Lithologic Reservoirs >

2012 , Vol. 24 >Issue 2: 16 - 20

DOI: https://doi.org/10.3969/j.issn.1673-8926.2012.02.004

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

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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.

Key words： petroleum preservation condition; coupling area between mountain and basin; Longmen Mountain; Sichuan Basin

Cite this article

ZHAO Jiancheng , LIU Shugen , SUN Wei , DAI Hansong , ZHANG Zhijing , DENG Bin . Extensional folds and their control effect on oil and gas accumulation:A case study from Beizhong sub-depression in Hailar Basin[J]. Lithologic Reservoirs, 2012 , 24(2) : 16 -20 . DOI: 10.3969/j.issn.1673-8926.2012.02.004

References

［1］ Janecke S U，Vanderburg C J，Blankenau J J. Geometry mechanism，and significance of extensional folds from examples in the Rocky Mountain Basin and Range province，U.S.A［J］． Journal of Structural Geology，1998，20（7）：841-856.
［2］ Jackson C A L，Gawthorpe R L，Sharp I R. Style and sequence of deformation during extensional fault-propagation folding：Examples from the Hammam Faraun and EI-Qaa fault blocks，Suez Rift，Egypt ［J］． Journal of Structural Geology，2006，28（3）：519-535.
［3］ Fanlds J E，Varga R J. The role of accommodation zones and transfer zones in the regional segmentation of extended terranes［J］. Geological Society of America Special Paper，1998，323：1-46.
［4］ Faulds J E，Olson E L，Harlan S S，et a1. Miocene extension and fault-related folding in the Highland Range，southern Nevada：A three-dimensional perspective ［J］. Journal of Structural Geology，2002，24（4）：861-886.
［5］ Khalil S M，McClay K R. Extensional fault-related folding，northwestern Red Sea，Egypt［J］. Journal of Structural Geology，2002，24（4）：743-762.
［6］ Morley C K，Nelson R A，Patton T L，et al. Transfer zones in the East African system and their relevance to hydrocarbon exploration in rifts［J］. AAPG Bulletin，1990，74（8）：1 234-1 253.
［7］ 汪新文.伸展褶皱作用及其油气勘探意义［J］.现代地质，2008，22（1）：60-69.
［8］ 赵贤正，降栓奇，淡伟宁，等.二连盆地阿尔凹陷石油地质特征研究［J］.岩性油气藏，2010，22（1）：12-17.
［9］ 樊俊雷，曹远志，韩伟.伸展断层相关褶皱作用研究进展［J］.内蒙古石油化工，2008，（22）：6-7.
［10］ 张彤，李忠权，蒙启安，等.构造变换带的识别及其在乌尔逊凹陷的应用［J］.岩性油气藏，2010，22（4）：52-56.
［11］ 彭建亮，姜茵华，李红英.海拉尔盆地贝中次凹南屯组一段储层特征分析及评价［J］.石油天然气学报，2010，32（6）：355-358.
［12］ 李坚，程慧，季敏.海拉尔盆地贝尔凹陷贝中次凹潜山成藏条件研究［J］.内蒙古石油化工，2009，（17）：122-123.
［13］ Schlische R W. Geometry and origin of fault-related folds in extensional settings［J］. AAPG Bulletin，1995，79（11）：1 661-1 678.
［14］ 张景廉，石兰亭，陈启林，等.柴达木盆地地壳深部构造特征及油气勘探新领域［J］.岩性油气藏，2008，20（2）：29-36.
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