页岩油藏提高采收率技术及展望

doi:10.11885/j.issn.16745086.2020.04.07.01

摘要/Abstract

摘要： 通过调研近二十年国内外页岩油藏提高采收率技术的室内研究和现场应用，结合页岩油藏储层特征，总结了开发过程中的难点，并针对各类提高页岩油藏采收率技术的作用机理，讨论了对页岩油藏的适应性。研究表明，注气是页岩油藏补充地层能量的最佳方法，二氧化碳和天然气是常用的注入介质，但其作用机理还有待深入探讨；通过改善储层润湿性来提高渗吸效果是表面活性剂和低矿化度水的主要机理；泡沫驱拥有良好注入性的同时能够有效调整裂缝性油藏的非均质性，但是其在裂缝中的稳定性有待加强；热力采油可以改变储层的热应力，诱导裂缝扩张，增大注入介质的波及范围。溶剂和纳米材料在机理上有改善页岩储层润湿性的作用，但是其在页岩油藏开发中的可行性还有待验证。

关键词: 页岩油藏, 提高采收率, 非常规油气, 机理研究, 综述

Abstract: Through the investigation of the indoor research and field application of EOR technologies in shale oil reservoirs at home and abroad in the past 20 years, the difficulties in the development process are summarized in combination with the characteristics of shale oil reservoirs, and the adaptability of various EOR mechanisms to shale oil reservoirs. The results show:The gas injection is the best way to supply energy for shale reservoir. Carbon dioxide and natural gas are the normal injection media and the displacement mechanism needs further investigation. The wettability alteration to enhance the performance of imbibition effect is the main mechanism for surfactant and low salinity water flooding. Foam has the good performance in adjusting the heterogeneity but its stability needs to be enhanced. Thermal methods can change the thermal stress of the shale formation and thus induce the propagation of fracture to increase the sweep efficiency. In theory, solvent and nano-based material can also improve the wettability of shale reservoir, but its adaptation needs further discussion.

Key words: shale reservoir, enhanced oil recovery, unconventional resource, mechanism investigation, review

中图分类号:

TE357

李一波, 何天双, 胡志明, 李亚龙, 蒲万芬. 页岩油藏提高采收率技术及展望[J]. 西南石油大学学报(自然科学版), 2021, 43(3): 101-110.

LI Yibo, HE Tianshuang, HU Zhiming, LI Yalong, PU Wanfen. A Comprehensive Review of Enhanced Oil Recovery Technologies for Shale Oil[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(3): 101-110.

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