西安石油大学学报（自然科学版）2025，Vol.40Issue(5)：41-48,8.DOI:10.3969/j.issn.1673-064X.2025.05.005
孔隙限域条件下古龙页岩流体相态特征
Study on Phase Behavior of Fluid in Gulong Shale Pores
摘要
Abstract
The Songliao Basin is rich in unconventional oil and gas resources,and the efficient development of shale oil is of important strategic significance.However,the complex lithology and significant pore scale confinement effect in the region affect the accurate eval-uation of key phase parameters of shale oil,posing a huge challenge for the effective development of shale oil in the area.The purpose of this study is to explore the influence of pore confinement effect on the phase characteristic parameters of Gulong shale oil,clarify the oc-currence state of formation fluids,and provide theoretical basis for efficient development of Gulong shale oil.Based on oil sample data from 8 typical wells,the formation fluids were compounded in laboratory,and high-temperature high-pressure fluid phase analysis experi-ments were carried out so as to obtain complete fluid phase data.The phase parameters of alkanes were evaluated under pore throat radii of5nm,50nm,and 500nm using microfluidic technology,it was confirmed that pore confinement effect has a significant impact on the phase parameters of formation fluids.A phase correction method for the full cycle and the full temperature-pressure domain at the micro nano scale is established.The research results indicate that:(1)the pore confinement effect can lead to a decrease in the saturation pressure of Gulong shale oil,and this effect increases with the decrease of pore radius.(2)Shale oil is in liquid form under reservoir conditions and belongs to light crude oil.(3)It is recommended to use high-pressure fluid injection to transform the reservoir seepage channel,and combine it with CO2 pressure holding production technology to improve the development efficiency of shale oil.The re-search results can provide important theoretical support for the overall development plan of Gulong shale oil.关键词
古龙页岩油/相态分析/孔隙限域效应/微流控Key words
Gulong shale oil/phase behavior analysis/pore confinement effect/microfluidics分类
能源科技引用本文复制引用
宋振龙,张可,张一军,程耀泽,李明,李傲..孔隙限域条件下古龙页岩流体相态特征[J].西安石油大学学报（自然科学版）,2025,40(5):41-48,8.基金项目
国家科技重大专项"CO2促混转混综合调控技术研究"(2024ZD1406601) （2024ZD1406601）
中国石油天然气股份有限公司重大科技专项"提高原油采收率新方法与新技术研究"(2023ZZ04)和"塔里木盆地超深层缝洞型碳酸盐岩油藏开发机理与技术对策研究"(2024DJ10) （2023ZZ04）
