陆架坡折带的识别及其与油气藏的关系——以番禺低隆起—白云凹陷北坡21Ma陆架坡折带为例
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
番禺低隆起一白云凹陷北坡地区是珠江口盆地最有利的油气勘探区域之一,如何在现有勘探成果的基础上进一步拓展勘探领域,对珠江口盆地东部天然气勘探的持续发展有着重要的意义。以层序地层学原理为指导,结合地震、测井、钻井、古生物等资料,分析表明该区的沉积特征主要受控于特殊的古地理位置——陆架坡折带,通过多种研究方法,确定出21 Ma陆架坡折带的分布范围,总结了其与油气藏的关系。21 Ma陆架坡折线呈弧形向海盆方向分布,大致与番禺低隆起和白云凹陷的分界线平行,西侧为近东西向,向东则逐渐向北东方向延伸。陆架坡折带对隐蔽油气藏的成藏具有重要控制作用,该区主要存在3种与陆架坡折带发育有关的油气藏类型,即构造油气藏、岩性油气藏、构造-岩性油气藏。
Panyu low uplift-north slope of Baiyun depression is one of the most favorable oil and gas accumulation zone of Pear River Mouth Basin.Five gas fields have been found by far in this area which are PY30-1,PY34-1,PY35-2,PY35-1 and LH19-5 gas field and multiple gas-bearing structures.The OGIP is about 120 billion cubic meters.How to extend new oil and gas exploration areas on the basis of exploration results is significant for the sustainable development of the natural gas exploration in Pearl River Mouth Basin.In this paper,we have found that the depositional characteristics of this area is controlled by the continental shelf break on the basics of previous research and basics principle of sequence stratigraphy and the seismic data,well log curves and paleontology,and we have identified the shelf break and determined its distribution range,then the conditions and rules of oil-gas reservoir of this area is summarized.We think that there are mainly three types of oil-gas reservoir in this area: structural reservoir,lithological reservoir and structural-lithological reservoir.
引文
[1]田继军,姜在兴,李熙喆,等.川西前陆盆地上三叠统岩性地层圈闭勘探前景分析[J].油气地质与采收率,2009,16(1):22- 25.
    [2]谢钦春,叶银灿,陆炳文.东海陆架坡折地形和沉积作用过程[J].海洋学报,1984,6(1):61-71.
    [3]庞雄,陈长民,施和生,等.相对海平面变化与南海珠江深水扇系统的响应[J].地学前缘,2005,12(3):167-177.
    [4]庞雄,彭大钧,朱明,等.南海珠江深水扇系统的层序地层学研究[J].地学前缘,2007,14(1):220-229.
    [5]庞雄,陈长民,彭大钧,等.南海珠江深水扇系统及油气[M].北京:科学出版社,2007:144-150.
    [6]董伟,林畅松,秦成岗,等.珠江口盆地番禺低隆起韩江组高精度层序格架和沉积样式与岩性地层圈闭的发育分布[J].现代地质,2008,22(5):794-802.
    [7]董伟,林畅松,谢利华,等.珠江口盆地番禺隆起东南缘断裂坡折带及其对低位域构造—岩性油气藏的控制作用[J].地球学报,2009,30(2):256-262.
    [8]张忠涛,施和生,秦成岗,等.番禺低隆起—白云凹陷北坡断层封闭性研究[J].断块油气田,2010,17(1):24-27.
    [9]王英民,刘豪,李立诚,等.准噶尔大型坳陷湖盆坡折带的类型和分布特征[J].地球科学——中国地质大学学报,2002,27 (6):683-688.
    [10]林畅松,潘元林,肖建新,等.“构造坡折带”——断陷盆地层序分析和油气预测的重要概念[J].地球科学——中国地质大学学报,2000,25(3):260-265.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心