在厚的、高渗透砂岩地层下套管完井中 ,防砂井裸眼砾石充填完井提供了较高的生产能力和合理的成本费用。但钻井中形成的滤饼被砾石捕获 ,引起井筒内高压差流体非均质流入井底和较低的生产率。为彻底实现裸眼完井高效生产的优点 ,有效地清除和返排这些滤饼是十分必要的。为研究防砂完井中滤饼的返排工艺 ,我们做了2 0余种系列综合实验 ,各种研究包括泥浆重量和类型、砾石尺寸、各种酶和酸等添加剂、砾石分选、滤砂器类型等。全文总结了实验中的 12种实验结果 In casing and completion under thick, highly permeable sandstone formations, open-hole gravel packings of sand control wells provide higher productivity and reasonable cost. However, the filter cake formed in the wellbore is captured by the gravel, causing a heterogeneous inflow of high differential pressure fluids into the wellbore and lower productivity. In order to fully realize the advantages of efficient and open-hole completion, it is necessary to effectively remove and return the filter cake. In order to study the backfilling process of the filter cake in the sand control well completion, we have done more than 20 series of comprehensive experiments. Various researches include mud weight and type, gravel size, various enzymes and acid additives, gravel sorting, sand filter Type and so on. The full text summarizes the 12 experimental results in the experiment