Aiwei, et al. Geological characteristics and development potential of upper shale gas reservoirs of the 1st member of Longmaxi Formation in Jiaoshiba area, Sichuan Basin[J]. Natural Gas Geoscience, 2020, 31(3): 393-401. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX202003010.htm [12] 李东晖, 刘光祥, 聂海宽, 等. 焦石坝背斜上部气层开发特征及影响因素[J]. 地球科学(中国地质大学学报), 2019, 44(11): 3653-3661. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201911006.htmLI Donghui, LIU Guangxiang, NIE Haikuan, et al. Development characteristics and influencing factors of upper gas reservoir in Jiaoshiba Anticline[J]. Earth Science(Journal of China University of Geosciences), 2019, 44(11): 3653-3661. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201911006.htm [13] 华夏, 梁悦, 安玲仪. 四川焦石坝地区页岩气沉积相带划分[J]. 科技创新导报, 2015, 12(5): 35-36. https://www.cnki.com.cn/Article/CJFDTOTAL-ZXDB201505022.htmHUA Xia, LIANG Yue, AN Lingyi. Division of shale gas sedimentary facies in Jiaoshiba area, Sichuan[J]. Science and Technology Innovation Herald, 2015, 12(5): 35-36. https://www.cnki.com.cn/Article/CJFDTOTAL-ZXDB201505022.htm [14] 梁超, 姜在兴, 杨镱婷, 等. 四川盆地五峰组-龙马溪组页岩岩相及储集空间特征[J]. 石油勘探与开发, 2012, 39(6): 691-698. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201206007.htmLIANG Chao, JIANG Zaixing, YANG Yiting, et al. Characteristics of shale lithofacies and reservoir space of the Wufeng-Longmaxi Formation, Sichuan Basin[J]. Petroleum Exploration and Development, 2012, 39(6): 691-698. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201206007.htm [15] 李卓, 姜振学, 唐相路, 等. 渝东南下志留统龙马溪组页岩岩相特征及其对孔隙结构的控制[J]. 地球科学(中国地质大学学报), 2017, 42(7): 1116-1123. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201707007.htmLI Zhuo, JIANG Zhenxue, TANG Xianglu, et al. Lithofacies characteristics and its effect on pore structure of the marine shale in the Low Silurian Longmaxi Formation, southestern Chongqing[J]. Earth Science(Journal of China University of Geosciences), 2017, 42(2): 1116-1123. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201707007.htm [16] 朱逸青, 王兴志, 冯明友, 等. 川东地区下古生界五峰组-龙马溪组页岩岩相划分及其与储层关系[J]. 岩性油气藏, 2016, 28(5): 59-66. https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201605007.htmZHU Yiqing, WANG Xingzhi, FENG Mingyou, et al. Lithofacies classification and its relationship with reservoir of the Lower Paleozoic Wufeng-Longmaxi formation in the eastern Sichuan Basin[J]. Lithologic Reservoirs, 2016, 28(5): 59-66. https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201605007.htm [17] 王超, 张柏桥, 舒志国, 等. 四川盆地涪陵地区五峰组-龙马溪组海相页岩岩相类型及储层特征[J]. 石油与天然气地质, 2018, 39(3): 485-497. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201803007.htmWANG Chao, ZHANG Boqiao, SHU Zhiguo, et al. Lithofacies types and reservoir characteristics of marine shales of the Wufeng Formation-Longmaxi Formation in Fuling area, the Sichuan Basin[J]. Oil & Gas Geology, 2018, 39(3): 485-497. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201803007.htm [18] 王曦蒙, 刘洛夫, 汪洋, 等. 川南地区龙马溪组页岩岩相对页岩孔隙空间的控制[J]. 石油学报, 2019, 40(10): 1192-1201. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201910005.htmWANG Ximeng, LIU Luofu, WANG Yang, et al. Control of lithofacies on pore space of shale from Longmaxi Formation, southern Sichuan Basin[J]. Acta Petrolei Sinica, 2019, 40(10): 1192-1201. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201910005.htm [19] 白志强. 川西南地区五峰组-龙马溪组页岩特征研究[D]. 成都: 成都理工大学, 2015.BAI Zhiqiang. The study of the shale features of Wufeng Formation-Longmaxi Formation in southwest of Sichuan Basin[D]. Chengdu: Chengdu University of Technology, 2015. [20] 国家能源局. 页岩气藏描述技术规范: NB/T 14001-2015[S]. 北京: 中国电力出版社, 2016.National Energy Administration. Specification of shale gas reservoir description: NB/T 14001-2015[S]. Beijing: China Electric Power Press, 2016. [21] 王进, 包汉勇, 陆亚秋, 等. 涪陵焦石坝地区页岩气赋存特征定量表征及其主控因素[J]. 地球科学(中国地质大学学报), 2019, 44(3): 1001-1011. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201903027.htmWANG Jin, BAO Hanyong, LU Yaqiu, et al. Quantitative characterization and main controlling factors of shale gas occurrence in Jiaoshiba area, Fuling[J]. Earth Science(Journal of China University of Geosciences), 2019, 44(3): 1001-1011. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201903027.htm [22] 唐颖, 李乐忠, 蒋时馨. 页岩储层含气量测井解释方法及其应用研究[J]. 天然气工业, 2014, 34(12): 46-54. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201412009.htmTANG Ying, LI Lezhong, JIANG Shixin. A logging interpretation methodology of gas content in shale reservoirs and its application[J]. Natural Gas Industry, 2014, 34(12): 46-54. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201412009.htm [23] 唐颖, 张金川, 刘珠江, 等. 解吸法测量页岩含气量及其方法的改进[J]. 天然气工业, 2011, 31(10): 108-112. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201110032.htmTANG Ying, ZHANG Jinchuan, LIU Zhujiang, et al. Use and improvement of the desorption method in shale gas content tests[J]. Natural Gas Industry, 2011, 31(10): 108-112. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201110032.htm [24] 万金彬, 何羽飞, 刘淼, 等. 页岩含气量测定及计算方法研究[J]. 测井技术, 2015, 39(6): 756-761. https://www.cnki.com.cn/Article/CJFDTOTAL-CJJS201506019.htmWAN Jinbin, HE Yufei, LIU Miao, et al. Shale gas content mea-surement and calculation method[J]. Well Logging Technology, 2015, 39(6): 756-761. https://www.cnki.com.cn/Article/CJFDTOTAL-CJJS201506019.htm [25] 王建波, 冯明刚, 严伟, 等. 焦石坝地区页岩储层可压裂性影响因素及计算方法[J]. 断块油气田, 2016, 23(2): 216-220. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT201602020.htmWANG Jianbo, FENG Minggang, YAN Wei, et al. Influence factors and evaluation methods for shale reservoir fracability in Jiaoshiba area[J]. Fault-Block Oil & Gas Field, 2016, 23(2): 216-220. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT201602020.htm [26] 唐颖, 邢云, 李乐忠, 等. 页岩储层可压裂性影响因素及评价方法[J]. 地质前缘, 2012, 19(5): 356-363. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT201602020.htmTANG Ying, XING Yun, LI Lezhong, et al. Influence factors and evaluation methods of the gas shale fracability[J]. Earth Science Frontiers, 2012, 19(5): 356-363. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT201602020.htm [27] 孙健, 罗兵. 四川盆地涪陵页岩气田构造变形特征及对含气性的影响[J]. 石油与天然气地质, 2016, 37(6): 809-818. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201606004.htmSUN Jian, LUO Bing. Structural deformation and its influences on gas storage in Fuling Shale Gas Play, the Sichuan Basin[J]. Oil & Gas Geology, 2016, 37(6): 809-818. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201606004.htm [28] 戴方尧, 郝芳, 胡海燕, 等. 川东焦石坝五峰-龙马溪组页岩气赋存机理及其主控因素[J]. 地球科学(中国地质大学学报), 2017, 42(7): 1185-1194. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201707013.htmDAI Fangyao, HAO Fang, HU Haiyan, et al. Occurrence mechanism and key controlling factors of Wufeng-Longmaxi Shale Gas, eastern Sichuan Basin[J]. Earth Science(Journal of China University of Geosciences), 2017, 42(7): 1185-1194. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201707013.htm [29] 姜振学, 唐相路, 李卓, 等. 川东南地区龙马溪组页岩孔隙结构全孔径表征及其对含气性的控制[J]. 地学前缘, 2016, 23(2): 126-134. https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201602015.htmJIANG Zhenxue, TANG Xianglu, LI Zhuo, et al. The whole-aperture pore structure characteristics and its effect on gas content of the Longmaxi Formation shale in the southeastern Sichuan Basin[J]. Earth Science Frontiers, 2016, 23(2): 126-134. https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201602015.htm [30] 蒋裕强, 董大忠, 漆麟, 等. 页岩气储层的基本特征及其评价[J]. 天然气工业, 2010, 30(10): 7-12. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201010004.htmJIANG Yuqiang, DONG Dazhong, QI Lin, et al. Basic features and evaluation of shale gas reservoirs[J]. Natural Gas Industry, 2010, 30(10): 7-12. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201010004.htm [31] 王玉满, 黄金亮, 李新景, 等. 四川盆地下志留统龙马溪组页岩裂缝孔隙定量表征[J]. 天然气工业, 2015, 35(9): 8-15. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201509004.htmWANG Yuman, HUANG Jinliang, LI Xinjing, et al. Quantitative characterization of fractures and pores in shale beds of the Lower Silurian, Longmaxi Formation, Sichuan Basin[J]. Natural Gas Industry, 2015, 35(9): 8-15. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201509004.htm -