随着油田开发进入中后期，油田综合含水普遍升高，液面下降，其结蜡特点也随着改变，以往的清防蜡措施在新的条件下矛盾日趋突出。对于中高含水低液面油井，近几年逐步由热油清蜡转为热水清蜡，减少了大量原油的回注，但因此带来的问题有：１．油层压力低，大量洗井水进入地层? With the development of oilfields in the middle and later stages, the comprehensive water cut in oilfields generally increases, the liquid level decreases, and the waxing characteristics of the oilfields also change. In the past, the contradictions of the anti-waxing measures under the new conditions have become increasingly prominent. For middle and high water cut low oil level wells, in recent years, hot oil waxes are gradually converted into hot water waxes, reducing the injection of large amounts of crude oil, but the problems are as follows: 1. Low pressure reservoir, a large number of well water into the formation?