宏观藻类化石在沉积相研究中的意义  

RESEARCH SIGNIFICANCE OF MACRO-ALGAE FOSSILS IN THE STUDY OF SEDIMENTARY FACIES IN ANSAI OILFIELD

作　　者：崔攀峰 李健 胡海涛 张永强 

机构地区：[1]长庆石油勘探开发研究院,陕西西安710021

出　　处：《石油学报》2000年第5期36-38,共3页Acta Petrolei Sinica

摘　　要：安塞油田长 6油层发现了大量的淡水宏观藻类化石 ,证实了中生界宏观藻类的存在。淡水宏观藻类主要生长在山涧溪流与湖泊中 ,而前者水流急 ,不易保存 ,所以宏观藻类化石主要保存于水体相对平静的湖泊中。宏观藻类化石是可靠的淡水湖泊的生物标志和水下的代表性生物群落。安塞油田长 6油层的宏观藻类化石主要有六个属种 ,可分为四个不同的类型 ,这四个类型不同的结构特点分别反映了水体的深浅与平静程度。同时也代表了四个不同的沉积区域 ,为沉积微相与产出组合的划分提供了直接的依据。A large number of limnetic macro algae fossils were found in the Chang6 reservoir in Ansai Oilfield,which proved the existence of macro algae in the Mesozoic.The limnetic macro algae grow mainly in mountain streams,brooks and lakes.Because of a little bit rapid flowing in the streams or brooks,macro algae fossils were not easily preserved.Therefore they were essentially preserved in lakes,where the water body is relatively calm.Macro algae fossils are liable biological markers of freshwater lakes and typical underwater biocoen. Macro algae fossils in the Chang6 reservoir in Ansai Oilfield have mainly six genera that can be divided into four categories.Different structures of the four categories reflect different depth and degree of calmness of the water body,and represent four sedimentary regions,which instructed the division of sedimentary micro facies and the output combinations.

关 键 词：宏观藻类化石 生态环境 沉积相 安塞油田 

分 类 号：TE121.31[石油与天然气工程—油气勘探] P618.130.2[天文地球—矿床学]