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四川碳酸盐气藏深井酸化,长期停留于解堵酸化水平,重要原因之一是普通酸经直径较小的2(1/2)″油管酸化深井,施工水马力大部分消耗于克服管路摩阻,实际作用在产层的压力不大,因而酸化深度小,增产效果不理想。同时大批老井,采用小酸量、小排量酸化或重复酸化,往往收效不大,由于种种原因(如套管强度低等),又不能承受大排量施工高压,故甚难加以改造。显然,大幅度降低酸
One of the important reasons for the long-term acidification of carbonate reservoirs in Sichuan is that they are acidified by 2 (1/2) "tubing of smaller diameter. Most of the construction water is consumed in overcoming the pipeline Friction resistance, the actual role of pressure in the pay zone is not large, so the acidification depth is small, the yield is not ideal.At the same time a large number of old wells, the use of small amount of acid, small displacement acidification or repeated acidification, often ineffective, due to various reasons Such as low-strength casing), but also can not withstand high-pressure construction of large displacement, it is difficult to be transformed.Obviously, significantly reduce the acid