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对于多层状和大厚层油气藏的酸化，由于储层纵向上的非均质性或污染程度的差异，必须考虑酸液的分流。采用笼统酸化显然不易达到改善出油气剖面或吸液剖面的目的；采用分层酸化则费时、费力，且往往难以奏效。文中介绍的暂堵酸化技术可以有效地解决大厚层纵向非均匀堵塞和多层油藏各层不同堵塞程度的酸化解堵问题，对于恢复和改善油气井纵向出油气剖面或水井纵向吸液剖面具有其独特的作用。给出了该技术的原理、完整的数学模拟计算方法、优化施工参数以及现场操作实施方案；并且研制了暂堵酸化设计软件；研制并开发出了分别用于油、气、水井的新型暂堵剂。该工艺有效、简单易行，可以在现场迅速投入运用；已取得了良好的经济效益，文中给出了现场应用实例。

TEMPORARY PLUGGING ACIDIZING TECHNIQUE AND ITS APPLICATION

??As regards the acidizing in a multizone and large thickness oil&gas reservoir, owing the vertical difference in reservoir heterogeneity or pollution degree, the fractional flow of acidizing fluid must be considered.Because the purpose of improving oil-and gas-producing or fluid entry profile is not easy to be attained obviously by adopting long interval acidizing and it takes both time and effort and is always difficult to be successful to adopt separate zone acidizing, the temporary plugging acidizing technique introduced in the paper may effectively solve the problems of the plug removal by acidizing for the vertical non uniform plugging in a massive reservoir and for the various plugging degrees in a multilayered reservoir, which has a unique effect on resuming and improving the vertical oil-and gas-producing profile in an oil&gas well or the vertical fluid entry profile in a water well.In the paper, the principle, complete calculation method of mathematic simulation, optimum operation parameters and on-the-sopt operating plan of such a technique are given out and the temporary plugging acidizing design software and the new-type temporary plugging agent used for oil, gas and water wells respectively are developed.This technique is effective, simple and easy to be operated, being able to be quickly put into application in the field and a good economic result having been obtained.An example of applying the technique in the field is also given out in this article.