一种新型水溶性聚合物压裂液的研制与应用

Development and Application of a New Type of Water-soluble Polymer Fracturing Fluid

水基压裂液是油田压裂增产的主力体系,其增稠剂瓜尔胶的价格近5年呈倍增趋势,严重影响了油田压裂生产。本文通过对新型水溶性聚合物压裂液的研制,形成了具有增稠剂用量小、冻胶弹性好、残渣含量低、易破胶等优点的聚合物压裂液,在大庆油田多个区块进行了现场试验,工艺成功率100%,压后效果优于同区块对比井,成本低于常规水基压裂液。在瓜尔胶价格高于3.3万元/t的情况下,水溶性聚合物压裂液可部分替代常规压裂液。

Water-based fracturing fluid is the main system of fracturing stimulation in oilfield.The price of the thickener guar gum shows a doubling trend in nearly 5years,which has seriously affected the fracturing production.In the development,a new type of water-soluble polymer fracturing fluid is formed with the advantages of small amount of thickener dosage,good gel elasticity,low residue content,and easy to break glue.It has been applied in multiple blocks in Daqing Oilfield with processing success rate 100%.The fracturing effect is better than the contrast wells in same block,and the cost lower than the conventional water-based fracturing fluid.If the guar gum price is higher than RMB 33000/ton,the water-soluble polymer fracturing fluid can partially replace the conventional.