冀中坳陷潜山构造演化特征及其石油地质意义
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摘要
利用地质、地球物理资料,借助平衡剖面技术,通过对冀中坳陷几条地震大剖面的构造演化恢复,对冀中坳陷潜山构造演化特征进行了探讨。研究表明,冀中坳陷潜山构造的总体演化表现出阶段性:Pt2-PZ,潜山形成的物质基础发育期;Mz,潜山的初始形成期;E2k-E3s2,潜山的主要发育期;E3s1-E3d为潜山构造的调整定型期;N-Q,潜山的深埋期。根据前中生代基底成山的时代与基底被中新生界地层覆盖时代之间的相互关系,可进一步将冀中坳陷潜山构造分为A类(基底先成山,再被覆盖形成潜山)、B类(基底成山的同时被上覆地层覆盖形成潜山)和C类(基底先被覆盖,后期再成山形成潜山构造)3种类型。其中A类潜山主要分布在靠近盆地中部牛驮镇凸起、雁翎、高阳低凸起等早期有古隆起存在的部位,受E2k-E3s2期冀中坳陷强烈块断裂陷作用的控制;B类为冀中坳陷潜山构造的主体;C类潜山在该区发育相对较少。单纯从演化特征看,成藏条件A类好于B类,B类好于C类。
By fully using the existing geological and geophysical data,especially the structural restoration of several large seismic profiles and by means of balanced cross-section technology and restoring the previous research results,investigates the characters of buried-hill evolutionary process in Jizhong Depression were studied.The result shows that the overall evolution of the buried-hill structure in Jizhong Depression experienced the following steps,which included that Pt2-PZ was the forming stage that constituted to the buried-hills'substances;Mz was the initial forming stage of the buried hills;E2k-E3s2 was the dominant development stage of the buried hills;E3s1-E3d was the adjusting and forming stage;N-Q was deep-buried stage.Based on the time sequence between mountain-building of the pre-Mesozoic basement and the age when the basement was covered by the Cenozoic strata,the buried-hills in Jizhong Depression could be divided into 3 types,Type A was that the basement was earlier uplifted and it was covered to form buried-hills;Type B was that the basement formed the mountain and it was covered by the overlying strata simultaneously,Type C was that the basement was covered before it was uplifted to form mountains.Type A was mainly distributed in the areas where the paleo-uplifts existed in the earlier period such as Niutuozhen Uplift near the center of the basin,the lower uplifts existed in Yanling and Gaoyang Uplifts.Influenced by strong fault-block rifting of Jizhong Depression at E2k-E3s2 stage,Type B is the main type of the buried-hills in Jizhong Depression.As far as the structural evolution characteristics are concerned,the order of quality of their reservoir conditions is A>B>C.
By fully using the existing geological and geophysical data,especially the structural restoration of several large seismic profiles and by means of balanced cross-section technology and restoring the previous research results,investigates the characters of buried-hill evolutionary process in Jizhong Depression were studied.The result shows that the overall evolution of the buried-hill structure in Jizhong Depression experienced the following steps,which included that Pt2-PZ was the forming stage that constituted to the buried-hills'substances;Mz was the initial forming stage of the buried hills;E2k-E3s2 was the dominant development stage of the buried hills;E3s1-E3d was the adjusting and forming stage;N-Q was deep-buried stage.Based on the time sequence between mountain-building of the pre-Mesozoic basement and the age when the basement was covered by the Cenozoic strata,the buried-hills in Jizhong Depression could be divided into 3 types,Type A was that the basement was earlier uplifted and it was covered to form buried-hills;Type B was that the basement formed the mountain and it was covered by the overlying strata simultaneously,Type C was that the basement was covered before it was uplifted to form mountains.Type A was mainly distributed in the areas where the paleo-uplifts existed in the earlier period such as Niutuozhen Uplift near the center of the basin,the lower uplifts existed in Yanling and Gaoyang Uplifts.Influenced by strong fault-block rifting of Jizhong Depression at E2k-E3s2 stage,Type B is the main type of the buried-hills in Jizhong Depression.As far as the structural evolution characteristics are concerned,the order of quality of their reservoir conditions is A>B>C.
引文
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[2]张青林,任建业.济阳坳陷中生界潜山类型及其分布规律与形成过程研究[J].重庆石油高等专科学校学报,2004,6(4):11～15.
[3]郭良川,刘传虎,尹朝洪,等.潜山油气藏勘探技术[J].勘探地球物理进展,2002,2(1):19～25.
[4]刘建中,张建荚,安欧,等.潜山油藏[M].北京:石油工业出版社,1999.43～44.
[5]华北石油勘探开发设计研究院.潜山油气藏[M].北京:石油工业出版社,1982.5～6.
[6]藏明峰,吴孔友,崔永谦,等.冀中坳陷古潜山类型及油气成藏[J].石油与天然气学报,2009,31(2):166～169.
[7]Jianye R,Kensaku T,Sitian L,et al.Late Mesozoic and Cenozoic rifting and its dynamic setting in Eastern China and adjacent areas[J].Tectonophysics,2002,344:175～205.
[8]陆克政,漆家幅,戴俊生,等.渤海湾新生代含油气盆地构造模式[M].北京:地质出版社,1997.82～86.
[9]华北油田石油地质志编写组.中国石油地质志(卷五.华北油田)[M].北京:石油工业出版社,1987.63～64.
[10]刘波,钱祥麟,王英华.华北板块早古生代构造沉积演化[J].地质科学,1999,34(3):347～356.
[11]钱祥麟.华北板块受扬子板块碰撞的响应及中新生代华北板块构造格局的成因[A].大陆构造学术讨论会论文[C].北京:地质出版社,1995.126～132.
[12]李洪革,杜旭东,陆克政,等.渤海湾地区中西部中生代构造特征及演化[J].石油大学学报,1999,23(3):1～5.
[13]Yang Jin-hui,Wu Fu-yuan,Shao Ji-an,et al.Constraints on the timing of uplift of the Yanshan Fold and Thrust Belt,North China[J].Earth and Planetary Science Letters,2006,246:336～352.
[14]侯贵廷,钱祥麟,宋新民.渤海湾盆地形成机制研究[J].北京大学学报(自然科学版),1998,34(4):503～509.
[15]Tang Yanjie,Zhang Hongfu,Ying Jifeng.Asthenosphere-lithospheric mantle interaction in an extensional regime:Implication fromthe geochemistry of Cenozoic basalts from Taihang Mountains,North China Craton[J].Chemical Geology,2006,233:309～327.
[16]杨伟荣,钱铮,张欣,等.冀中地区文安斜坡带成藏特征研究[J].岩性油气藏,2008,9(3):49～52.
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