基质酸化运用于砂岩地层处理已经有很长的历史。液体通常是按照前置液、主液、后置液和转向剂重复多步泵入。然而HF酸会与地层发生不期望的反应,引起次级及三级沉淀,伤害储层。近年来国外油田和服务公司提出了一种新型单步法酸化技术,采用一种新型的膦酸络合物与螯合剂相复配的主酸,单步一次泵入,不加前置液和后置液。这种技术能有效地改善地层渗透率,减少产生次级及三次沉淀的危险性。 Substrate acidification has been used for sandstone formation treatment for a long time. Liquid is usually in accordance with the pre-liquid, the main liquid, the rear liquid and diverting agent repeated multiple pump. However, HF acid will react undesirably with the formation, causing secondary and tertiary precipitation, which will damage the reservoir. In recent years, foreign oilfields and service companies proposed a new single-step acidification technology, using a new type of phosphonic acid complex complexed with the chelating agent of the main acid, single-step pumping without precursor and After the liquid. This technique can effectively improve the formation permeability and reduce the risk of secondary and tertiary precipitation.