西安石油大学学报（自然科学版）2024，Vol.39Issue(5)：19-26,42,9.DOI:10.3969/j.issn.1673-064X.2024.05.003
基于低温氮吸附实验的页岩油储层微观孔隙结构
Study on Micro Pore Structure Characteristics of Shale Oil Reservoirs Based on Low Temperature Nitrogen Adsorption Experiment
摘要
Abstract
In order to study the micro pore structure characteristics of shale oil reservoir,taking the shale oil reservoir samples of Qings-hankou Formation in Songliao Basin as an example,the characteristics and influencing factors of micro pore structure of the shale oil reservoir are studied based on low-temperature nitrogen adsorption and combined with SEM,TOC and X-ray diffraction.The experimen-tal results show that the organic matter in the studied reservoir section is enriched and mature,which is conducive to hydrocarbon accu-mulation;It is mainly composed of clay minerals,with an average volume fraction of 42.6％;Its low-temperature nitrogen absorption/de-sorption curve belongs to type Ⅱ+IV composite curve and produces H3 hysteresis ring,indicating that the pore structure is complex and irregular,mainly including slit flat hole and wedge-shaped hole;Micro pores and mesopores contribute the main pore specific surface ar-ea and pore volume;Based on FHH fractal model,pores have significant fractal characteristics,the fractal dimension is between 2.67～2.75 and the correlation coefficient is more than 0.92,indicating that the pore space is small,the pore structure is complex and the het-erogeneity is strong.TOC and clay minerals are conducive to the development of mesopores and micro pores,which is the main factors affecting the micropore structure of shale oil reservoir.关键词
页岩油储层/微观孔隙结构/低温氮吸附实验/FHH分形模型/影响因素Key words
shale oil reservoir/micropore structure/low temperature nitrogen adsorption experiment/FHH fractal model/influence factor分类
石油、天然气工程引用本文复制引用
方朝强,万金彬,杨林,夏阳,肖占山,赵建斌..基于低温氮吸附实验的页岩油储层微观孔隙结构[J].西安石油大学学报（自然科学版）,2024,39(5):19-26,42,9.基金项目
中国石油天然气集团公司科学研究与技术开发项目"测井数字岩石技术研究"(2021DJ4003) （2021DJ4003）
中国石油集团测井有限公司十大科技项目"岩石物理实验分析技术研究与应用"(CNLC2022-08B01) （CNLC2022-08B01）
