珠江口盆地北部坳陷带构造特征
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摘要
构造演化分析表明,珠江口盆地北部坳陷带在新生代经历了断陷期、断—坳转换期和坳陷期三大演化阶段,而断陷期又可进一步划分为文昌期和恩平期2个裂陷幕。由于纵向上2幕裂陷作用的迁移和地层不完全叠置,在坳陷带内形成了厚文昌薄恩平型和薄文昌厚恩平型2种类型的凹陷,其中前者是较为有利的富生烃凹陷。北部坳陷带内各凹陷断裂十分发育,且具有多期活动的特点。根据断裂活动时间可将其分为3类:早期活动型、晚期活动型和早晚持续活动型。早期活动型断裂对凹陷和构造带的形成、发育起到控制作用,晚期活动型断裂对圈闭形成与定型、油气运移起到控制作用,早晚持续活动型断裂兼有前两者的共同特征。
The structural evolution analysis shows that the northern depression belt of the Pearl River Mouth Basin has experienced three evolutional stages in the Cenozoic,i.e.,rift stage,transitional rift-depression stage and depression stage,and that the rift stage can be further divided into two rifting episodes of the Wenchang period and Enping period. Due to the migration of the two rifting and incomplete stratigraphic juxtaposition,two types of depressions,i.e.,″thick Wenchang to thin Enping formations″ and ″thin Wenchang to thick Enping formations″ types,were formed in the depression zone,of which the former type is favorable for hydrocarbon generation.Faults are very developed in the northern depression belt,and are featured by multiple periods of fault activities. According to the activity time,the faults can be divided into three categories: early active type,late active type and sustained active type. The early active faults control the formation of the depression and tectonic belts; the late active faults control the formation and shaping of traps,and the oil and gas migration; and the sustained active faults possess the common characteristics of the former two types.
The structural evolution analysis shows that the northern depression belt of the Pearl River Mouth Basin has experienced three evolutional stages in the Cenozoic,i.e.,rift stage,transitional rift-depression stage and depression stage,and that the rift stage can be further divided into two rifting episodes of the Wenchang period and Enping period. Due to the migration of the two rifting and incomplete stratigraphic juxtaposition,two types of depressions,i.e.,″thick Wenchang to thin Enping formations″ and ″thin Wenchang to thick Enping formations″ types,were formed in the depression zone,of which the former type is favorable for hydrocarbon generation.Faults are very developed in the northern depression belt,and are featured by multiple periods of fault activities. According to the activity time,the faults can be divided into three categories: early active type,late active type and sustained active type. The early active faults control the formation of the depression and tectonic belts; the late active faults control the formation and shaping of traps,and the oil and gas migration; and the sustained active faults possess the common characteristics of the former two types.
引文
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张迎朝,陈志宏,李绪深,等.2011.珠江口盆地文昌B凹陷及周边油气成藏特征与有利勘探领域[J].石油实验地质,33(3):297-302.
张智武,刘志峰,张功成,等.2013.北部湾盆地裂陷期构造及演化特征[J].石油天然气学报:江汉石油学院学报,35(1):6-10.
崔莎莎,何家雄,陈胜红,等.2009.珠江口盆地发育演化特征及其油气成藏地质条件[J].天然气地球科学,20(3):385-391.
陈淑慧,张晓宇.2013.惠州凹陷西江-惠州转换带文昌组储层特征及控制因素研究[J].岩性油气藏,25(6):8-13.
邓运华,张功成,刘春成,等.2013.中国近海两个油气带地质理论与勘探实践[M].北京:石油工业出版社.
郭刚,邓运华,吴景富,等.2014.珠一坳陷北部洼陷带古近系潜在富生烃洼陷评价[J].中国海上油气,26(1):17-23.
黄保家,李俊良,李里,等.2007.文昌A凹陷油气成藏特征与分布规律探讨[J].中国海上油气,19(6):361-366.
何家雄,陈胜红,马文宏,等.2012.南海东北部珠江口盆地成生演化与油气运聚成藏规律[J].中国地质,39(1):106-117.
焦养泉,李思田,解习农,等.1997.多幕裂陷作用的表现形式:以珠江口盆地西部及其外围地区为例[J].石油实验地质,19(3):222-227.
刘志峰,刘志鹏,肖伶俐,等.2013a.珠三坳陷北部珠海组-韩江组沉积演化及储盖组合[J].海洋地质前沿,29(9):25-31.
刘志峰,王升兰,印斌浩,等.2013b.珠江口盆地珠Ⅰ、珠Ⅲ坳陷裂陷期湖相分布差异及其控制因素[J].石油实验地质,35(5):523-527.
李才,张迎朝,尤丽,等.2014.珠江口盆地文昌C凹陷成藏条件及勘探潜力分析[J].石油实验地质,36(3):346-351.
聂逢君,姜美珠,吴克强,等.2005.珠江口盆地构造岩浆活动与热流体的形成[J].东华理工学院学报,28(2):107-111.
彭光荣,温华华,刘从印,等.2013.珠江口盆地珠一坳陷浅层油气勘探实践及潜力探讨:以番禺4洼为例[J].海洋地质前沿,29(3):22-28.
邱忠建,龚再升.1999.中国油气勘探:第四卷:近海油气区[M].北京:地质出版社.
王有功.2011.断圈聚油机理及含油气性预测:以珠江口盆地东部番禺4洼和惠州凹陷为例[D].黑龙江大庆:东北石油大学.
沿海大陆架及毗邻海域油气区石油地质志编写组.1992.中国石油地质志:卷十六:沿海大陆架及毗邻海域油气区:下册[M].北京:石油工业出版社.
钟建强.1994.珠江口盆地的构造特征与盆地演化[J].海洋湖沼通报,(1):1-8.
张迎朝,陈志宏,李绪深,等.2011.珠江口盆地文昌B凹陷及周边油气成藏特征与有利勘探领域[J].石油实验地质,33(3):297-302.
张智武,刘志峰,张功成,等.2013.北部湾盆地裂陷期构造及演化特征[J].石油天然气学报:江汉石油学院学报,35(1):6-10.