在油气井的酸化施工中,酸液进入地层之前,要与施工设备和井下管串接触,在其中引入铁离子是难以避免的。酸液进入地层后,与储层反应而酸度降低,溶解在酸液中的铁就可能再沉淀出来,堵塞孔道,降低酸化效果。在残酸排出地面后,人们常常在其 Acidification in the oil and gas wells in the construction, the acid into the formation before, with the construction equipment and downhole string contact, in which the introduction of iron ions is difficult to avoid. Acid into the formation, the reservoir reaction and the acidity decreases, the acid dissolved in the iron may be re-precipitation out, blocking the channel, reducing the acidification effect. After the acid excreted from the ground, people often in it