| 酒泉盆地下白垩统藻纹层分布特征及其与油气的关系 |
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| 引用本文： | 马立元,程克明,刘大锰,熊英.酒泉盆地下白垩统藻纹层分布特征及其与油气的关系[J].沉积学报,2007,25(1):147-153. |
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| 作者姓名： | 马立元 程克明 刘大锰 熊英 |
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| 作者单位： | 中国石油化工股份有限公司石油勘探开发研究院,北京,100083;中国石油天然气股份有限公司勘探开发研究院,北京,100083;中国地质大学,北京,100083 |
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| 基金项目： | 中国科学院资源环境领域重大重要方向项目
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国家自然科学基金 |
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| 摘 要： | 酒泉盆地下白垩统纹层状泥质白云岩和白云质泥岩中有机纹层（藻纹层）结构发育，但非均质性很强，主要表现在相同层位不同地区及同一钻井不同深度藻纹层的含量悬殊。藻纹层的分布与发育都受到沉积相及相变的控制。藻纹层主要是由浮游藻类及其降解产物组成，藻类以绿藻门绿枝藻科的圆球藻为主要属种。藻纹层含量与源岩的生烃潜力呈正相关关系。酒西坳陷已发现的大部分原油主要源于下白垩统下沟组藻纹层泥质白云岩，表明藻纹层是酒泉盆地很重要的一种生烃物质，与酒泉盆地的油气具有密切的成生联系。富含有机质纹层的湖相碳酸盐岩不仅是优质的烃源岩，而且由于其生烃物质的层状富集，在生、排烃过程中，更有利于间隙微裂缝的形成和排烃。
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| 关 键 词： | 酒泉盆地 藻纹层灰岩 非均质性 圆球藻 成生联系 |
| 文章编号： | 1000-0550（2007）01-0147-07 |
| 收稿时间： | 2006-03-21 |
| 修稿时间： | 2006-07-18 |
Laminar Algal Distribution Characteristics of Lower Cretaceous and the Relation to Oil-gas of Jiuquan Basin |
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| MA Li-yuan,CHENG Ke-ming,LIU Da-meng,XIONG Ying.Laminar Algal Distribution Characteristics of Lower Cretaceous and the Relation to Oil-gas of Jiuquan Basin[J].Acta Sedimentologica Sinica,2007,25(1):147-153. |
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| Authors: | MA Li-yuan CHENG Ke-ming LIU Da-meng XIONG Ying |
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| Institution: | Research Institute of Petroleum Exploration and Development, SINOPEC, Beijing 100083 |
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| Abstract: | The organic laminae (laminar algal) in the argillaceous limestone and dolomitic mudstone of lower Cretaceous are abundant in Jiuquan basin, but it′s heterogeneity is obvious that mainly shows that the difference of laminar algal contents are very large between the same formation and different areas and same well and different depth. The distribution and yield of laminar algal are all controlled by sedimentary facies and its change. The laminar algal are mainly composite by planktonic algae and it′s pyrolysis products, and most of the algal are the Granoreticella of Chlorophyta . There has a positive correlation between the content of laminar algal and the hydrocarbon generating potentiality of source rock. Most of the found oil in Jiuxi depression is mainly generated from the laminar algal argillaceous limestone of Xiagou Formation of lower Cretaceous, which means that laminar algal is a very important hydrocarbon generating material; it has closed relationship with oil gas in Jiuquan basin. Not only the lacustrine carbonate with abundant organic laminae is good source rock, but also favorable in the fracture initiation and hydrocarbon drainage during the course of hydrocarbon generating and drainage because of the bedded enrichment of hydrocarbon generating materials. |
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| Keywords: | Jiuquan basin laminar algal dolostone heterogeneity Granoreticella generation relation |
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