In order to achievee the expected effect of matrix acidizing in Mishrif carbonate reservoir in Rumaila Oilfield, the viscoelastic self-diverting acid ( VEDA) was determined as the main treatment fluids, and diverted the fluids with max-imum differential pressure and injection rate, taking coiled tubing and foam as auxiliary means for diversion of the fluids. Rheology evaluation and core sealing experiments have been conducted, and applied to the well Ru-315. Research results showed that the optimum concentration of the surfactant S1000 in the VEDA system was 5%~7%. The system was featured with a relatively low pumping friction, effectively sealing the high-permeability layers after forming the gel, no damage to the reservoir caused after the gel is broken. Field testing results indicated that the reservoir has been improved by acidi-zing, the increments of daily yield were 55% and 96. 9% respectively for high-permeability layers and low-permeability layers, i. e. the improvement degree of the later is better than that of the former, by which the desired acidizing effect has been obtained.%为了使鲁迈拉油田Mishrif碳酸盐岩储层基质酸化达到预期效果，确定了以VEDA (黏弹性自转向酸液体系)为主，以MAPDIR (最大压差及注入速率)转向、连续油管转向及泡沫转向为辅的联合转向方式。进行了VEDA自转向酸液体系流变性评价及岩心封堵实验，并在Ru-315井进行了现场试验。研究结果表明， VEDA酸液体系中表面活性剂S1000的最佳浓度为5%~7%；该体系具有较低的泵注摩阻，冻胶形成后能够有效封堵高渗透层，破胶之后不会对储层渗透率造成伤害。现场试验结果表明，酸化后高、低渗透储层均得到了不同程度的改善，日产量分别增加55%和96.9%。低渗透储层的改善程度好于高渗透储层，酸化达到了预期效果。
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