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压裂改造是低渗透油藏油井增产和提高原油采收率的重要措施。压裂效果的好坏与压裂液的性能息息相关,目前国内常用的田菁胶与改性田菁胶压裂液残渣含量较高,对地层伤害较大。本文提出一种优于田菁胶类的新型压裂液——SC-1型植物胶压裂液,它具有耐温性能好、携砂能力强、滤失低、破胶化水彻底、残渣含量低、对地层伤害小等特点,适合于地层温度为80℃~140℃的油层进行压裂改造,该压裂液已在现场应用一百余井次,取得了较好的经济效益。
Fracturing reform is an important measure to increase oil production and improve oil recovery in low permeability reservoirs. The effect of fracturing is closely related to the performance of fracturing fluid. At present, the content of sclare gum and modified segemene gel commonly used in China is relatively high, which causes more damage to the formation. In this paper, we propose a new type of fracturing fluid-SC-1 vegetable gum fracturing fluid that is better than Sesbania gum, which has the advantages of good temperature resistance, good sand carrying capacity, low filtration loss, complete destruction of gelling water, Low content and small damage to the formation. It is suitable for the fracturing of the reservoirs whose formation temperature is between 80 ℃ and 140 ℃. The fracturing fluid has been applied in the field for more than one hundred times and achieved good economic benefits.