藻层

酒泉盆地下白垩统藻纹层分布特征及其与油气的关系

Laminar Algal Distribution Characteristics of Lower Cretaceous and the Relation to Oil-gas of Jiuquan Basin

藻纹层的分布与发育都受到沉积相及相变的控制。

The distribution and yield of laminar algal are all controlled by sedimentary facies and its change .

藻纹层含量与源岩的生烃潜力呈正相关关系。

There has a positive correlation between the content of laminar algal and the hydrocarbon generating potentiality of source rock .

此类原油主要源于青西凹陷下沟组沉积于较强还原环境的藻纹层泥质白云岩。

This type oil is mainly from the laminar algal shaly dolomite of Xiagou formation that deposited in the reduction environment of Qingxi Depression region .

通过有机岩石学研究，在本区下白垩统源岩中发现了荧光性极强的藻纹层。

For the first time , the algae laminae with strong fluorescence are found out in the Cretaceous source rocks through the research of organic petrology .

藻纹层灰岩和藻叠层灰岩发育于相对稳定的滨浅湖环境，其发育规模和储层性质主要受沉积环境的稳定性、早期淋溶程度和晚期胶结充填强度的控制。

The scale of development and reservoir quality of laminar algal limestone and stromatolite algal limestone are controlled by the sedimentary environment , early solution and late cementation .

藻灰岩储层FMI图像呈絮状或云朵状，外部边界不平直，内部构造不均匀，层理无规律，局部有溶蚀现象；

The FMI image of alga limestone reservoir features in floc or cloud-like , outer boundary being not straight , asymmetry internal structure , disorder bedding , local dissolution ;

E32地区储层岩性识别困难，岩性不纯，多为泥灰岩或藻灰岩储层，单纯的利用岩心观察，试油资料，物性资料及常规测井资料来判断地层岩性是非常困难的。

The lithology of the Gasi reservoir is difficult to identify . Most lithology is muddy limestone or algal limestone . It is very difficult to decide the formation lithology just using core observation , oil production testing data , physical property data and conventional logging data .

柴达木盆地跃西地区藻灰岩储层的测井识别

Identification of algal limestone reservoir with logging in Yuexi area , qaidam Basin

藻灰岩储层在测井曲线上显示出较高的自然伽马值，在地震剖面上表现为强反射特征。

Algal limestone reservoirs appear to have relatively high gamma ray value in well logs and strong reflectance signatures in seismic profiles .

柴达木盆地第三系藻灰岩储层分布较广，是柴达木盆地第三系碳酸盐岩储层中最重要的油气储层。

Distributed in extensive areas , Tertiary algal limestone reservoirs in Qaidam Basin are the most important oil and gas reservoirs in the Tertiary carbonate rock reservoirs in the basin .