吉木萨尔凹陷二叠系芦草沟组咸化湖混合沉积模式

doi:10.7623/syxb201706003

石油学报 ›› 2017, Vol. 38 ›› Issue (6): 636-648.DOI: 10.7623/syxb201706003

吉木萨尔凹陷二叠系芦草沟组咸化湖混合沉积模式

马克¹, 侯加根¹, 刘钰铭¹, 史燕青¹, 闫林², 陈福利²

1. 中国石油大学地球科学学院北京 102249;
2. 中国石油集团科学技术研究院北京 100083

收稿日期:2016-06-29 修回日期:2017-02-17 出版日期:2017-06-25 发布日期:2017-07-08
通讯作者: 侯加根,男,1963年9月生,1985年获华东石油学院学士学位,1997年获石油大学(北京)博士学位,现为中国石油大学(北京)教授、博士生导师,主要从事油气田开发地质方面的研究和教学工作。Email:houjg63@cup.edu.cn
作者简介:马克,男,1988年9月生,2011年获东北石油大学学士学位,2014年获中国石油大学(北京)硕士学位,现为中国石油大学(北京)地球科学学院博士研究生,主要从事油气田开发地质方面研究。Email:779576547@qq.com
基金资助:
国家重点基础研究发展计划（973）项目（2015CB250901）资助。

The sedimentary model of saline lacustrine mixed sedimentation in Permian Lucaogou Formation,Jimsar sag

Ma Ke¹, Hou Jiagen¹, Liu Yuming¹, Shi Yanqing¹, Yan Lin², Chen Fuli²

1. College of Geosciences, China University of Petroleum, Beijing 102249, China;
2. CNPC Science and Technology Research Institute, Beijing 100083, China

Received:2016-06-29 Revised:2017-02-17 Online:2017-06-25 Published:2017-07-08

摘要/Abstract

摘要：

准噶尔盆地吉木萨尔凹陷二叠系芦草沟组是中国陆相非常规油气勘探的重要目标，通常认为芦草沟组沉积环境为咸化湖。在野外露头、井下岩心、岩石薄片、X射线衍射矿物分析及扫描电镜等观测资料的基础上，通过复杂岩相及沉积环境分析，认为吉木萨尔凹陷二叠系芦草沟组广泛发育典型的咸化湖相混合沉积，既包括混积岩，又包括混积层系。研究结果表明，芦草沟组致密油储层岩石矿物成分混杂，混积特征明显，宏观上表现为陆源碎屑岩、碳酸盐岩及火山碎屑岩所构成的交互沉积层系，微观上则表现为陆源碎屑组分、火山碎屑组分与碳酸盐组分所构成的混积岩。基于沉积环境与物源变化提出了3种混合沉积类型，分别是相缘混合沉积、母源混合沉积和突变式原地混合，同时建立了芦草沟组咸化湖背景的"多源同期、混合沉积"模式，并探讨了陆相咸化湖混合沉积对于致密油勘探的意义。

关键词: 吉木萨尔凹陷, 芦草沟组, 陆相致密油, 混合沉积类型, 混合沉积模式

Abstract:

The tight oil in Permian Lucaogou Formation, Jimsar sag is the important target of unconventional oil and gas in Chinese terrestrial facies. Based on outcrop surveying, borehole core observation,rock thin section, X-ray diffraction mineral analysis and scanning electron microscopy analyses, through analysis of complex lithology and sedimentary environment, we found that the typical saline lacustrine mixed sedimentation were extensively developed in the Permian Lucaogou Formation, Jimsar sag, which contains mixed sedimentary rocks and mixed sedimentary sequence. The research results show that the tight oil reservoir in Lucaogou Formation are consist of complex mineral compositions and multiple rock components, which embodied a strong obvious characteristic of mixed sedimentation. On the macro-scale, the mixed sedimentary sequence are characterized by interactive depositition of terrigenous clastic rocks, carbonate rocks and volcaniclastic rock, while the mixed sedimentary rocks are consist of terrigenous detrital, carbonate and pyroclastic debris in the micro. There are three genetic types of mixed sedimentation in this area include source mixing, edge facies mixing and mutational in-situ mixing. Then the "multi-sources in corresponding period" mixed sedimentary model was established for the saline lacustrine sedimentary environment and further discussed the significance of saline lacustrine mixed sedimentary research in tight oil exploration.

Key words: Jimsar sag, Lucaogou Formation, terrestrial tight oil, mixed sedimentary type, mixed sedimentary model

中图分类号:

TE122.3

马克, 侯加根, 刘钰铭, 史燕青, 闫林, 陈福利. 吉木萨尔凹陷二叠系芦草沟组咸化湖混合沉积模式[J]. 石油学报, 2017, 38(6): 636-648.

Ma Ke, Hou Jiagen, Liu Yuming, Shi Yanqing, Yan Lin, Chen Fuli. The sedimentary model of saline lacustrine mixed sedimentation in Permian Lucaogou Formation,Jimsar sag[J]. Acta Petrolei Sinica, 2017, 38(6): 636-648.

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吉木萨尔凹陷二叠系芦草沟组咸化湖混合沉积模式

The sedimentary model of saline lacustrine mixed sedimentation in Permian Lucaogou Formation,Jimsar sag

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