转向压裂暂堵剂的研究及应用进展

The Progress in Research and Application of Temporary Plugging Agent for Diverting Fracturing

随着转向压裂技术的广泛应用,在该技术中起重要作用的暂堵剂也有很大的发展。然而解堵后暂堵剂难以完全溶于返排流体中,由此引起的地层伤害问题在暂堵剂的使用中一直难以消除,影响着储层的可持续开发。因此,结合暂堵剂的国内外研究现状,根据解堵方式的不同将暂堵剂分成酸溶性、水溶性和油溶性三类,对其应用、暂堵机理、优缺点、地层伤害情况及发展趋势等方面进行了综述。认为残渣量小、封堵强度高的水溶性暂堵剂是未来研究重点,其中具有自清洁性的可降解暂堵剂也是有潜力的发展方向。

With the wide application of the diverting fracturing technology,the temporary plugging agent has also greatly developed,which plays an important role in the technology.However,it is difficult to completely dissolve in the flowback fluid for temporary plugging agent after removing plugging,which causes the formation damage in the process of using temporary plugging agent,which affects the sustainable development of the reservoir.Therefore,combined with the current research status of at home and abroad,according to different ways of plugging removal,temporary plugging agent can be divided into acid soluble temporary plugging agent,water-soluble temporary plugging agent and oil soluble temporary plugging agent.and an overview of its application,its mechanism of temporary plugging,advantages and disadvantages,formation damage and the trend of development were discussed.Moreover it is thought that water soluble temporary plugging agent with a small amount of residue and high strength plugging is the focus of future research.And degradable temporary plugging agent with self-cleaning property also is a potential development direction.