Sand prevention agent for achieving auto-aggregation of sand grains

The invention belongs to the technical field of petroleum development, and particularly relates to a sand prevention agent for achieving auto-aggregation of sand grains. The sand prevention agent comprises three parts including an auto-aggregation liquid, an auto-aggregation auxiliary agent and a sand consolidation agent. Main ingredients of the auto-aggregation liquid are natural polysaccharide compounds, and main ingredients of the auto-aggregation auxiliary agent are inorganic salt. The sand prevention agent achieves auto-aggregation of the sand grains through the synergistic effect among chemical agents of the sand prevention agent, the stratum sand grains can be packaged and clustered to be fixed to corresponding positions of the stratum, the consolidation effect is obviously improved, the actuating range is expanded, and a good sand consolidation effect can be achieved on fine-powder sand. 本发明属于石油开发的技术领域，具体的涉及一种实现砂粒自聚的防砂剂。该防砂剂包括自聚液、自聚助剂和固砂剂三部分；其中自聚液主要成分为天然多糖类化合物，自聚助剂主要成分为无机盐。该防砂剂通过其化学剂之间的协同作用实现了砂粒自聚，能够将