Seismic identification of the western boundary of the northern section of the Deyang-Anyue rift trough and its geological significance

doi:10.3969/j.issn.1006-6535.2025.01.004

Abstract

Abstract: Due to data constraints,the western boundary of the northern section of the Deyang-Anyue rift trough has not been clearly defined,which greatly hinders the research on the sedimentary patterns of the Dengying Formation in the region and the exploration of the overlying Permian gas reservoirs.To address this issue,geological features on the eastern side of the Deyang-Anyue rift trough were correlated with 2D and 3D seismic data so as to recharacterize the western boundary of the northern segment of the rift trough.Furthermore,the significance of this western boundary for the exploration of medium-deep carbonate oil and gas resources in southwestern Sichuan is discussed from the perspectives of reserves control,hydrocarbon control and reservoir control.The study shows that the overall trend of the Sinian Dengying Formation in southwestern Sichuan is thick to the southwest and thin to the northeast. The Dengying Formation in the Danleng Area is thick and stable and has no characteristics of rift trough deposition.The western boundary of the northern section of the Deyang-Anyue rift trough runs approximately north-south,roughly distributing along the line of Jingyan-Renshou-Pengshanbei-Xinjin-Wenjiang.The Deyang-Anyue rift trough overall presents a half graben that is steep to the east and gentle to the west. The slope of the platform margin in southwestern Sichuan Basin is relatively slow with no obvious uplift of the platform margin mound and beach body.The study of the distribution characteristics of the Deyang-Anyue rift trough has important implications for the sedimentary patterns,reservoir distribution,source rock distribution and hydrocarbon accumulation of medium-deep marine carbonate rocks in southwestern Sichuan.

Key words: seismic identification, boundary characterization, geological features, Deyang-Anyue rift trough, Sichuan Basin

CLC Number:

TE122

ZHANG Benjian, PENG Siqiao, CHEN Xiao, ZHANG Xihua, LIU Ran, CHEN Yangui, YANG Hanxuan, YANG Tao. Seismic identification of the western boundary of the northern section of the Deyang-Anyue rift trough and its geological significance[J]. Special Oil & Gas Reservoirs, 2025, 32(1): 32-39.

References

[1] 苏桂萍,李忠权,应丹琳,等.四川盆地加里东古隆起形成演化及动力学成因机理[J].地质学报,2020,94(6):1793-1812.
SU Guiping,LI Zhongquan,YING Danlin,et al.Formation and evolution of the Caledonian paleo-uplift and its genetic mechanism in the Sichuan Basin[J].Acta Geologica Sinica,2020,94(6):1793-1812.
[2] 谷明峰,刘冉,张豪,等.四川盆地加里东期构造运动特征及其地质响应[J].天然气工业,2023,43(2):32-43.
GU Mingfeng,LIU Ran,ZHANG Hao,et al.Characteristics and geological response of Caledonian tectonic movement in the Sichuan Basin[J].Natural Gas Industry,2023,43(2):32-43.
[3] 王东,刘宏,唐松,等.川中二叠系长兴组层序格架内台内滩沉积构型与分布规律[J].石油勘探与开发,2023,50(2):346-359.
WANG Dong,LIU Hong,TANG Song,et al.Sedimentary architecture and distribution of intra-platform shoal in sequence framework of Permian Changxing Formation in central Sichuan Basin,SW China[J].Petroleum Exploration and Development,2023,50(2):346-359.
[4] 谭磊,刘宏,陈康,等.川中高磨地区震旦系灯影组三、四段层序沉积与储集层分布[J].石油勘探与开发,2022,49(5):871-883.
TAN Lei,LIU Hong,CHEN Kang,et al.Sequence sedimentary evolution and reservoir distribution in the Third and Fourth Members of Sinian Dengying Formation,Gaomo Area,Sichuan Basin,SW China[J].Petroleum Exploration and Development,2022,49(5):871-883.
[5] WANG Dong,LIU Hong,YU Tong,et al.Prediction and significance of intra-platform shoals distribution of Changxing Formation in Gaoshiti Area of Sichuan Basin[J].Carbonates & Evaporites,2023,38(1): 1-13
[6] 侯明才,邢凤存,徐胜林,等.上扬子E-C转换期古地理格局及其地球动力学机制探讨[J].沉积学报,2017,35(5):902-917.
HOU Mingcai,XING Fengcun,XU Shenglin,et al.Paleogeographic patterns of E-C transition period in the Upper Yangtze and the geodynamic mechanism[J].Acta Sedimentologica Sinica,2017,35(5):902-917.
[7] WANG Han,WU Wenhui,LIU Shugen,et al.Initial separation of the south Qinling Terrane from the Yangtze Block during the Ediacaran:insights from sequence correlation and zircon Hf isotope of tuff[J].Marine and Petroleum Geology,2020,122:104613.
[8] 李智武,冉波,肖斌,等.四川盆地北缘震旦纪—早寒武世隆-坳格局及其油气勘探意义[J].地学前缘,2019,26(1):59-85.
LI Zhiwu,RAN Bo,XIAO Bin,et al.Sinian to Early Cambrian uplift-depression framework along the northern margin of the Sichuan Basin,central China and its implications for hydrocarbon exploration[J].Earth Science Frontiers,2019,26(1):59-85.
[9] 谷志东,李宗银,袁苗,等.四川盆地及其周缘晚震旦世—早寒武世早期区域抬升运动对岩溶储层发育的影响[J].天然气工业,2014,34(8):37-45.
GU Zhidong,LI Zongyin,YUAN Miao,et al.Influences of regional uplifting during the Late Sinian-Early Cambrian on the development of karst reservoirs in the Sichuan Basin and its peripheral area[J].Natural Gas Industry,2014,34(8):37-45.
[10] 刘树根,孙玮,罗志立,等.兴凯地裂运动与四川盆地下组合油气勘探[J].成都理工大学学报(自然科学版),2013,40(5):511-520.
LIU Shugen,SUN Wei,LUO Zhili,et al.Xingkai taphrogenesis and petroleum exploration from Upper Sinian to Cambrian Strata in Sichuan Basin,China[J].Journal of Chengdu University of Technology (Natural Science Edition),2013,40(5):511-520.
[11] 李伟,刘静江,邓胜徽,等.四川盆地及邻区震旦纪末—寒武纪早期构造运动性质与作用[J].石油学报,2015,36(5):546-556,563.
LI Wei,LIU Jingjiang,DENG Shenghui,et al.The nature and role of Late Sinian-Early Cambrian tectonic movement in Sichuan Basin and its adjacent areas[J].Acta Petrolei Sinica,2015,36(5):546-556,563.
[12] 刘运黎,周小进,廖宗庭,等.华南加里东期相关地块及其汇聚过程探讨[J].石油实验地质,2009,31(1):19-25.
LIU Yunli,ZHOU Xiaojin,LIAO Zongting,et al.Relative blocks and convergence process during the Caledonian movement in south China[J].Petroleum Geology & Experiment,2009,31(1):19-25.
[13] 陈洪德,侯明才,许效松,等.加里东期华南的盆地演化与层序格架[J].成都理工大学学报(自然科学版),2006,33(1):1-8.
CHEN Hongde,HOU Mingcai,XU Xiaosong,et al.Tectonic evolution and sequence stratigraphic framework in south China during Caledonian[J].Journal of Chengdu University of Technology (Natural Science Edition),2006,33(1):1-8.
[14] 黎荣,王永骁,汪泽成,等.四川盆地晚震旦世—早寒武世德阳—安岳裂陷槽南段地质特征[J].石油勘探与开发,2023,50(2):285-296.
LI Rong,WANG Yongxiao,WANG Zecheng,et al.Geological characteristics of the southern segment of the Late Sinian-Early Cambrian Deyang-Anyue rift trough in Sichuan Basin,SW China[J].Petroleum Exploration and Development,2023,50(2):285-296.
[15] 杜金虎,汪泽成,邹才能,等.上扬子克拉通内裂陷的发现及对安岳特大型气田形成的控制作用[J].石油学报,2016,37(1):1-16.
DU Jinhu,WANG Zecheng,ZOU Caineng,et al.Discovery of intra-cratonic rift in the Upper Yangtze and its control effect on the formation of Anyue giant gas field[J].Acta Petrolei Sinica,2016,37(1):1-16.
[16] 李柱正,石晶慧萃,王家辉,等.川中德阳—安岳古裂陷槽震旦系灯影组残丘型储层特征及其油气勘探意义[J].天然气地球科学,2022,33(8):1263-1275.
LI Zhuzheng,SHI Jinghuicui,WANG Jiahui,et al.Characteristics of residual hill-type reservoir of Sinian Dengying Formation in Deyang-Anyue ancient rift trough,central Sichuan and its significance for oil and gas exploration[J].Natural Gas Geoscience,2022,33(8):1263-1275.
[17] 马奎,文龙,张本健,等.四川盆地德阳—安岳侵蚀裂陷槽分段性演化分析和油气勘探意义[J].石油勘探与开发,2022,49(2):274-284.
MA Kui,WEN Long,ZHANG Benjian,et al.Segmented evolution of Deyang-Anyue erosion rift trough in Sichuan Basin and its significance for oil and gas exploration,SW China[J].Petroleum Exploration and Development,2022,49(2):274-284.