压裂-驱油一体化工作液研究进展

Research progress on fracturing-oil displacement integrated working fluid

随着石油工业对降低成本、绿色环保问题的日益关注,对于兼具压裂、驱油双重功效的工作液的研究越来越受到重视。为了更好地研究压裂-驱油一体化工作液体系,综述了返排液驱油体系和驱油压裂液体系的组成、驱油性能研究现状及现场应用情况,并对其发展进行展望。返排液驱油体系的构建均基于清洁压裂液尤其是以阳离子表面活性剂为主要成分的清洁压裂液;驱油压裂液体系包括清洁驱油压裂液体系、聚合物驱油压裂液体系、滑溜水驱油压裂液体系及其他类型驱油压裂液体系,其中驱油增效性清洁压裂液是最具潜力的。降低成本、增强耐高温性能、加强微观结构和静、动态流变性能机理研究是压裂-驱油一体化工作液未来研究的关键。对现场应用与室内实验研究结果进行对比,进一步完善压裂液返排液驱油体系也是未来的重要工作方向。

With the increasing concern of the oil industry about cost reduction and environmental protection,ever more at⁃tention has been paid to the research on the working fluid capable of both fracturing and oil displacement.For the further study on the fracturing-oil displacement integrated working fluid,the research on the composition,the oil displacement per⁃formance,and the field application of the oil displacement system of fracturing flowback fluid and the oil-displacement fracturing fluid system were reviewed,and future developments were forecasted.The construction of the oil displacement system of fracturing flowback fluid is based on clean fracturing fluid,especially the one with cationic surfactant as the main component;the oil-displacement fracturing fluid system includes the ones based on clean fracturing fluid,polymer,slickwa⁃ter,etc.,among which the clean oil-displacement fracturing fluid system with enhanced efficiency presents the greatest po⁃tential.Reducing cost,enhancing high temperature resistance,and strengthening the study on microstructure and static and dynamic rheological properties are the keys to the future research on the fracturing-oil displacement integrated working flu⁃id.The comparison between the field application and laboratory test results demonstrates that further improving the oil dis⁃placement system of fracturing flowback fluid also represents an important direction for the future work.