新构造运动在南黄海盆地的表现及其对油气成藏的影响
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摘要
在精细地震资料构造解释基础上,认为上新世—第四纪是南黄海盆地新构造运动的主要活动期,对应南黄海盆地第二个阶段的断裂活动期。垂向上,新构造运动具有早晚构造响应差异:早期南北向弱挤压背景下以张性正断层为主,晚期东西向两幕挤压背景下以逆断层和褶皱为主;平面上,新构造运动影响亦具有差异:北部坳陷活动强烈、正断层发育、逆断层少量,而南部坳陷活动较弱。新构造运动与北部坳陷烃源岩的生排烃时期吻合,断裂带是重要输导体系,也是重要的潜在成藏区。
Two phases of faulting once occurred in the South Yellow Sea Basin: Late Cretaceous to the Palaeogene,and the Neogene to the Quaternary,of which the Pliocene to the Quaternary is the main periods when the neotectonic movements were accentuated in the South Yellow Sea Basin. Vertically, the early NS-trending compressional faulting lead to the development of the extensional normal faults whereas the late EW-trending compressional faulting lead to the development of the thrust faults and folds. Horizontally,the downwarped faulting is highly active and the normal faults are well developed in the northern part of the Basin whereas in the southern part of the Basin,the downwarped faulting is relatively inactive. The timing of the neotectonic movements cited above is thought to be in agreement with those of the generation and expulsion of the hydrocarbons in the source rocks from the northern depression. The faults generated by the neotectonic movements may serve as not only the vertical migration channels for the hydrocarbons but also the favourable areas for the oil and gas accumulation in the South Yellow Sea Basin.
Two phases of faulting once occurred in the South Yellow Sea Basin: Late Cretaceous to the Palaeogene,and the Neogene to the Quaternary,of which the Pliocene to the Quaternary is the main periods when the neotectonic movements were accentuated in the South Yellow Sea Basin. Vertically, the early NS-trending compressional faulting lead to the development of the extensional normal faults whereas the late EW-trending compressional faulting lead to the development of the thrust faults and folds. Horizontally,the downwarped faulting is highly active and the normal faults are well developed in the northern part of the Basin whereas in the southern part of the Basin,the downwarped faulting is relatively inactive. The timing of the neotectonic movements cited above is thought to be in agreement with those of the generation and expulsion of the hydrocarbons in the source rocks from the northern depression. The faults generated by the neotectonic movements may serve as not only the vertical migration channels for the hydrocarbons but also the favourable areas for the oil and gas accumulation in the South Yellow Sea Basin.
引文
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[2]龚再升.中国近海含油气盆地新构造运动与油气成藏[J].地球科学-中国地质大学学报,2004,29(5):513-517.
[3]侯方辉,张志珣,李三忠,等.南黄海新构造运动[J].海洋地质动态,2005,21(11):8-10.
[4]侯明金,朱光,Jacques Mercier,等.郯庐断裂带(安徽段)及邻区的动力学分析与区域构造演化[J].地质科学,2007,42(2):362-381.
[5]贾承造,何登发,石昕,等.中国油气晚期成藏特征[J].地球科学,2006,36(5):412-420.
[6]李双林,何拥军,肖菲,等.南黄海北部盆地表层沉积物烃类地球化学探测[J].海洋地质与第四纪地质,2003,23(4):40-44.
[7]刘卫红,林畅松,郭泽清,等.东海陆架盆地西湖凹陷新生代反转构造样式及其形成机制初探[J].地质科学,2009,44(1):74-87.
[8]任纪舜,姜春发,张正昆,等.中国大地构造作用及其演化[M].北京:科学出版社,1980. 110-127.
[9]万天丰.山东省构造演化与应力场研究[J].山东地质,1992,8(2):70-101.
[10]王庭斌.新近纪以来的构造运动是中国气藏形成的重要因素[J].地质评论,2004,50(1):33-41.
[11]徐辉龙,丘学林.莺歌海盆地新构造运动与超压体系喷溢油气成藏作用[J].海洋地质与第四纪地质,2006,26(3):93-100.
[12]徐杰,周本刚,计凤桔等.中国东部海域及其邻区现代构造应力研究[J].地学前缘,2012,19(4):001-007.
[13]杨琦,陈红宇.苏北-南黄海盆地构造演化[J].石油实验地质,2003,25(增刊):562-565.
[14]姚永坚,夏斌,冯志强,等.南黄海古生代以来构造演化[J].石油实验地质,2005,27(2):124-128.
[15]朱光,刘国生,牛漫兰,等.郯庐断裂带晚第三纪以来的浅部挤压活动与深部过程[J].地震地质,2002,24(2):265-277.
[16]朱光,王道轩,刘国生,等.郯庐断裂的演化及其对西太平洋板块运动的响应[J].地质科学,2004,39(1):36-49.
[17]曾治平.渤海新构造运动对渤海东部油气性质的影响[J].海洋地质动态,2002,18(9):1-5.
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