安棚低渗裂缝性储层高温压裂液研究与应用

分析了安棚低孔、低渗裂缝性储层对压裂液的基本要求，确定了评价压裂液性能的实验温度，优化了稠化剂、胶联剂、破胶剂、助排剂等添加剂，形成了适宜于安棚油田的压裂液体系，该压裂液具有良好的耐温、耐剪切和延迟交联特性，携砂能力强、破胶彻底、伤害低，能够满足90～140℃温度地层压裂施工的需要。提出了变浓度压裂液优化设计技术，现场实施49井次，成功率91.3％，有效解决了高温裂缝性储层压裂易砂堵的难题。

Research and Application of High Temperature Fracturing Fluid for Poor Permeability Fracture Reservoir in Anpeng Oilfield

In order to meet the demand of the fracturing fluid used in Anpeng Oilfield which is low porosity, poor permeability, high temperature and plentiful fracture reservoir, experiment temperature for assessing fracturing fluid has been determined. Thickener, gellant, viscosity breaker and cleanup additive have been selected optimally. The fracturing fluid system has been formulated which is suitable for the zones of Anpeng Oilfield. The fracturing fluid has the advantages of high temperature resistance, shear resistance, delayed crosslinking, excellent prop-carrying capacity, complete viscosity breaking and low damage. The fracturing fluid can be used in the zones whose temperature is between 90℃ and 140℃. The fracturing fluid has been used in 49 wells for fracturing operation. Success ratio is 91.3%. The problem of sand plugging for high temperature fracture reservoir has been solved.