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伸展褶皱及其对油气聚集的控制作用———以海拉尔盆地贝中次凹为例

  • 赵建成 ,
  • 刘树根 ,
  • 孙玮 ,
  • 代寒松 ,
  • 张志敬 ,
  • 邓宾
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  • 中国石油大庆油田有限责任公司勘探开发研究院
张莹(1982-),女,硕士,工程师,主要从事构造及勘探部署等方面的研究工作。地址:(163712)黑龙江省大庆市让胡路区勘探 开发研究院海拉尔勘探评价研究室。电话:(0459)5508408。E-mail:zhangying723@petrochina.com.cn

网络出版日期: 2012-04-20

Extensional folds and their control effect on oil and gas accumulation:A case study from Beizhong sub-depression in Hailar Basin

  • ZHAO Jiancheng ,
  • LIU Shugen ,
  • SUN Wei ,
  • DAI Hansong ,
  • ZHANG Zhijing ,
  • DENG Bin
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  • Research Institute of Exploration and Development, PetroChina Daqing Oilfield Company Ltd., Daqing 163712, China

Online published: 2012-04-20

摘要

贝中次凹是海拉尔盆地最富油气的构造单元之一,该区构造演化经历了断陷期、断-坳转换期和坳 陷期3 个阶段,形成了贝中次凹现今的复杂构造格局。西部断阶带、东部断阶带和中央洼槽带的低隆 起组成了典型的纵向均衡伸展褶皱。由于拉张和重力的联合作用,其内部产生了掀斜断块和滑动断阶等 类型的次级伸展构造样式。伸展褶皱是伸展盆地中重要的含油气构造,与其相关的有利圈闭、沉积相带是 油气聚集的有利场所。贝中次凹油气聚集严格受伸展褶皱作用的控制,即中央低隆起带为复式油气聚集 带,边界断层附近的滑动断阶有利于油气富集。

本文引用格式

赵建成 , 刘树根 , 孙玮 , 代寒松 , 张志敬 , 邓宾 . 伸展褶皱及其对油气聚集的控制作用———以海拉尔盆地贝中次凹为例[J]. 岩性油气藏, 2012 , 24(2) : 16 -20 . DOI: 10.3969/j.issn.1673-8926.2012.02.004

Abstract

Beizhong sub-depression is one of the richest oil and gas tectonic units in the Hailar Basin, and it experienced three stages, including rift period, rift-depression period and depression period, which shaped a current complex structure. The west fault-step belt, the east fault-step belt and the lowuplift belt of subsag comprised a typical longitudinal isostatic extensional fold. The actions of extensional stress and gravity created secondary structural styles in the extensional fold, such as tilted faulted-block and slide faulted-ramp. Extensional folds provide important structure of oilgas for extensional basins. The favorable traps and sedimentary facies related to extensional folds can accelerate the accumulation of oil and gas. Extensional folds play an important role in controlling oil and gas accumulation in Beizhong
sub-depression. Its role mainly embodies two respects: the center lowuplift belt is a multiple oil and gas accumulation zone; while the slide faulted-ramp near boundary faults is favorable for oil and gas accumulation.

参考文献

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