刘薇;卢双舫;王民;张世祥;刘洋;周能武;关莹;王海龙;

• 1:中国石油大学(华东)地球科学与技术学院

• 2:大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

利用场发射扫描电镜、恒速压汞、高压压汞和低温氮气吸附等技术,对松辽盆地龙虎泡油田龙26外扩区青山口组二、三段致密砂岩储层储集空间类型,以及微观全孔喉直径分布进行定性及定量表征。结果表明:研究区致密储层物性较差,为低孔/超低孔—超低渗致密砂岩储层;储层的孔隙类型为残余粒间孔、长石和方解石溶蚀孔、晶间微孔和少量微裂缝,除压实作用外,方解石胶结和黏土矿物充填原生粒间孔是造成物性差的重要原因。厘定恒速压汞、高压压汞和低温氮气吸附三种实验联合表征的孔喉直径分布拼接点,用恒速压汞实验表征直径大于230nm的孔喉;用高压压汞实验表征直径介于20～230nm的孔喉;用低温氮气吸附实验表征直径小于20nm的孔喉;研究区致密砂岩储层孔喉直径为2～600nm,主要介于100～400nm,伴有极少量直径为200～600μm的孔隙,属于Ⅱ-Ⅲ类致密储层;小孔喉对致密储层渗透率的影响不大,但不能忽视对致密储层储集性的贡献。该研究结果为龙虎泡油田优质储层预测提供参考。

关键词(KeyWords)：孔喉结构;全孔喉直径表征;致密砂岩;高台子;龙26外扩区;龙虎泡油田;松辽盆地

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(41672116);; 国家科技重大专项(2016ZX05046-001-005);; 教育部中央高校自主创新科研计划项目(17CX05012)

作者(Author):刘薇;卢双舫;王民;张世祥;刘洋;周能武;关莹;王海龙;

Email:

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