Preparation and performance evaluation of polyvinyl alcohol grafted polyacrylic acid for plugging

Well-leakage is a very difficult problem in the process of drilling at home and abroad. At present, it mainly relies on cumulative effect plugging slurry to implement regardless number times costs. Commonly used technology are guarantee success rate scientific malignant leakage, which has an extremely bad impact development petroleum industry. In this study, With polyvinyl alcohol acrylic acid as main agents, material grafted was prepared, influence composition reaction system gel state studied. Through series singlefactor experiments, best formula for preparing determined, (specific gravity 1:3) + crosslinking agent (0.1wt%) initiator (0.3wt%). The using above prepare good strength suitable time, application prospect solving lost circulation.