西安石油大学学报（自然科学版）2025，Vol.40Issue(3)：75-81,7.DOI:10.3969/j.issn.1673-064X.2025.03.008
基于核磁技术优选页岩储层增能介质
Optimization of Energy Enhancing Media for Shale Oil Reservoirs Based on Nuclear Magnetic Technology
戴志鹏 1李太伟 1王彪 1朱杰 1虞建业1
作者信息
- 1. 中国石化江苏油田分公司石油工程技术研究院,江苏扬州 225001
- 折叠
摘要
Abstract
Based on nuclear magnetic resonance(NMR)technology,the enhanced imbibition oil recovery ability of fracturing fluid,conventional surfactant AES and CO2 in shale reservoirs was investigated.According to the matrix-fracture forced imbibition model,the technical idea of increasing imbibition ability of the reservoirs is to reduce oil viscosity,improve formation wettability and appropriate oil-water interface activity.The gas-liquid synergism oil displacement effect was evaluated by enhanced imbibition agent FD1.The re-sults show that the macromolecular fracturing fluid is difficult to enter the shale matrix,and the imbibition agent FD1 huff-puff can greatly increase the oil recovery rate to 37.52％.The huff-puff effect of CO2 gas is obviously better than that of CH4 and N2,and CO2huff-puff of 5 cycles can enhance the recovery degree of crude oil to 38.28％,and the recovery degree can further be increased by about 24％ under the synergic action of imbibition agent FD1.The imbibition system suitable for shale oil in Subei Basin is determined to be CO2+imbibition agent FD1.From the perspective of mechanism of action,CO2 has a good displacement effect on the adsorption oil in small pores,and can drive a small amount of free oil.The imbibition agent FD1 mainly acts on medium-large pores,improving the wettability of reservoir and making the adsorption oil easy to be stripped off.The strong interfacial activity is more convenient to displace the free oil,and the adsorbed oil and free oil are further reduced after imbibition.This study provides theoretical support for the selection of oil displacement media and the increase of reservoir permeability.关键词
渗吸实验/渗吸剂/吞吐/核磁共振/页岩油Key words
imbibition experiment/imbibition agent/huff-pufft/nuclear magnetic resonance/shale oil分类
石油、天然气工程引用本文复制引用
戴志鹏,李太伟,王彪,朱杰,虞建业..基于核磁技术优选页岩储层增能介质[J].西安石油大学学报（自然科学版）,2025,40(3):75-81,7.
