北黄海盆地地质构造特征及其演化
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摘要
北黄海地区是我国研究程度最低的海区,各种情况表明,本区油气前景乐观。为了弄清北黄海盆地地质构造特征及其演化,在前人研究成果基础上,对北黄海盆地原有二维地震资料和重磁资料进行了重新处理和解释。资料处理采用了地震多次波压制技术、精细速度谱分析、位场延拓、小波多尺度分析、区域场和剩余场分解、方向导数分析以及重震联合反演等多种处理技术,对地球物理资料进行了综合解释。北黄海盆地结晶基底北低南高。褶皱基底呈NE向格局,埋深起伏变化较大。盆地主要发育NE向和NW向两组断裂。盆地被两条NE向的边界断裂所控制。NW向断裂是盆地内的次级断裂,控制了盆地内坳陷和隆起的分布范围和形态,使北黄海盆地形成三坳两隆的构造体系。规模较小的NE向3级断裂分布在坳陷内部,将坳陷分为不同规模的局部凹陷和局部隆起。火成岩主要分布在西部隆起带的南端和南部隆起带上,火成岩对坳陷内部影响不大。
The North Yellow Sea Basin is an oceanic area we studied little. However, it is optimistic to find oil and gas reservoirs in this area according to different information. We reprocessed and reinterpreted 2D seismic data as well as gravity and magnetic data of this area, standing on the former researchers' shoulder, for the purpose of studying the tectonic features and its evolution further. We implemented a lot of methods such as multiple attenuation, fine velocity spectrum analysis, continuation of potential field, multi-scale analysis, separation of region and residual field, directional derivative analysis, joint inversion of seismic and gravity etc. to make sure the results be more reliable. After integrated interpretation, we got some meaningful results. The crystallized basement is higher in the north and lower in the south. The fold basement that is rolling is in NE direction. There are two sets of fractures one of which is in NE direction and the other is in NW direction in the basin. There are two NE directional fractures located in the north and south separately that become the basin's margin.
The North Yellow Sea Basin is an oceanic area we studied little. However, it is optimistic to find oil and gas reservoirs in this area according to different information. We reprocessed and reinterpreted 2D seismic data as well as gravity and magnetic data of this area, standing on the former researchers' shoulder, for the purpose of studying the tectonic features and its evolution further. We implemented a lot of methods such as multiple attenuation, fine velocity spectrum analysis, continuation of potential field, multi-scale analysis, separation of region and residual field, directional derivative analysis, joint inversion of seismic and gravity etc. to make sure the results be more reliable. After integrated interpretation, we got some meaningful results. The crystallized basement is higher in the north and lower in the south. The fold basement that is rolling is in NE direction. There are two sets of fractures one of which is in NE direction and the other is in NW direction in the basin. There are two NE directional fractures located in the north and south separately that become the basin's margin.
引文
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[2] 金翔龙,喻普之.北黄海构造轮廓[A].黄东海地质[C],北京:科学出版社,1982.2329.
[3] 蔡峰.北黄海盆地基底地质特征[J].海洋地质动态,1996,12(12):13.
[4] 蔡峰.北黄海盆地中新生代沉积环境及特征[J].海洋地质动态,1997,12(8):13.
[5] 李乃胜.黄海三大盆地的构造演化[J].海洋与湖沼,1995,26(4):355362.
[6] 蔡峰.北黄海盆地基本石油地质条件分析[J].海洋地质动态,1998,14(4):710.
[7] 蔡乾忠.中国海域及邻区主要含油气盆地与成藏地质条件[J].海洋地质与第四纪地质,1998,18(4):110.
[8] 李廷栋,莫杰.黄海地质构造与油气资源[J].海洋地质动态,2002,18(11):47.
[9] 戴春山,李刚,蔡峰,等.黄海前第三系及油气勘探方向[J].中国海上油气(地质),2003,17(4):225231.
[10] 郝天珧,刘伊克,徐万哲.黄海和邻区重磁场及区域构造特征[J].地球物理学进展,1998,13(1):2739.
[11] 郝天珧,SUHmancheol,王谦身,等.根据重力数据研究黄海周边断裂带在海区的延伸[J].地球物理学报,2002,45(3):385396.
[12] 戴明刚.黄海地质与地球物理特征研究进展[J].地球物理学进展,2003,18(4):583591.
[13] 刘振湖,姚永坚,曾祥辉,等.北黄海盆地油气远景及勘探的若干问题[A].黄海海域油气地质[C],北京:海洋出版社,2003.6974.
[14] 冯志强,姚永坚,曾祥辉,等.对黄海中、古生界地质构造特征及油气远景的新认识[J].海洋地质动态,2002,18(11):1720.
[15] 李丕龙.陆相断陷盆地油气地质与勘探[A].陆相断陷盆地构造演化与构造样式[C].北京:石油工业出版社,地质出版社,2003.1873.
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