Preparation and Laboratory Evaluation of a New Type of Cross-Linking Agent for Acid Fracturing Fluid System
A type of zirconium-organic cross-linking agent with excellent temperature resistance and delaying performance was prepared for acid fracturing fluid system. The factors influencing on the synthetic process of the zirconium-organic cross-linking agent were investigated and the optimum condition was obtained: 5% zirconium oxychloride, 20% ligands, reaction temperature 50~55°C, reaction time 4.0~5.0h. Then the best technology for zirconium-organic cross-linking agent and the laboratory evaluation for the acid fracturing fluid system were studied. The results showed that using the cross-linking agent can obviously improve the temperature resistance, delaying performance and the shearing resistance of the acid fracturing fluid system. Meanwhile, the zirconium-organic cross-linking agent had excellent gelout performance and sand-carrying performance, which can satisfy the fracturing operation requirement for the reservoirs below 100°C.
Weiguo Pan, Jianxing Ren and Yongguang Li
X. B. Wei et al., "Preparation and Laboratory Evaluation of a New Type of Cross-Linking Agent for Acid Fracturing Fluid System", Advanced Materials Research, Vols. 347-353, pp. 995-1000, 2012