摘要
松辽盆地三肇凹陷青山口组地层中蕴藏着大量的页岩油资源,但由于开发较晚,三肇页岩油的富集模式与甜点预测等相关问题仍需深入研究。文章以肇页1井为研究对象,从页岩的烃源岩及储层特征研究为出发点,通过薄片及扫描电镜观察、有机碳含量与岩石热解分析、岩石矿物组分分析等实验方法,深入研究了三肇页岩油的富集主控因素与富集模式,并预测了甜点层段。研究表明,三肇页岩油存在三类页岩油富集模式,即页理型、纹层型与夹层型富集模式,其中,页理型页岩油富集模式表现出极好的含油性,其生烃潜力高,储集能力好,且页理缝、粒间孔以及有机质孔缝极其发育;纹层型页岩油的含油性次之,其生烃潜力较大,水平渗透率较高;夹层性页岩油由于生烃能力较差和储集能力不足,含油性较差。根据肇页1井的优势岩相,结合其含油性与储集物性等地质参数,预测并优选出四个甜点段,其中,页理型甜点主要分布在青一段地层中,而纹层型与夹层型甜点主要分布在青二、三段地层中。
The Qingshankou Formation in the Sanzhao sag,the Songliao Basin,holds substantial shale oil resources,but its accumulation patterns and sweet spot prediction have not been fully understood.Taking the ZY1 Well as an example,this study is focused on the source rock and reservoir characteristics of the shale.We determine the shale oil enrichment patterns and sweet spots distribution by microscopic examination,organic carbon and rock-eval analysis,and rock mineral composition analysis.The results indicate that there are three modes of shale oil accumulation in the study area:shaley,laminar,and interbedded types.In addition,the shaley type shows the greatest shale oil enrichment with good storage capacity,well-developed fissures,grain pores,and organic matter-filled pores.Laminar type has relatively good hydrocarbon generating potential and permeability,while the interbedded shale oil has low oil content due to the low hydrocarbon generating potential and poor storage capacity.Based on the classification of lithofacies and other geological parameters such as oil-bearing potential and reservoir properties of the ZY1 Well,four intervals of sweet spots are predicted.Shaley sweet spots mainly occur in the member 1 of the Qingshankou Formation,while laminated-and interbedded-type sweet spots are primarily found in the members 2 and 3.
作者
陈睿倩
白昕
李琦
吴霞
周海燕
黄铖铮
CHEN Ruiqian;BAI Xin;LI Qi;WU Xia;ZHOU Haiyan;HUANG Chengzheng(State Key Laboratory of Petroleum Resources and Engineering,China University of Petroleum(Beijing),Beijing 102249,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;Research Institute of Petroleum Exploration&Development,China National Petroleum Corporation,Beijing 100083,China)
出处
《高校地质学报》
北大核心
2025年第4期486-497,共12页
Geological Journal of China Universities
基金
国家自然科学基金(41702126)资助。
关键词
三肇页岩油
富集模式
甜点预测
青山口组
松辽盆地
Sanzhao shale oil
enrichment pattern
sweet spots prediction
Qingshankou Formation
Songliao Basin
