生物礁内部地震反射特征的地质解读及以体系域为单元的层序地层学认识——以珠江口盆地生物礁为例
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摘要
通过分析珠江口盆地东沙隆起生物礁生长方式对海平面变化的响应,归纳出不同时期礁体生长的几种可能的几何形态和相应的地震响应特征,并对生物礁内部地震反射特征进行地质解读,建立了成礁模式,获得以体系域为单元的生物礁层序地层认识,为层序划分和层位对比解释提供了较可靠的参考。
The Tertiary reefs in the Pearl River Mouth Basin have huge oil potential.Though the identification of reef's seismic feature and the analysis of sequence stratigraphy have achieved in progress,the analysis with system tract as a unit on sequence stratigraphy of reef reservoirs is seldom done.By analyzing the growth patterns of reefs in response to the sea-level changes,we have summed up several possible geometric patterns and the corresponding seismic feature for the growth of reefs in Dongsha Uplift in the Pearl River Mouth Basin at different times.In accordance with the foregoing understanding of the reefs,the geological interpretation on seismic reflection characteristics is finished and a model of reef formation is built to be aware of stratigraphic sequence of reefs with system tract as a unit.It can provide a more reliable reference to horizon contrast and the division of sequence boundaries.
The Tertiary reefs in the Pearl River Mouth Basin have huge oil potential.Though the identification of reef's seismic feature and the analysis of sequence stratigraphy have achieved in progress,the analysis with system tract as a unit on sequence stratigraphy of reef reservoirs is seldom done.By analyzing the growth patterns of reefs in response to the sea-level changes,we have summed up several possible geometric patterns and the corresponding seismic feature for the growth of reefs in Dongsha Uplift in the Pearl River Mouth Basin at different times.In accordance with the foregoing understanding of the reefs,the geological interpretation on seismic reflection characteristics is finished and a model of reef formation is built to be aware of stratigraphic sequence of reefs with system tract as a unit.It can provide a more reliable reference to horizon contrast and the division of sequence boundaries.
引文
①胡平忠,谢衍兴,王金中.东沙碳酸盐台地第三纪生物礁(滩)型油藏勘探[R].南海东部石油公司,1990.
[1]郭建宇,马朋善,胡平忠.地震—地质方法识别生物礁[J].石油地球物理勘探,2006,41(6):587-591.
[2]邱燕,陈泓君,欧阳付成.南海新生代盆地第三纪生物礁层序地层分析[J].南海地质研究,1999,(11):53-66.
[3]胡平忠.油气勘探中的生物礁地震—地质解释[J].南海东部石油,1998,36(1):1-15.
[4]刘殊,杨继友.一个可能的生物礁预测[J].石油物探,2004,43(1):20-25.
[5]冯增昭.碳酸盐岩岩相古地理学[M].北京:石油工业出版社,1989:90-91.
[6]邱燕.生物礁的地震鉴别方法[J].海洋地质,1999,(2):12-21.
[1]郭建宇,马朋善,胡平忠.地震—地质方法识别生物礁[J].石油地球物理勘探,2006,41(6):587-591.
[2]邱燕,陈泓君,欧阳付成.南海新生代盆地第三纪生物礁层序地层分析[J].南海地质研究,1999,(11):53-66.
[3]胡平忠.油气勘探中的生物礁地震—地质解释[J].南海东部石油,1998,36(1):1-15.
[4]刘殊,杨继友.一个可能的生物礁预测[J].石油物探,2004,43(1):20-25.
[5]冯增昭.碳酸盐岩岩相古地理学[M].北京:石油工业出版社,1989:90-91.
[6]邱燕.生物礁的地震鉴别方法[J].海洋地质,1999,(2):12-21.
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