四川盆地西部下侏罗统珍珠冲段沉积体系特征及控制作用

Characteristics and control effect of the sedimentary system of Lower Jurassic Zhenzhuchong Member in Western Sichuan Basin

摘要

四川盆地西部（川西）珍珠冲段纵向紧邻须家河组生烃中心，为非常规致密油气勘探的潜力层系。根据露头、岩心、钻测井及二维地震等资料，恢复珍珠冲段古地貌，明确沉积体系类型、展布特征，分析古地貌对沉积体系的控制作用。结果表明：川西珍珠冲段沉积期整体为西高东低的古地貌格局，具有古沟谷、古斜坡及古残丘 3 种古地貌单元。川西北部、中部和南部沉积体系类型差异明显，其中，川西北部龙门山构造活动强烈、物源供给充足，发育以砾石为主的扇三角洲沉积；川西中部龙门山构造活动减弱，发育近源的冲积扇—辨状河三角洲沉积；川西南部龙门山处于构造活动相对宁静期，发育以细砂岩为主的曲流河三角洲沉积；湖泊沉积体系广泛分布于川西、川北坳陷带。古地貌控制沉积物可容空间，影响沉积物堆积部位，决定四川盆地西部珍珠冲段沉积体系类型及展布特征。该结果为四川盆地陆相致密气勘探提供指导。

Abstract

The Zhenzhuchong Member is vertically adjacent to the hydrocarbon generating center of Xujiahe Formation in Western Sichuan Basin which is a potential layer for unconventional tight oil and gas exploration. Based on the analysis of 2D lattice profile, outcrop, core data, drilling and logging data, the palaeogeomorphology of Zhenzhuchong Member was restored, and the type and control effect of sedimentary system of Zhenzhuchong Member were defined. The results show that the Zhenzhuchong Member in Western Sichuan has a paleogeomorphic pattern of high in the west and low in the east, with three palaeo-geomorphic units: palaeo-gully, palaeo-slope and palaeo-remnant hill. The types of sedimentary systems in northwestern, central and southern Sichuan Basin are obviously different. Among them, due to the strong tectonic activity and abundant source supply of Longmenshan, fan delta sedimentary mainly composed of gravel was developed in northwest Sichuan Basin. The Longmenshan tectonic activity is weakened in the central part of Western Sichuan Basin, and proximal alluvial fan-braided river delta deposits are developed. In the relatively quiet period of Longmenshan tectonic activity in southwest Sichuan Basin, meander river delta sediments mainly composed of fine sandstone were developed. Lacustrine sedimentary systems are widely distributed in the west and north Sichuan depressions. The palaeogeomorphology control the sediment space, affect the sediment transport path and accumulation location, and then determine the type and distribution of sedimentary system in the Zhenzhuchong Member of the Western Sichuan Basin. This result is of guiding significance for the exploration of continental tight gas in the Sichuan Basin.

关键词

沉积体系 / 古地貌 / 控制作用 / 珍珠冲段 / 下侏罗统 / 四川盆地西部

Key words

sedimentary system / palaeogeomorphology landform / control effect / Zhenzhuchong Member / Lower Jurassic / Western Sichuan Basin

参考文献

[1] 文龙, 罗冰, 王小娟, 等. 四川盆地陆相致密油气勘探新领域及资源潜力[J]. 石油学报, 2025, 46(1):77-88.

[2] WEN Long, LUO Bing, WANG Xiaojuan, et al. New exploration fields and resource potential of continental tight oil and gas in Sichuan Basin[J]. Acta Petrolei Sinica, 2025, 46(1):77-88.

[3] 梁狄刚, 冉隆辉, 戴弹申, 等. 四川盆地中北部侏罗系大面积非常规石油勘探潜力的再认识[J]. 石油学报, 2011, 32(1):8-17.

[4] LIANG Digang, RAN Longhui, DAI Tanshen, et al. A re-recognition of the prospecting potential of Jurassic large-area and non-conventional oils in the Central-Northern Sichuan Basin[J]. Acta Petrolei Sinica, 2011, 32(1):8-17.

[5] 孙龙德, 邹才能, 贾爱林, 等. 中国致密油气发展特征与方向[J]. 石油勘探与开发, 2019, 46(6):1015-1026.

[6] SUN Longde, ZOU Caineng, JIA Ailin, et al. Development characteristics and orientation of tight oil and gas in China[J]. Petroleum Exploration and Development, 2019, 46(6):1015-1026.

[7] 刘忠群, 徐士林, 刘君龙, 等. 四川盆地川西坳陷深层致密砂岩气藏富集规律[J]. 天然气工业, 2020, 40(2):31-40.

[8] LIU Zhongqun, XU Shilin, LIU Junlong, et al. Enrichment laws of deep tight sandstone gas reservoirs in the Western Sichuan Depression,Sichuan Basin[J]. Natural Gas Industry, 2020, 40(2):31-40.

[9] 廖群山, 胡华, 林建平, 等. 四川盆地川中侏罗系致密储层石油勘探前景[J]. 石油与天然气地质, 2011, 32(6):815-822.

[10] LIAO Qunshan, HU Hua, LIN Jianping, et al. Petroleum exploration prospect of the Jurassic tight reservoirs in Central Sichuan Basin[J]. Oil & Gas Geology, 2011, 32(6):815-822.

[11] 曹正林, 张本健, 杨荣军, 等. 川西地区上三叠统须家河组全油气系统成藏模式新认识[J]. 天然气工业, 2023, 43(11):40-53.

[12] CAO Zhenglin, ZHANG Benjian, YANG Rongjun, et al. New understanding of hydrocarbon accumulation model in whole petroleum system of the Upper Trassic Xujiahe Formation in the Western Sichuan Basin[J]. Natural Gas Industry, 2023, 43(11):40-53.

[13] 何江, 胡欣, 张本健, 等. 四川盆地西北部下侏罗统白田坝组沉积体系[J]. 石油实验地质, 2013, 35(5):515-522.

[14] HE Jiang, HU Xin, ZHANG Benjian, et al. Depositional system of Lower Jurassic Baitianba Formation in Northwestern Sichuan Basin[J]. Petroleum Geology & Experiment, 2013, 35(5):515-522.

[15] 徐昌海. 四川盆地北部地区珍珠冲段砂砾岩沉积体系及有利储层预测[D]. 成都: 西南石油大学,2012:37-53.

[16] XU Changhai. Sand conglomerate sedimentary system and favorable reservoir prediction in the Zhenzhuchong Member of Northern Sichuan Basin[D]. Chengdu: Southwest Petroleum University,2012:37-53.

[17] 江文剑, 侯明才, 马华灵, 等. 川西北九龙山地区下侏罗统自流井组珍珠冲段沉积相研究[J]. 地质力学学报, 2014, 20(1):48-60.

[18] JIANG Wenjian, HOU Mingcai, MA Hualing, et al. Research on sedimentary facies of the Zhenzhuchong Segment in the Lower Jurassic Ziliujing Formation in Jiulongshan Region,Northwest Sichuan Basin[J]. Journal of Geomechanics, 2014, 20(1):48-60.

[19] 赵霞飞, 龚昌明, 张闻林, 等. 川中东北部须家河组与珍珠冲段地层划分[J]. 沉积学报, 2011, 29(4):631-643.

[20] ZHAO Xiafei, GONG Changming, ZHANG Wenlin, et al. Stratigraphic division between Xujiahe Formation and Zhenzhuchong Member in the NE part of Central Sichuan Basin[J]. Acta Sedimentologica Sinica, 2011, 29(4):631-643.

[21] 何逢阳. 川中地区须家河组与珍珠冲段地层沉积特征与划分对比研究[D]. 成都: 成都理工大学,2010:63-77.

[22] HE Fengyang. Comparative study on the sedimentary features and stratigraphic correlation of Xujiahe Formation and Zhenzhuchong Member strata in middle of Sichuan Basin[D]. Chengdu: Chengdu University of Technology,2010:63-77.

[23] 李英强, 何登发. 四川盆地及邻区早侏罗世构造一沉积环境与原型盆地演化[J]. 石油学报, 2014, 35(2):219-232.

[24] LI Yingqiang, HE Dengfa. Evolution of tectonic-depositional environment and prototype basins of the Early Jurassic in Sichuan Basin and adjacent areas[J]. Acta Petrolei Sinica, 2014, 35(2):219-232.

[25] 刘君龙, 纪友亮, 张克银, 等. 川西前陆盆地侏罗系沉积体系变迁及演化模式[J]. 石油学报, 2016, 37(6):743-756.

[26] LIU Junlong, JI Youliang, ZHANG Keyin, et al. Jurassic sedimentary system transition and evolution model in Western Sichuan Foreland Basin[J]. Acta Petrolei Sinica, 2016, 37(6):743-756.

[27] 朱志军, 陈洪德, 胡晓强, 等. 川西前陆盆地侏罗纪层序地层格架、沉积体系配置及演化[J]. 沉积学报, 2010, 28(3):451-461.

[28] ZHU Zhijun, CHEN Hongde, HU Xiaoqiang, et al. Framework of sequence stratigraphy,sedimentary system and evolution of Jurassic in Western Sichuan Foreland Basin[J]. Acta Sedimentologica Sinica, 2010, 28(3):451-461.

[29] 刘君龙, 孙冬胜, 纪友亮, 等. 川西晚侏罗世前陆盆地浅水三角洲砂体分布特征与叠置模式[J]. 石油与天然气地质, 2018, 39(6): 1164-1178.

[30] LIU Junlong, SUN Dongsheng, JI Youliang, et al. Distribution characteristics and superimposition pattern of the Late Jurassic shallow water deltic sand body in the foreland basin of Western Sichuan Depression[J]. Oil & Gas Geology, 2018, 39(6):1164-1178.

[31] 王永栋, 付碧宏, 谢小平, 等. 四川盆地陆相三叠系与侏罗系[M]. 合肥: 中国科学技术大学出版社,2010:1.

[32] WANG Yongdong, FU Bihong, XIE Xiaoping, et al. The terrestrial Triassic and Jurassic in the Sichuan Basin[M]. Hefei: University of Science and Technology of China,2010:1.

[33] 童崇光. 四川盆地构造演化与油气聚集[M]. 北京: 地质出版社,1992:10-29.

[34] TONG Chongguang. Structural evolution and hydrocarbon accumulation in Sichuan Basin[M]. Beijing: Geological Publishing House,1992:10-29

[35] 李智武, 宋天慧, 王自剑, 等. 川西一龙门山盆山系统走向差异演化的变形、隆升和沉积记录及关键构造变革期讨论[J]. 成都理工大学学报(自然科学版), 2021, 48(3):257-282.

[36] LI Zhiwu, SONG Tianhui, WANG Zijian, et al. Strike variation evolution of the basin-mountain system in Western Sichuan Longmenshan as recorded by deformation,exhumation and deposition and discussion on the period of key structural transformation[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2021, 48(3):257-282.

[37] 吴鑫涛, 刘丽, 葛家旺, 等. 川中地区沙二一段古地貌对河道砂体发育的控制作用[J]. 特种油气藏, 2024, 31(6):57-66.

[38] WU Xintao, LIU Li, GE Jiawang, et al. Paleogeomorphology control of J₂s₁ ² in the Central Sichuan Basin on the development of channel sand bodies[J]. Special Oil & Gas Reservoirs, 2024, 31(6):57-66.

[39] 冯潇飞, 赵晓明, 张喜, 等. 川中地区中侏罗世早期天文驱动下的湖平面波动及沉积物分布规律[J]. 石油与天然气地质, 2024, 45(5): 1368-1382.

[40] FENG Xiaofei, ZHAO Xiaoming, ZHANG Xi, et al. Astronomically forced lake-level fluctuation and sediment distribution patterns during the Early Middle Jurassic,Central Sichuan Basin[J]. Oil & Gas Geology, 2024, 45(5):1368-1382.

[41] HU Yong, XIAO Juan, HE Wenxiang, et al. Application of high frequency lake level change in the prediction of tight sandstone thin reservoir by sedimentary simulation[J]. Marine and Petroleum Geology, 2021, 128:105049.

[42] 邓胜徽, 卢远征, 赵怡, 等. 中国侏罗纪古气候分区与演变[J]. 地学前缘, 2017, 24(1):106-142.

[43] DENG Shenghui, LU Yuanzheng, ZHAO Yi, et al. The Jurassic palaeoclimate regionalization and evolution of China[J]. Earth Science Frontiers, 2017, 24(1):106-142.

[44] 郭荣涛, 林东升, 张忠民, 等. 下刚果盆地晚渐新世—中新世挤压带盐构造地貌特征及其对重力流沉积的控制作用[J]. 东北石油大学学报, 2025, 49(1):18-32.

[45] GUO Rongtao, LIN Dongsheng, ZHANG Zhongmin, et al. Geomorphology characteristics of salt structures and their controlling effects of gravity flow deposits in the contraction belt from Late Oligoceneto Miocene in the Lower Congo Basin[J]. Journal of Northeast Petroleum University, 2025, 49(1):18-32.

[46] PERRIER R, QUILBIER J. Thickness changes in sedimentary layers during compaction history[J]. AAPG Bulletin, 1974, 58(3): 507-520.

[47] 邓莉, 刘君龙, 钱玉贵, 等. 川西地区龙门山前带侏罗系物源与沉积体系演化[J]. 石油与天然气地质, 2019, 40(2):380-391.

[48] DENG Li, LIU Junlong, QIAN Yugui, et al. Provenance and sedimentary system of the Jurassic successions in the front of Longmen Mountain in Western Sichuan Basin[J]. Oil & Gas Geology, 2019, 40(2):380-391.

[49] 孟吴, 钟大康, 李超, 等. 渤海湾盆地渤中坳陷渤中 25-1 油田古近系沙河街组沙二段沉积相及演化[J]. 古地理学报, 2016, 18(2):12.

[50] MENG Hao. ZHONG Dakang, LI Chao, et al. Sedimentary facies and evolution of the member 2 of Paleogene Shahejie Formation of BZ25-1 Oilfield in Bozhong Depression,Bohai Bay Basin[J]. Journal of Palaeogeography, 2016, 18(2):12.

[51] 林畅松. 沉积盆地分析原理与应用[M]. 北京: 石油工业出版社,2016:104-132.

[52] LIN Changsong. Sedimentary basin analysis principle and application[M]. Beijing: Petroleum Industry Press,2016:104-132.

[53] 钱利军. 川西北地区中、下侏罗统物质分布规律与沉积充填过程[D]. 成都: 成都理工大学,2013:74-96.

[54] QIAN Lijun. Regulation of sedimentary distribution and sedimentary filling process during Middle and Lower Jurassic in Western and Northern Sichuan,China[D]. Chengdu: Chengdu University of Technology,2013:74-96.

[55] 王欣, 陈龙, 席聪, 等. 渝西地区须家河组辫状河三角洲沉积特征及演化模式[J]. 东北石油大学学报, 2024, 48(6):81-97.

[56] WANG Xin, CHEN Long, TUO Cong, et al. Sedimentary characteristics and evolution of braided river delta of the Xujiahe Formation in Western Chongqing Area[J]. Journal of Northeast Petroleum University, 2024, 48(6):81-97.

[57] 李胡蝶, 王昌勇, 李楠, 等. 四川盆地东部中一下侏罗统沉积体系及其演化特征[J]. 成都理工大学学报(自然科学版), 2023, 50(3): 279-293.

[58] LI Hudie, WANG Changyong, LI Nan, et al. The Middle-Lower Jurassic sedimentary system and its evolution characteristics in the Eastern Sichuan Basin,China[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2023, 50(3): 279-293.

[59] HUBERT J F. A zircon-tourmaline-rutile maturity index and the interdependence of the composition of heavy mineral assemblages with the gross composition and texture of sandstones[J]. SEPM Journal of Sedimentary Research, 1962, 32(3):440-450.

[60] 刘树根, 杨荣军, 吴熙纯, 等. 四川盆地西部晚三叠世海相碳酸盐岩一碎屑岩的转换过程[J]. 石油与天然气地质, 2009, 30(5): 556-565.

[61] LIU Shugen, YANG Rongjun, WU Xichun, et al. The Late Triassic transition from marine carbonate rock to clastics in the Western Sichuan Basin[J]. Oil & Gas Geology, 2009, 30(5):556-565.

[62] 厚刚福, 王力宝, 宋兵, 等. 坳陷湖盆古地貌对沉积体系的控制作用:以准噶尔盆地中部侏罗系三工河组二段一砂组为例[J]. 地质学报, 2022, 96(7):2519-2531.

[63] HOU Gangfu, WANG Libao, SONG Bing, et al. Analysing the controlling effect of palaeogeomorphology on sedimentary systems: a case study of the Jurassic Sangonghe Formation in the Central Junggar Basin[J]. Acta Geologica Sinica, 2022, 96(7):2519-2531.

[64] LI Shunli, YU Xinghe, TAN Chengpeng, et al. Jurassic sedimentary evolution of Southern Junggar Basin:implication for palaeoclimate changes in Northern Xinjiang Uygur Autonomous Region,China[J]. Journal of Palaeogeography, 2014, 3(2):145-161.

[65] 高云峰, 范廷恩, 蔡文涛, 等. 尼日尔三角洲盆地中新统深水浊流沉积体系演化特征及主控因素[J]. 东北石油大学学报, 2024, 48(5): 1-16.

[66] GAO Yunfeng, FAN Tingen, CAI Wentao, et al. Evolution characteristics and main controlling factors of deepwater turbidite system in the Miocene of the Niger Delta Basin[J]. Journal of Northeast Petroleum University, 2024, 48(5):1-16.

[67] 杨志力, 李丽, 吴佳男, 等. 西沙海域晚中新世深水水道发育特征及主控因素[J]. 东北石油大学学报, 2023, 47(4):29-38.

[68] YANG Zhili, LI Li, WU Jianan, et al. Development characteristics and controlling factors of Late Miocene deepwater channels in Xisha Area[J]. Journal of Northeast Petroleum University, 2023, 47(4):29-38.

[69] 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.

[70] LI 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.

[71] 金文正, 汤良杰, 杨克明, 等. 川西龙门山褶皱冲断带分带性变形特征[J]. 地质学报, 2007, 81(8):1072-1080.

[72] JIN Wenzheng, TANG Liangjie, YANG Keming, et al. Deformation and zonation of the Longmenshan fold and thrust zone in the Western Sichuan Basin[J]. Acta Geologica Sinica, 2007, 81(8):1072-1080.

[73] 李智武, 刘树根, 陈洪德, 等. 龙门山冲断带分段一分带性构造格局及其差异变形特征[J]. 成都理工大学学报(自然科学版), 2008, 35 (4):440-454.

[74] LI Zhiwu, LIU Shugen, CHEN Hongde, et al. Structural segmentation and zonation and differential deformation across and along the Longmen thrust belt,West Sichuan,China[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2008, 35(4):440-454.

[75] MENG Q R, WANG E, HU J M. Mesozoic sedimentary evolution of Northwest Sichuan Basin:implications for continued clockwise rotation of the South China Block[J]. Geologic Society of American Bulletin, 2005, 117(3):396-410.

[76] 张美, 任新成, 商丰凯, 等. 准噶尔盆地齐古组浅水河控三角洲沉积特征及模式探讨[J]. 特种油气藏, 2024, 31(6):67-76.

[77] ZHANG Mei, REN Xincheng, SHANG Fengkai, et al. Sedimentary characteristics and models of shallow-water river-dominated delta in Qigu Formation,Junggar Basin[J]. Special Oil & Gas Reservoirs, 2024, 31(6):67-76.

[78] 吴文娟, 戴建文, 王华, 等. 珠江口盆地深水气田储层差异及主控因素[J]. 非常规油气, 2024, 11(5):52-59.

[79] WU Wenjuan, DAI Jianwen, WANG Hua, et al. Reservoir property differences and main controlling factors in deep-water gas field, Pearl River Mouth Basin[J]. Unconventional Oil & Gas, 2024, 11(5):52-59.

[80] 文龙, 罗冰, 王小娟, 等. 四川盆地陆相致密油气勘探新领域及资源潜力[J]. 石油学报, 2025, 46(1):77-88.

[81] WEN Long, LUO Bing, WANG Xiaojuan, et al. New exploration fields and resource potential of continental tight oil and gas in Sichuan Basin[J]. Acta Petrolei Sinica, 2025, 46(1):77-88.

基金资助

中国石油化工股份有限公司科技项目(P23202)

中国石油化工股份有限公司科技项目(P24005)

中国石化中原油田科技项目(2023BY03)