收稿日期: 2012-07-26
修回日期: 2012-08-19
网络出版日期: 2013-02-10
基金资助
中国石化科技攻关项目“梨树断陷油气成因与运聚特征研究”(编号：P09021)资助．
Genetic Type and Distribution of the Oils in Lishu Fault Depression,Songliao Basin
Received date: 2012-07-26
Revised date: 2012-08-19
Online published: 2013-02-10
通过对梨树断陷不同地区不同层位原油色谱、色谱/质谱等地球化学分析，系统地解剖了原油的地球化学特征。根据原油生物标志化合物组合特征的差异，将梨树断陷的原油划分为3种类型：Ⅰ类原油主要分布于东南斜坡带与四五家子油气田，具有较高的C24四环萜烷/C26三环萜烷值，较低的三环萜烷/五环三萜值、γ-蜡烷/C30藿烷值、Ts/Tm值、C29Ts/C29降藿烷值、C30重排藿烷/C30藿烷值和C29ββ/(ββ+αα)甾烷值；Ⅱ类原油主要分布在北部斜坡带，具有较低的C24四环萜烷/C26三环萜烷值，较高的三环萜烷/五环三萜值、γ-蜡烷/C30藿烷值、Ts/Tm值、C29Ts/C29降藿烷值、C30重排藿烷/C30藿烷值和C29ββ/(ββ+αα)值；Ⅲ类原油主要分布于中央构造带，各参数介于Ⅰ类和Ⅱ类原油之间.最后结合原油物性特征，建立了不同类型原油的地球化学判识指标，明确了原油的成因与来源。
张俊，张敏 . 松辽盆地梨树断陷原油成因类型与分布[J]. 天然气地球科学, 2013 , 24(1) : 116 -122 . DOI: 10.11764/j.issn.1672-1926.2013.01.116
Based on GC and GC-MS analyses of bulk crude oil and source rock samples in different regions and layers of Lishu Fault Depression,the geochemical characteristics of crude oil and source rocks were systematically studied.According to different composition characteristics of the biomarkers,the crude oils in the Lishu Fault Depression were divided into three genetic types.The GroupⅠ,mainly distributed in the southeastern slope belt and Siwujiazi oilfield,were characterized by high C24-tetracyclic/C26-tricyclic terpanes ratios,and low tricyclene/pentacyclictriterpane,gammacerane/C30-hopane,Ts/Tm,C29Ts/C29norhopane,C30 diahopane/C30-hopane and C29ββ/（ββ+αα）ratios;The GroupⅡ,mainly found in the northern slope belt,have low C24-tetracyclic/C26-tricyclic terpanes value,and high tricyclene/ pentacyclictriterpane,gammacerane/C30-hopane,Ts/Tm,C29Ts/C29 norhopane,C30 diahopane/C30-hopane and C29ββ/(ββ+αα） ratios.The Group Ⅲ,mainly located in the central structural zone and seven tree synclinore zone,display the intermediate chemical compositions between the GroupⅠand Group Ⅱ oils.Combined with the physical properties of crude oils,geochemical indicators to different types of crude oil are established,and the genesis and sources of crude oil were defined.
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