The structural evolution of the middle section of the West Sichuan Depression in the Sichuan Basin controlled the hydrocarbon accumulation in the Middle Triassic Leikoupo Formation
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摘要: 中三叠统雷口坡组在四川盆地川西坳陷中段的金马—鸭子河构造提交探明储量千亿立方米，新场、马井地区同样也获得了工业气流并提交控制、预测储量，但区内构造演化过程及油气成藏配置关系还不明确。通过对周缘露头、盆地内钻井样品的镜质体反射率、扫描电镜及流体包裹体等分析，并结合构造解释，明确了川西坳陷中段的局部构造最早形成于印支早期，对雷口坡组油气成藏起关键作用的构造演化时期为早—中侏罗世；通源断层或“接力式”断层输导系统可作为良好的天然气运移通道，有利于油气富集成藏；局部古构造高点以及储层、输导系统等关键成藏要素配置关系良好且后期构造形变破坏弱的地区为最有利勘探区。Abstract: The Middle Triassic Leikoupo Formation of Jinma-Yazihe structure in the middle section of Western Sichuan Depression has submitted over 100 billion cubic meters of proved natural gas reserves. An industrial gas flow has also been obtained in Xinchang and Majing area, and the controlled and predicted reserves have been submitted. However, the relationship between structural evolution process and hydrocarbon accumulation configuration is still unclear. Through the analysis of vitrinite reflectance, scanning electron microscopic observation, analysis of fluid inclusion of peripheral outcrop and drilling samples, and combined with structural interpretation, the following results have been indicated. It is clear that the local structure in the middle section of Western Sichuan Depression was formed in the early Indosinian, and the Early-Middle Jurassic was a critical tectonic evolution period for hydrocarbon accumulation in the Leikoupo Formation. Meanwhile, the faults connected to sources or "contact" fault migration system provided pathways for natural gas migration, which was conducive for hydrocarbon enrichment. The local paleo-structural high points with a good configuration of key accumulation factors such as reservoirs and transport systems and weak structural deformation are the most favorable exploration area.
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图 2 龙门山前金马—鸭子河构造地震剖面
剖面位置见图 1。
Figure 2. Seismic profile of Jinma-Yazihe structure in Longmen Mountain front, western Sichuan Basin
图 3 四川盆地川西坳陷新场构造地震剖面
剖面位置见图 1。
Figure 3. Seismic profile of Xinchang structure, Western Sichuan Depression, Sichuan Basin
图 4 四川盆地川西坳陷马井构造地震剖面
剖面位置见图 1。
Figure 4. Seismic profile of Majin structure, Western Sichuan Depression, Sichuan Basin
图 5 龙门山前金马—鸭子河构造演化过程
Figure 5. Tectonic evolution of Jinma-Yazihe structure, Longmen Mountain front, western Sichuan Basin
图 6 四川盆地川西坳陷晚三叠世—中侏罗世沉积地层厚度平面分布
Figure 6. Plane distribution of sedimentary thickness of Late Triassic to Middle Jurassic in West Sichuan Depression, Sichuan Basin
图 7 四川盆地川西坳陷雷口坡组气藏气源断层输导样式
Figure 7. Faults directly or indirectly connected to gas sources in Leikoupo Formation, Western Sichuan Depression, Sichuan Basin
图 8 四川盆地川西坳陷雷口坡组热液矿物扫描电镜及能谱分析
Figure 8. SEM and energy spectrum analysis of hydrothermal minerals in Leikoupo Formation, Western Sichuan Depression, Sichuan Basin
图 9 川西地区新场、金马—鸭子河构造雷口坡组包裹体均一温度及主成藏期分布
Figure 9. Homogenization temperatures of inclusions in Leikoupo Formation and main accumulation stages of Xinchang and Jinma-Yazihe structures, western Sichuan
表 1 川西地区二叠系露头样品镜质体反射率Ro测试数据统计
Table 1. Ro test data of Permian outcrop samples, western Sichuan
样品编号 岩性 剖面位置 层位 Ro/% Rb/%1) 测点数量 自然演化序列Ro/%2) M12 灰岩 上寺 P2m 0.86 32 0.90 JP30 灰岩 江油—平武 P2m 0.58 22 0.72 SD30 灰岩 什邡—金河 P2m 0.85 26 0.90 SD31 灰岩 什邡—金河 P2m 0.79 14 0.86 BP-23 灰岩 宝兴—大邑 P2m 5.35 31 3.85 BP-34 灰岩 宝兴—大邑 P2m 4.73 26 3.44 DP-12 灰岩 宝兴—大邑 P2m 2.10 14 1.72 JP27 泥岩 江油—平武 P2m 0.46 21 0.64 JP33 生物泥灰岩 江油—平武 P2m 0.54 26 0.69 JP34 生物泥灰岩 江油—平武 P2m 0.85 4 0.85 JP35 生物泥灰岩 江油—平武 P2m 0.57 11 0.71 M10 灰岩 上寺 P2q 0.75 21 0.83 DP3 灰岩 宝兴—大邑 P2q 2.27 23 1.83 DP-8 灰岩 宝兴—大邑 P2q 2.10 20 1.72 BP-13 灰岩 宝兴—大邑 P2q 5.04 18 3.65 JP15 泥灰岩 江油—平武 P2q 0.67 50 0.78 SP-D20 生物灰岩 什邡—金河 P2q 0.98 13 0.98 JJP2 碳质泥灰岩 江油—平武 P2q 0.51 23 0.67 JJP1 碳质页岩 江油—平武 P2q 0.70 16 0.70 TK-8 深灰色白云质灰岩 北川—通口 P2q 0.76 16 0.84 TK-11 灰黑色灰岩 北川—通口 P2q 0.84 23 0.89 TCX-3 灰黑色碳质泥岩 天池乡 P3l 0.79 17 0.85 SD50+1 灰岩 什邡—金河 P3l 0.95 31 0.96 SD74 灰岩 什邡—金河 P3l 0.87 50 0.91 DP-24 灰岩 宝兴—大邑 P3l 1.79 13 1.79 M5 煤 上寺 P3l 0.65 50 0.77 M14 泥灰岩 上寺 P3l 0.69 50 0.79 JP46 泥岩 江油—平武 P3l 0.80 15 0.86 JP51 生物灰岩 江油—平武 P3l 0.58 17 0.72 SD73 生物灰岩 什邡—金河 P3l 0.87 50 0.91 BP-42 碳质灰岩 宝兴—大邑 P3l 5.07 15 3.67 BP-44 碳质灰岩 宝兴—大邑 P3l 5.16 15 3.72 M6 碳质泥岩 上寺 P3l 0.66 50 0.66 SD60 碳质页岩 什邡—金河 P3l 1.01 50 1.01 SD61 碳质页岩 什邡—金河 P3l 1.11 50 1.11 1)Rb为沥青反射率；2) 自然演化序列Ro=0.656 9Rb+0.336 4，计算公式参考丰国秀等[11]。 
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[1] 沈安江, 周进高, 辛勇光, 等. 四川盆地雷口坡组白云岩储层类型及成因[J]. 海相油气地质, 2008, 13(4): 19-28. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ200804009.htmSHEN Anjiang, ZHOU Jingao, XIN Yongguang, et al. Origin of Triassic Leikoupo dolostone reservoirs in Sichuan Basin[J]. Marine Origin Petroleum Geology, 2008, 13(4): 19-28. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ200804009.htm [2] 杨光, 石学文, 黄东, 等. 四川盆地龙岗气田雷四3亚段风化壳气藏特征及其主控因素[J]. 天然气工业, 2014, 34(9): 17-24. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201409005.htmYANG Guang, SHI Xuewen, HUANG Dong, et al. Characteristics and major controls of weathering crust gas reservoirs in T2l43 in the Longgang Gas Field, Sichuan Basin[J]. Natural Gas Industry, 2014, 34(9): 17-24. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201409005.htm [3] 王顺玉, 戴鸿鸣, 王廷栋, 等. 磨溪气田高成熟天然气的气源与运移[J]. 中国石油勘探, 1998, 3(2): 5-8. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY199802002.htmWANG Shunyu, DAI Hongming, WANG Tingdong, et al. Gas source and migration of high-mature natural gas in Moxi gas field[J]. China Petroleum Exploration, 1998, 3(2): 5-8. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY199802002.htm [4] 金文正, 万桂梅, 崔泽宏, 等. 四川盆地关键构造变革期与陆相油气成藏期次[J]. 断块油气田, 2012, 19(3): 273-277. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT201203003.htmJIN Wenzheng, WAN Guimei, CUI Zehong, et al. Key tectonic change epoch and hydrocarbon accumulation periods of continental clastic reservoir in Sichuan Basin[J]. Fault-Block Oil & Gas Field, 2012, 19(3): 273-277. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT201203003.htm [5] 冯动军, 朱彤, 李宏涛. 川西海相雷口坡组成藏地质特征及控制因素[J]. 西安石油大学学报(自然科学版), 2013, 28(6): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-XASY201306002.htmFENG Dongjun, ZHU Tong, LI Hongtao. Geological features and control factors of reservoir forming in middle Triassic Leikoupo Formation in western Sichuan Basin[J]. Journal of Xi'an Shiyou University (Natural Science Edition), 2013, 28(6): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-XASY201306002.htm [6] 李智武, 刘树根, 林杰, 等. 川西坳陷构造格局及其成因机制[J]. 成都理工大学学报(自然科学版), 2009, 36(6): 645-653. https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG200906011.htmLI Zhiwu, LIU Shugen, LIN Jie, et al. Structural configuration and its genetic mechanism of the West Sichuan depression in China[J]. Journal of Chengdu University of Technology (Science & Technology Edition), 2009, 36(6): 645-653. https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG200906011.htm [7] 李书兵, 许国明, 宋晓波. 川西龙门山前构造带彭州雷口坡组大型气田的形成条件[J]. 中国石油勘探, 2016, 21(3): 74-82. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201603007.htmLI Shubing, XU Guoming, SONG Xiaobo. Forming conditions of Pengzhou large gas field of Leikoupo Formation in Longmenshan piedmont tectonic belt, western Sichuan Basin[J]. China Petroleum Exploration, 2016, 21(3): 74-82. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201603007.htm [8] 宋晓波, 刘诗荣, 王琼仙, 等. 川西坳陷西缘中下三叠统油气成藏主控因素[J]. 岩性油气藏, 2011, 23(1): 67-73. https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201101014.htmSONG Xiaobo, LIU Shirong, WANG Qiongxian, et al. Main controlling factors of hydrocarbon accumulation of Middle-Lower Triassic in western margin of Western Sichuan Depression[J]. Lithologic Reservoirs, 2011, 23(1): 67-73. https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201101014.htm [9] 于福生, 王彦华, 李晓剑, 等. 川西坳陷孝泉-丰谷构造带变形特征及成因机制模拟[J]. 地球科学与环境学报, 2011, 33(1): 45-53. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGX201101009.htmYU Fusheng, WANG Yanhua, LI Xiaojian, et al. Deformation characteristics and genetic simulation of Xiaoquan-Fenggu structural belt in West Sichuan Depression[J]. Journal of Earth Sciences and Environment, 2011, 33(1): 45-53. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGX201101009.htm [10] 杨克明, 朱宏权, 叶军, 等. 川西致密砂岩气藏地质特征[M]. 北京: 科学出版社, 2012.YANG Keming, ZHU Hongquan, YE Jun, et al. Geological characteristics of tight sandstone gas reservoirs in west Sichuan Basin[M]. Beijing: Science Press, 2012. [11] 丰国秀, 陈盛吉. 岩石中沥青反射率与镜质体反射率之间的关系[J]. 天然气工业, 1988, 8(8): 20-25. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG198803006.htmFENG Guoxiu, CHEN Shengji. Relationship between the reflectance of bitumen and vitrinite in rock[J]. Natural Gas Industry, 1988, 8(8): 20-25. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG198803006.htm [12] 邓康龄. 龙门山构造带印支期构造递进变形与变形时序[J]. 石油与天然气地质, 2007, 28(4): 485-490. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200704011.htmDENG Kangling. Indosinian progressive deformation and its chronogenesis in Longmengshan structural belt[J]. Oil & Gas Geology, 2007, 28(4): 485-490. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200704011.htm [13] 曹烈, 安凤山, 王信. 川西坳陷须家河组气藏与古构造关系[J]. 石油与天然气地质, 2005, 26(2): 224-229. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200502016.htmCAO Lie, AN Fengshan, WANG Xin. Relationship between palaeostructure and gas reservoirs in Xujiahe Formation in Western Sichuan Depression[J]. Oil & Gas Geology, 2005, 26(2): 224-229. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200502016.htm [14] 袁晓宇, 胡烨, 刘光祥, 等. 川西坳陷印支期古隆起成因初探[J]. 海相油气地质, 2020, 25(1): 63-69. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ202001007.htmYUAN Xiaoyu, HU Ye, LIU Guangxiang, et al. A preliminary research on the genesis of Indosinian palaeo-uplift in the Western Sichuan Depression[J]. Marine Origin Petroleum Geology, 2020, 25(1): 63-69. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ202001007.htm [15] 胡烨, 袁晓宇, 王彦青, 等. 四川盆地川西坳陷印支早期古隆起发育特征及控油气作用[J]. 石油实验地质, 2018, 40(5): 650-654. doi: 10.11781/sysydz201805650HU Ye, YUAN Xiaoyu, WANG Yanqing, et al. Developmental characteristics and oil control of Indosinian paleo-uplifts in West Sichuan Depression, Sichuan Basin[J]. Petroleum Geology & Experiment, 2018, 40(5): 650-654. doi: 10.11781/sysydz201805650 [16] 梁世友, 陈迎宾, 赵国伟, 等. 四川盆地川西坳陷雷口坡组四段稀土元素地球化学特征及意义[J]. 石油实验地质, 2017, 39(1): 94-98. doi: 10.11781/sysydz201701094LIANG Shiyou, CHEN Yingbin, ZHAO Guowei, et al. Geochemical characteristics of rare earth elements and their geological significance in the fourth member of the Middle Triassic Leikoupo Formation in western Sichuan Basin[J]. Petroleum Geology & Experiment, 2017, 39(1): 94-98. doi: 10.11781/sysydz201701094 [17] 许国明, 宋晓波, 冯霞, 等. 川西地区中三叠统雷口坡组天然气勘探潜力[J]. 天然气工业, 2013, 33(8): 8-14. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201308003.htmXU Guoming, SONG Xiaobo, FENG Xia, et al. Gas potential of the Middle Triassic Leikoupo Fm in the western Sichuan Basin[J]. Natural Gas Industry, 2013, 33(8): 8-14. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201308003.htm -
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