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针对高压低渗油藏增注效果逐次变差的问题,从油藏的地质特点出发,分析了影响其酸化效果的主要因素。针对这些问题,开展了冲压酸化联作增注技术的现场试验。该技术是把冲压解堵技术与酸化增注技术有机结合起来,通过物理、化学的双重作用,对欠注层进行解堵和改造,提高注水井近井底地带渗透性,达到降压增注效果的一项增注新工艺。该工艺在现场应用后,增注效果得到明显的改善,取得了较好的的经济效益,具有较好的推广应用价值。
Aiming at the problem that the re-injection effect of high pressure and low permeability reservoirs gradually deteriorates, the main factors affecting the acidification effect are analyzed from the geological characteristics of the reservoir. In response to these problems, a field test of stamped and acidified staged injection technology has been carried out. The technology is the stamping and plugging technology and acidification technology added by injection, through the dual role of physics and chemistry, the unburied and reformed the under-injection layer to improve the injection well near the bottom of the wellbore permeability to achieve buck under the note Effect of a new technology injection. After the application of the process in the field, the effect of adding injection has been obviously improved, and the better economic benefits have been achieved, which has a good popularization and application value.