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氟硼酸(HBF_4)酸化是近年来砂岩酸化技术的新发展。和盐酸(HCl)及土酸(HF+HCl)酸化比较,氟硼酸既具备较好的缓速作用,可增大酸作用距离,又可稳定泥岩,避免地层结构破坏。但氟硼酸的缺点是反应速度缓慢,近井地层不能受到较好的溶蚀,为此国外较标准的工艺程序是氟硼酸系列酸化:先注入盐酸溶解碳酸盐胶结物,再注入土酸处理井壁附近,而后注入氯化铵(NH_4Cl)隔离液,隔开土酸和氟硼酸,再注入氟硼酸深度酸化地层内部。氟硼酸系列酸化仍属解堵性作业。
Bromine acid (HBF_4) acidification is a new development of sandstone acidification technology in recent years. Compared with the acidification of hydrochloric acid (HCl) and earth acid (HF + HCl), fluoroboric acid not only has a good retarding effect, but also increases the acid action distance and stabilizes the mudstone to avoid the destruction of the stratum structure. However, the disadvantage of fluoboric acid is that the reaction speed is slow and the near-well formation can not be well dissolved. Therefore, the standard process procedure abroad is the fluoroboric acid series acidification: hydrochloric acid dissolving carbonate cement and then earth acid treatment well Wall, and then injected ammonium chloride (NH_4Cl) isolation fluid, separated from the acid and borofluoride, and then injected into the depth of fluoroboric acid acidification within the formation. Fluoroboric acid acidification is still unplug operation.