川西前陆盆地南段薄皮冲断构造之下隐伏裂谷盆地及其油气地质意义

doi:10.11743/ogg20060404

摘要/Abstract

摘要：

地震剖面构造解释发现,川西前陆盆地南段二叠纪之前发育伸展裂谷盆地,其中可能充填沉积了数千米厚的志留系—石炭系的古生代地层;晚期经历了新生代的构造挤压变形,最终在几何学上表现为一个双层构造,即浅层逆冲褶皱构造和深部裂谷构造。浅层构造表现为一些断坪-断坡式逆冲断层以及与其伴生的褶皱变形,构造样式主要表现为断层转折褶皱,局部褶皱发育突破断层;而深部裂谷构造则发育地堑盆地和半地堑盆地,遭受挤压变形后发育局部正反转变形,并使得上覆的二叠系、中生界和新生界发生同步褶皱变形。深部裂谷构造在一定程度上控制了浅层冲断构造的发育形成。川西前陆盆地南段深部的古生界以及由于构造反转形成的古生界和中生界背斜中具有巨大的油气潜力,是川西地区油气勘探的新领域。

关键词: 正反转, 裂谷盆地, 前陆盆地, 二叠纪, 构造解析, 油气勘探, 四川盆地

Abstract:

Seismic interpretation reveals the rift basin in the south segment of the western Sichuan foreland basin,which had been developed before Permian,might be filled up with thousands of meters of Silurian-Carbo-(niferous) strata.The late stage of the area had gone through a tectonic compression in the Cenozoic,and as a result,the foreland basin exhibits a double-layer structure characterized by shallow fold-thrust structures and deep rift basins.The shallow structures consist of some flat-and ramp-related thrust faults and the associated fault bend folds,while the deep structures occur as graben-type basins and half-graben-type basins,which had experienced local positive inversion,resulting in the synchronous folding of the Permian,Mesozoic,and Cenozoic.The deep rift structures,to some extent,controlled the development of the shallow ones.It is suggested that the deep rift basins in the Paleozoic and the inverted anticlines in the Paleozoic and Mesozoic in the south segment in western Sichuan foreland basin may have large hydrocarbon potentials,thus are frontiers for exploration.

Key words: positive inversion, rift basin, foreland basin, Permian, structural interpretation, oil and gas exploration, Sichuan basin

中图分类号:

TE111.1

陈竹新,贾东,魏国齐,等. 川西前陆盆地南段薄皮冲断构造之下隐伏裂谷盆地及其油气地质意义[J]. 石油与天然气地质, 2006, 27(4): 460-466,474. doi: 10.11743/ogg20060404 Chen Zhuxin,Jia Dong,Wei Guoqi,et al. Buried rift basins under the Thin-skinned Fold-Thrust Belts in the South Segment of the western Sichuan Foreland Basin and their Geological Significance[J]. Oil & Gas Geology, 2006, 27(4): 460-466,474. doi: 10.11743/ogg20060404

参考文献

[1]潘桂棠,徐耀荣,王培生.青藏高原东部边缘新生代构造[A].见:地质矿产部青藏高原地质文集编委会,编.青藏高原地质文集(12)[C].北京:地质出版社,1983.129～142 Pan Guitang,Xu Yaorong,Wang Peisheng.The Cenozoic tectonics at the eastern margin of Tibetan Plateau[A].In:Ministry of Geo-logy and Mineral Resources,ed.Contribution to the geology of the Tibetan Plateau[C].Beijing:Geological Publishing House,1983.129-142
[2]黄汲清,陈炳蔚.中国及邻区特提斯海的演化[M].北京:地质出版社,1987.109 Huang Jiqing,Chen Binwei.The evolution of the Tethys in China and its adjacent regions[M].Beijing:Geological Publishing House,1987.109
[3]许志琴,侯立玮,王宗秀.中国松潘-甘孜造山带的造山过程[M].北京:地质出版社,1992.73～86 Xu Zhiqin,Hou Liwei,Wang Zongxiu.Orogenic processes of the Songpan-Garzê Orogenic Belt,China[M].Beijing:Geological Publishing House,1992.73-86
[4]Chen Shefa,Wilson C J L.Emplacement of the Longmenshan thrust-nappe belt along the eastern margin of the Tibetan Plateau[J].Journal of Structure Geology,1996,18(4):413-430
[5]龙学明.龙门山中北段地史发展的若干问题[J].成都地质学院学报,1991,18(1):8～16 Long Xueming.Several questions of geochronic evolution in the mid-northern segment of Longmenshan mountains[J].Journal of Chengdu College of Geology,1991,18(1):8-16
[6]杨克明,朱彤,何鲤.龙门山逆冲推覆带构造特征及勘探潜力分析[J].石油实验地质,2003,25(6):685～693,700 Yang Keming,Zhu Tong,He Li.Structural characteristics and exploration potential of the thrust block in Longmenshan[J].Petroleum Geology & Experiment,2003,25(6):685-693,700
[7]贾东,陈竹新,贾承造,等.龙门山褶皱冲断带构造解析与川西前陆盆地的发育[J].高校地质学报,2003,9(3):402～410 Jia Dong,Chen Zhuxin,Jia Chengzao,et al.Structural features of the Longmenshan fold and thrust belt and development of the wes-tern Sichuan foreland basin,central China[J].Geological Journal of China Universities,2003,9(3):402-410
[8]陈竹新,贾东,张惬,等.龙门山前陆褶皱冲断带的平衡剖面分析[J].地质学报,2005,79(1):38～45 Chen Zhuxin,Jia Dong,Zhang Qie,et al.Balanced cross-section analysis of the fold-thrust belt of Longmen Mountains[J].Acta Geologica Sinica,2005,79(1):38-45
[9]钟锴,徐鸣洁,王良书,等.川西两期前陆盆地南北两段构造演化的地球物理特征[J].石油学报,2004,25(6):29～32,37 Zhong Kai,Xu Mingjie,Wang Liangshu,et al.Geophysical evidences of two-segment tectonic evolution of two-phase foreland basin in western Sichuan province[J].Acta Petrolei Sinica,2004,25(6):29-32,37
[10]林茂柄,吴山.龙门山推覆构造变形特征[J].成都地质学院学报,1991,18(1):46～54 Lin Maobing,Wu Shan.Deformational features of nappe structures in the Longmenshan mountains[J].Journal of Chengdu College of Geology,1991,18(1):46-54
[11]陶晓风.龙门山南段推覆构造与前陆盆地演化[J].成都理工学院学报,1999,26(1):73～77 Tao Xiaofeng.Evolution of nappe tectonic and foreland basin in the southern section of Longmen mountains[J].Journal of Chengdu University of Technology,1999,26(1):73-77
[12]Burchfiel B C,Chen Zhiliang,Liu Yuping,et al.Tectonics of the Longmenshan and adjacent regions,central China[J].International Geology Review,1995,37(8):661-735
[13]罗志立.龙门山造山带岩石圈演化的动力学模式[J].成都地质学院学报,1991,18(1):1～7 Luo Zhili.The dynamical model of the lithospheric evolution in Longmenshan orogenic belt[J].Journal of Chengdu College of Geology,1991,18(1):1-7
[14]刘树根,罗志立,戴苏兰,等.龙门山冲断带的隆生和川西前陆盆地的沉降[J].地质学报,1995,9(3):205～213 Liu Shugen,Luo Zhili,Dai Sulan,et al.The uplift of Longmenshan thrust belt and subsidence of the western Sichuan foreland basin[J].Acta Geologica Sinica,1995,9(3):205-213
[15]刘和甫,梁慧社,蔡立国,等.川西龙门山冲断系构造样式与前陆盆地演化[J].地质学报,1994,68(2):101～118 Liu Hefu,Liang Huishe,Cai Liguo,et al.Structural styles of the Longmenshan thrust belt and evolution of the foreland basin in western Sichuan province,China[J].Acta Geologica Sinica,1994,68(2):101-118
[16]郭正吾,邓康龄,韩永辉.四川盆地形成与演化[M].北京:地质出版社,1996.48～138 Guo Zhengwu,Deng Kangling,Han Yonghui.The formation and development of Sichuan basin[M].Beijing:Geological Publishing House,1996.48-138
[17]四川省地质矿产局.四川省区域地质志[M].北京:地质出版,1991.1～200 Bureau of Geology and Mineral Resources of Sichuan Province.Regional geology of Sichuan Province[M].Beijing:Geological Publishing House,1991.1-200
[18]Suppe J.Geometry and kinematics of fault-bend folding[J].American Journal of Science,1983,283(7):684-721
[19]刘洛夫,金之钧.中国大中型油气田的主力烃源岩分布特征[J].石油学报,2002,23(5):6～13 Liu Luofu,Jin Zhijun.Distribution characteristics of major hydrocarbon source rocks in the middle-large oil and gas fields of China[J].Acta Petrolei Sinica,2002,23(5):6-13
[20]吴世祥,汪泽成,张林,等.川西前陆盆地勘探思路分析[J].石油与天然气地质,2001,22(3):210～216 Wu Shixiang,Wang Zecheng,Zhang lin,et al.Exploration strategy for the foreland basin in western Sichuan[J].Oil & Gas Geology,2001,22(3):210-216
[21]杨克明.川西坳陷油气资源现状及勘探潜力[J].石油与天然气地质,2003,24(4):322～326,331 Yang Keming.Status of oil & gas resources and prospecting potential in western Sichuan depression[J].Oil & Gas Geology,2003,24(4):322-326,331
[22]杨克明,叶军,吕正祥.川西坳陷上三叠统成藏年代学特征[J].石油与天然气地质,2005,26(2):208～213 Yang Keming,Ye Jun,Lv Zhengxiang.Chronological characteristics of Upper Triassic reservoirs in western Sichuan depression[J].Oil & Gas Geology,2005,26(2):208-213
[23]Picha F J.Exploring for hydrocarbons under thrust belts-a cha-llenging new frontier in the Carpathians and elsewhere[J].AAPG Bulletin,1996,80(10):1 547-1 564
[24]Thomas F,Patrick J.Influence of basin architecture on the style of inversion and fold-thrust belt tectonics-the southern Adelaide fold-thrust belt,South Australia[J].Journal of Structure Geology,1997,19(8):1 093-1 110
[25]Chaelton T R.The petroleum potential of inversion anticline in the Banda Arc[J].AAPG Bulletin,2004,88(5):565-585
[26]Mitra S.Duplex structures and imbricate thrust system:geometry,structural position,and hydrocarbon potential[J].AAPG Bulletin,1986,70(9):1 087-1 112
[27]贾承造,卢华复.库车-柯坪再生前陆冲断带油气聚集和勘探[M].北京:科学出版社,2004.1～132 Jia Chengzao,Lu Huafu.Hydrocarbon migration and exploration of Kuqa-Keping rejuvenated foreland thrust belt[M].Beijing:Science Press,2004.24-67
[28]卢华复,贾承造.库车-柯坪再生前陆冲断带构造[M].北京:科学出版社,2003:1～171 Li Huafu,Jia Chengzao.Structures of Kuqa-Keping rejuvenated foreland thrust belt[M].Beijing:Science Press,2003.19-112
[29]金强,翟庆龙.裂谷盆地的火山热液活动和油气生成[J].地质科学,2003,38(3):342～349 Jing Qiang,Zhai Qinglong.Volcanic and thermal-water activities and hydrocarbon generations in the rift basins,eastern China[J].Chinese Journal of Geology,2003,38(3):342-349
[30]Macgregor D S.Hydrocarbon habitat and classification of inverted rift basins[A].In:Geological Society of London.Basin inversion[C].Geological Society Special Publication,1995,88:83-93