新疆石油地质

新疆石油地质 ›› 2003, Vol. 24 ›› Issue (6): 527-529.

• 油气勘探 • 上一篇    下一篇

陆相断陷盆地缓坡弯折带研究——以南阳凹陷为例

程喆1,2, 朱伟1,3, 谭承军1, 魏福军1, 王正付1,2   

  1. 1.中国地质大学,北京 100083;
    2.中国石化 河南油田分公司,河南 南阳 473132;
    3.中国石化新星石油公司中南局,湖南 长沙 411104
  • 收稿日期:2003-01-09 出版日期:2003-12-01 发布日期:2020-08-24
  • 作者简介:程喆(1964-), 男,河南南阳人,高级工程师,在读博士研究生,油气成藏动力学及地质综合研究。联系电话:0377-3830643

Study of Gentle Slope-Break Zone in Continental Downfaulted L acustrine Bas—An example of Nanyang seg

CHENG Zhe1,2, ZHU Wei1,3, TAN Chen-jun1, WEI Fu-jun1, WANG Zheng-fu1,2   

  1. 1. China University of Geosciences, Beijing 100083, China;
    2. Henan Oilfield Company, Sinopec, Nanyang, Henan 473132, China;
    3. Central-South Bureau, New Star Oil Company, Changsha 411104, China
  • Received:2003-01-09 Online:2003-12-01 Published:2020-08-24

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摘要： 陆相断陷湖盆缓坡区弯折带是指由同沉积控凹铲式断层长期活动产生的沉积斜坡带。南襄盆地南阳凹陷的研究表明,凹陷南部控凹铲状正断层在非平面上滑动造成凹陷北部的缓坡沉积坡折,制约了盆地可容纳空间的变化,控制了湖盆低位体系域和轴向高位湖三角洲砂体的分布范围。因此,通过建立弯折带内部层序地层格架,研究其特征、空间展布规律,确定各层序发育时的弯折带即低位滨线,再沿低位滨线内(或弯折带内)找寻大型低位扇体,建立低位砂岩储集体分布的预测模型,成为南阳凹陷隐蔽油气藏勘探突破的关键。

关键词: 陆相盆地, 断陷盆地, 斜坡带, 南阳凹陷, 断层, 沉积, 层序地层学, 三角洲

Abstract: The gentle slope-break zone in continental fault lacustrine basin is referred to as a depositional slope zone resulted from long-term activity of syndepositional listric faults. It is shown from study of Nanyang seg in Nanxiang basin that the nonplane gliding listric normal faults in southern Nanyang seg allow to shaping gentle slope break zone in northern Nanyang seg, thus constraining the variation of holding spaces in this basin,controlling the distribution scope of low stand system tract and high stand lacustrine delta sands in axial orientation. This paper develops framework of inner stratigraphic sequence of the slope-break zone,studies its features and spatial distribution,determines the low stand shore line of this zone developed in each sequence,from which searches for large scale low stand fans,hence establishes the model for predicting distribution of the low stand,sandstone reservoir. The result can be as guide for, exploration of subtle oil-gas reservoir in Nanyang seg.

Key words: Nanyang seg, fault, deposition, sequence stratigraphy, fan, delta

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