德阳-安岳裂陷槽北段西边界地震识别及油气地质意义  

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

作　　者：张本健[1] 彭思桥 陈骁[1] 张玺华[1] 刘冉[1] 陈延贵[1] 杨翰轩 杨涛[1] ZHANG Benjian;PENG Siqiao;CHEN Xiao;ZHANG Xihua;LIU Ran;CHEN Yangui;YANG Hanxuan;YANG Tao(PetroChina Southwest Oil&Gas Field Company,Chengdu,Sichuan 610500,China)

机构地区：[1]中国石油西南油气田分公司,四川成都610500

出　　处：《特种油气藏》2025年第1期32-39,共8页Special Oil & Gas Reservoirs

基　　金：中国石油重大科技专项“海相碳酸盐岩油气规模增储上产与勘探开发技术研究”01课题“碳酸盐岩油气富集规律及有利区带研究”(2023ZZ16YJ01)。

摘　　要：受资料条件的限制,德阳—安岳裂陷槽北段西边界位置一直尚未明确,极大地阻碍了区域内灯影组沉积格局的研究及上覆二叠系气藏的勘探。针对该问题,利用二维、三维地震资料,通过对比德阳—安岳裂陷槽东侧地质特征,对裂陷槽北段西边界进行了重新刻画,并从控储、控烃及控藏的角度探讨了西边界对川西南地区中深层碳酸盐岩油气勘探的意义。研究表明:川西南部震旦系灯影组地层整体呈南西厚、北东薄的趋势,丹棱地区灯影组地层厚度大且稳定,无裂陷槽沉积的特征;德阳—安岳裂陷槽北段西边界整体呈南北走向,其大致沿井研—仁寿—彭山北—新津—温江一线分布;德阳—安岳裂陷槽整体表现为东陡西缓的箕状形态,川西南地区台缘坡度较缓,不存在明显的台缘丘滩体建隆。德阳—安岳裂陷槽分布特征研究对川西南地区中深层海相碳酸盐岩沉积格局、储层分布、烃源岩展布及油气成藏具有重要的意义。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.

关 键 词：地震识别 边界刻画 地质特征 德阳—安岳裂陷槽 四川盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]