Tectonic deformation and its constraints to shale gas accumulation in Nanchuan area, southeastern Sichuan Basin
-
摘要: 南川地区自下古生界海相页岩成气以来，遭受了强烈的构造改造作用，致使页岩气富集规律复杂。为揭示南川地区中新生代构造变形对页岩气富集的制约，通过构造精细解析，以及对演化时序和页岩气富集主控因素的分析，构建了结构模式，恢复了中新生代构造演化过程，厘定了页岩气富集主控因素，进而分析了构造样式与页岩气富集模式的响应关系。研究表明，南川地区整体构造变形自东向西逐渐减弱，存在北段强烈冲断褶皱-断展-断滑、南段强烈冲断褶皱-断滑两种前展式结构模式。中燕山期，主体NE向构造发育，平桥、东胜构造形成，至中燕山期末期，受金佛山隆起以及南川-遵义断层的作用，南段发生构造叠加与改造，早期NE向构造演化为北倾单斜，并在南川-遵义断层东侧发育近南北向阳春沟背斜。受差异构造变形作用，北段断褶带发育背斜型富页岩气构造样式，外缘带为单斜型构造样式，而南段构造叠加带则发育单斜型和背斜型构造样式。页岩气整体保存条件受构造变形方式制约，北段页岩气保存条件由东向西逐渐变好，而南段页岩气保存条件较为复杂，其中北段的低角度单斜、宽缓背斜、较宽缓背斜3类构造样式为有利的页岩气富集构造。Abstract: Since the gas generation of Lower Paleozoic marine shale, it has suffered from strong structural transformation, resulting in complex enrichment law of shale gas in Nanchuan area. In order to reveal the constraints of Mesozoic and Cenozoic tectonic deformation to shale gas enrichment, through fine structural analysis, and the analysis of evolution time series, and main controlling factors of shale gas enrichment, the structural model is constructed, the Mesozoic and Cenozoic tectonic evolution process is restored, the main controlling factors of shale gas enrichment are determined, and then the response relationship between structural style and shale gas enrichment model is analyzed. The study shows that the tectonic deformation strength gradually weakens from east to west in Nanchuan area, and there are two propagation structural modes: strong thrust fold-break-slip in the northern section and strong thrust fold-break slip in the south ones.In the middle Yanshan period, the main NE trending structures were developed, and Pingqiao and Dongsheng structures were formed in the time. At the end of the middle Yanshan period, due to Jinfoshan uplift and Nanchuan-Zunyi fault, the southern section underwent structural superposition and transformation. The early NE trending structure evolved into a north dipping monocline, and a nearly SN Yangchungou anticline was developed on the east side of Nanchuan-Zunyi fault. Due to differential structural deformation, anticlinal shale gas rich structural style is developed in the fault fold belt, and the shale gas rich structural style is monoclinic in the outer edge belt in the north section, while monoclinic and anticline ones are developed in the structural superposition belt in the southern section. The preservation conditions of shale gas are restricted by the structural deformation mode. The preservation conditions of shale gas gradually become better from east to west in the northern section, while the shale gas ones are more complex in the southern section. Among them, three structural styles such as low angle monocline, wide and gentle anticline and wide and gentle anticline are favorable shale gas enrichment structures in the northern section.
-
Key words:
- shale gas /
- tectonic deformation /
- propagation type structure model /
- preservation /
- enrichment /
- Nanchuan area
-
图 1 南川地区构造图
A.南川地区奥陶系五峰组底面构造图；B.南川及邻区地质图
K2.上白垩统；K1.下白垩统；J3p.蓬莱镇组；J2sn.遂宁组；J2s.沙溪庙组；J2x.新田沟组；J1-2z.自流井组；J1z.珍珠冲组；T3x.须家河组；T2l.雷口坡组；T1j.嘉陵江组；T1d.大冶组；P2.上二叠统；P1.下二叠统；S2lr.罗惹坪组；S1x.小河坝组；S1lm.龙马溪组；O2+3.中上奥陶统；O1d.大湾组；O1f+h.分乡组+红花园组；O1n.南津关组；∈3m.毛田组；∈3g.耿家店组；∈2p.平井组；∈2g.高台组；∈1sl.石龙洞组；∈1t.天河板组；∈1sp.石牌组；Zdn.灯影组Figure 1. Structural map of Nanchuan area
图 2 南川地区SE-NW向地质剖面图(剖面位置见图 1)
J-T3x.侏罗系-须家河组；T2l-P2l.雷口坡组-龙潭组；P1m-S2h.茅口组-韩家店组；S1x-O3w.小河坝组-五峰组；O3l-∈.临湘组-寒武系；An∈.前寒武系
Figure 2. SE-NW geological profile in Nanchuan area
图 4 南川地区中燕山期断层发育演化图
Figure 4. Fault development and evolution map in Middle Yanshanian period in Nanchuan area
-
[1] 何希鹏, 何贵松, 高玉巧, 等. 渝东南盆缘转换带常压页岩气地质特征及富集高产规律[J]. 天然气工业, 2018, 38(12): 1-12. doi: 10.3787/j.issn.1000-0976.2018.12.001He X P, He G S, Gao Y Q, et al. Geological characteristics and enrichment laws of normal-pressure shale gas in the basin-margin transition zone of SE Chongqing[J]. Natural Gas Industry, 2018, 38(12): 1-12(in Chinese with English abstract). doi: 10.3787/j.issn.1000-0976.2018.12.001 [2] 何希鹏, 王运海, 王彦祺, 等. 渝东南盆缘转换带常压页岩气勘探实践[J]. 中国石油勘探, 2020, 25(1): 126-136. doi: 10.3969/j.issn.1672-7703.2020.01.012He X P, Wang Y H, Wang Y Q, et al. Exploration practices of normal-pressure shale gas in the marginal transition zone of the southeast Chongqing Basin[J]. China Petroleum Exploration, 2020, 25(1): 126-136(in Chinese with English abstract). doi: 10.3969/j.issn.1672-7703.2020.01.012 [3] 魏祥峰, 刘珠江, 王强, 等. 川东南丁山与焦石坝地区五峰组-龙马溪组页岩气富集条件差异分析与思考[J]. 天然气地球科学, 2020, 31(8): 1041-1051. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX202008001.htmWei X F, Liu Z J, Wang Q, et al. Analysis and thinking of the difference of Wufeng-Longmaxi shale gas enrichment conditions between Dingshan and Jiaoshiba areas in southeastern Sichuan Basin[J]. Natural Gas Geoscience, 2020, 31(8): 1041-1051(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX202008001.htm [4] Guo T L. Evaluation of highly thermally mature shale-gas reservoirs in complex structural parts of the Sichuan Basin[J]. Journal of Earth Science, 2013, 24(6): 863-873. doi: 10.1007/s12583-013-0384-4 [5] 郭卫星, 唐建明, 欧阳嘉穗, 等. 四川盆地南部构造变形特征及其与页岩气保存条件的关系[J]. 天然气工业, 2021, 41(5): 11-19. doi: 10.3787/j.issn.1000-0976.2021.05.002Guo W X, Tang J M, Oyang J H, et al. Characteristics of structural deformation in the southern Sichuan Basin and its relationship with the storage condition of shale gas[J]. Natural Gas Industry, 2021, 41(5): 11-19(in Chinese with English abstract). doi: 10.3787/j.issn.1000-0976.2021.05.002 [6] 何贵松, 何希鹏, 高玉巧, 等. 渝东南盆缘转换带金佛斜坡常压页岩气富集模式[J]. 天然气工业, 2020, 40(6): 50-60. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG202006007.htmHe G S, He X P, Gao Y Q, et al. Enrichment model of normal-pressure shale gas in the Jinfo slope of the basin-margin transition zone in southeast Chongqing[J]. Natural Gas Industry, 2020, 40(6): 50-60(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG202006007.htm [7] 庹秀松, 陈孔全, 罗顺社, 等. 四川盆地东南缘齐岳山断裂构造特征与页岩气保存条件[J]. 石油与天然气地质, 2020, 41(5): 1017-1024. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT202005013.htmTuo X S, Chen K Q, Luo S S, et al. Structural characteristics of Qiyueshan fault and shale gas preservation at the southeastern margin of Sichuan Basin[J]. Oil & Gas Geology, 2020, 41(5): 1017-1024(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT202005013.htm [8] 魏峰, 陈孔全, 庹秀松. 川东齐岳山断层北部差异构造变形特征[J]. 石油实验地质, 2019, 41(3): 348-354. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD201903008.htmWei F, Chen K Q, Tuo X S. Differential tectonic deformation in the northern Qiyueshan fault, eastern Sichuan Basin[J]. Petroleum Geology & Experiment, 2019, 41(3): 348-354(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD201903008.htm [9] Tang Y, Yang F, Lü Q Q, et al. Analysis of the tectonic stress field of SE Sichuan and its impact on the preservation of shale gas in Lower Silurian Longmaxi Formation of the Dingshan region, China[J]. Journal of the Geological Society of India, 2018, 92(5): 92-100. doi: 10.1007/s12594-018-0957-z [10] 周立夫, 陈孔全, 唐永, 等. 川南綦江-赤水地区晚燕山期以来差异构造变形[J]. 地质科技情报, 2016, 35(4): 66-73. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201604011.htmZhou L F, Chen K Q, Tang Y, et al. Tectonic deformation in Qijiang-Chishui area of south Sichuan since Late Yanshanian[J]. Geological Science and Technology Information, 2016, 35(4): 66-73(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201604011.htm [11] 梅廉夫, 刘昭茜, 汤济广, 等. 湘鄂西-川东中生代陆内递进扩展变形: 来自裂变径迹和平衡剖面的证据[J]. 地球科学: 中国地质大学学报, 2010, 35(2): 161-174. doi: 10.3969/j.issn.1672-6561.2010.02.008Mei L F, Liu Z Q, Tang J G, et al. Mesozoic intra-continental progressive deformation in western Hunan-Hubei-eastern Sichuan Provinces of China: Evidence from apatite fission track and balanced cross-section[J]. Earth Science: Journal of China University of Geosciences, 2010, 35(2): 161-174(in Chinese with English abstract). doi: 10.3969/j.issn.1672-6561.2010.02.008 [12] 邢翔, 王文希. 四川盆地东南缘富页岩气构造类型及保存主控因素[J]. 东北石油大学学报, 2020, 44(2): 1-10. doi: 10.3969/j.issn.2095-4107.2020.02.001Xing X, Wang W X. Type and main controlling factor for preservation of rich shale gas structure in southeast margins of the Sichuan Basin[J]. Journal of Northeast Petroleum University, 2020, 44(2): 1-10(in Chinese with English abstract). doi: 10.3969/j.issn.2095-4107.2020.02.001 [13] 陈孔全, 张斗中, 庹秀松. 中扬子地块西部地区结构构造与页岩气保存条件的关系[J]. 天然气工业, 2020, 40(4): 9-19. doi: 10.3787/j.issn.1000-0976.2020.04.002Chen K Q, Zhang D Z, Tuo X S. Relationship between geological structure and marine shale gas preservation conditions in the western Middle Yangtze Block[J]. Natural Gas Industry, 2020, 40(4): 9-19(in Chinese with English abstract). doi: 10.3787/j.issn.1000-0976.2020.04.002 [14] 胡东风, 张汉荣, 倪楷, 等. 四川盆地东南缘海相页岩气保存条件及其主控因素[J]. 天然气工业, 2014, 34(6): 17-23. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201406003.htmHu D F, Zhang H R, Ni K, et al. Main controlling factors for gas preservation conditions of marine shales in southeastern margins of the Sichuan Basin[J]. Natural Gas Industry, 2014, 34(6): 17-23(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201406003.htm [15] 郭旭升. 南方海相页岩气"二元富集"规律: 四川盆地及周缘龙马溪组页岩气勘探实践认识[J]. 地质学报, 2014, 88(7): 1209-1218. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201407001.htmGuo X S. Rules of two-factor enrichiment for marine shale gas in southern China[J]. Acta Geologica Sinica, 2014, 88(7): 1209-1218(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201407001.htm [16] Hao F, Zou H Y, Lu Y C. Mechanisms of shale gas storage: Implications for shale gas exploration in China[J]. AAPG Bulletin, 2013, 97(8): 1325-1346. doi: 10.1306/02141312091 [17] 聂海宽, 包书景, 高波, 等. 四川盆地及其周缘下古生界页岩气保存条件研究[J]. 地学前缘, 2012, 19(3): 280-294. https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201203030.htmNie H K, Bao S J, Gao B, et al. A study of shale gas preservation conditions for the Lower Paleozoic in Sichuan Basin and its periphery[J]. Earth Science Frontiers, 2012, 19(3): 280-294(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201203030.htm [18] 汤济广, 李豫, 汪凯明, 等. 四川盆地东南地区龙马溪组页岩气有效保存区综合评价[J]. 天然气工业, 2015, 35(5): 15-23. doi: 10.3787/j.issn.1000-0976.2015.05.003Tang J G, Li Y, Wang K M, et al. Comprehensive evaluation shale of effective preservation zone of Longmaxi Formation gas in the southeast Sichuan Basin[J]. Natural Gas Industry, 2015, 35(5): 15-23(in Chinese with English abstract). doi: 10.3787/j.issn.1000-0976.2015.05.003 [19] 邹才能, 董大忠, 王玉满, 等. 中国页岩气特征、挑战及前景(一)[J]. 石油勘探与开发, 2015, 42(6): 689-701. doi: 10.11698/PED.2015.06.01Zou C N, Dong D Z, Wang Y M, et al. Shale gas in China: Characteristics, challenges and prospects(Ⅰ)[J]. Petroleum Exploration and Development, 2015, 42(6): 689-701(in Chinese with English abstract). doi: 10.11698/PED.2015.06.01 [20] 魏志红. 四川盆地及其周缘五峰组-龙马溪组页岩气的晚期逸散[J]. 石油与天然气地质, 2015, 36(4): 659-665. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201504017.htmWei Z H. Late fugitive emission of shale gas from Wufeng-Longmaxi Formation in Sichuan Basin and its periphery[J]. Oil & Gas Geology, 2015, 36(4): 659-665(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201504017.htm [21] Liu J S, Ding W L, Wang R Y, et al. Simulation of paleotectonic stress fields and quantitative prediction of multi-period fractures in shale reservoirs: A case study of the Niutitang Formation in the Lower Cambrian in the Cen'gong Block, South China[J]. Marine and Petroleum Geology, 2017, 84(6): 289-310. http://www.sciencedirect.com/science/article/pii/S0264817217301356 [22] Feng W P, Wang F Y, Guan J, et al. Geologic structure controls on initial productions of Lower Silurian Longmaxi shale in South China[J]. Marine and Petroleum Geology, 2018, 91(1): 163-178. http://www.onacademic.com/detail/journal_1000040184718310_0adb.html [23] Ma Y, Ardakani O H, Zhong N G, et al. Possible pore structure deformation effects on the shale gas enrichment: Anexample from the Lower Cambrian shales of the eastern Upper Yangtze Platform, South China[J]. International Journal of Coal Geology, 2020, 217: 1-22. [24] 闫剑飞. 黔北地区上奥陶统五峰组-下志留统龙马溪组黑色岩系页岩气富集条件与分布特征[D]. 成都: 成都理工大学, 2016.Yan J F. The shale gas accumulation conditions and distribution characteristic of black shales in the Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation of northern Guizhou[D]. Chengdu: Chengdu University of Technology, 2016(in Chinese with English abstract). [25] 王平, 刘少峰, 郜瑭珺, 等. 川东弧形带三维构造扩展的AFT记录[J]. 地球物理学报, 2012, 55(5): 1662-1673. https://www.cnki.com.cn/Article/CJFDTOTAL-DQWX201205024.htmWang P, Liu S F, Gao T J, et al. Cretaceous transportation of eastern Sichuan arcuate fold belt in three dimensions: Insights from AFT analysis[J]. Chinese J. Geophys., 2012, 55(5): 1662-1673(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DQWX201205024.htm [26] 杨武年, 乐光禹, 杜思清, 等. 金佛山菱形构造格局区域变形场和应力场遥感图像解析[J]. 成都理工学院学报, 1994, 21(1): 99-106. https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG401.013.htmYang W N, Le G Y, Du S Q, et al. Remote sensing image analysis for deformative field and stress fields of the Jinfoshan rhomb-structure -pattern in the contiguous zone of eastern Sichuan and northern Guizhou[J]. Journal of Chengdu University of Technology, 1994, 21(1): 99-106(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG401.013.htm [27] 包汉勇, 张柏桥, 曾联波, 等. 华南地区海相页岩气差异富集构造模式[J]. 地球科学, 2019, 44(3): 993-1000. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201903026.htmBao H Y, Zhang B Q, Zeng L B, et al. Marine shale gas differential enrichment structure models in South China[J]. Earth Science, 2019, 44(3): 993-1000(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201903026.htm [28] 何顺, 秦启荣, 周吉羚, 等. 川东南DS地区龙马溪组页岩裂缝发育特征及期次解析[J]. 地质科技情报, 2019, 38(2): 101-109. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201902012.htmHe S, Qin Q R, Zhou J L, et al. Shale fracture characteristics and its application of the Longmaxi Formation in DS area, southeast Sichuan[J]. Geological Science and Technology Information, 2019, 38(2): 101-109(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201902012.htm [29] Ge X, Hu W S, Ma Y S, et al. Quantitative evaluation of geological conditions for shale gas preservation based on vertical and lateral constraints in the Songkan area, northern Guizhou, southern China[J]. Marine and Petroleum Geology, 2021, 124(2): 1-13. http://www.sciencedirect.com/science/article/pii/s0264817220305705 [30] 谭淋耘, 徐铫, 李大华, 等. 页岩气成藏主控因素与成藏模式研究: 以渝东南地区五峰组-龙马溪组为例[J]. 地质科技情报, 2015, 34(3): 126-132. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201503017.htmTan L Y, Xu D, Li D H, et al. Research on the main control factors and models for shale gas accumulation: A case study of Wufeng and Longmaxi Formations in southeastern Chongqing[J]. Geological Science and Technology Information, 2015, 34(3): 126-132(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201503017.htm -
下载:
点击查看大图
图(6)
计量
- 文章访问数: 1177
- PDF下载量: 479
- 被引次数: 0
