RESEARCH ON THE APPLICATION OF TURNAROUND FRACTURING TECHNOLOGY IN INJECTION-PRODUCTION CORRESPONDING WELLS
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摘要: 曙光油田低渗油藏存在老井低产与注压高注不进的双重难题，需要实施重复压裂提高产能。但常规重复压裂存在改造效果差和快速水窜风险，因而选择在注采对应井开展转向压裂矿场实验研究。通过注采对应井转向压裂方案研究、转向剂筛选及现场实施，取得了良好的增产增注效果。此次实验研究中，注采井均实施转向压裂，拓宽了转向压裂的思路，扩大了转向压裂的应用范围，进一步验证了转向压裂对老井挖潜增产、提高低渗油气田采收率具有重要的意义。Abstract: In order to solve the difficulty of the low permeability reservoir's low production of old wells and poor flood effectiveness in Shuguang mine area of Liaohe Oilfield, an injection-production corresponding wells of turnaround fracturing technology research is carried out. Through turnaround Mechanism, fracturing project of injection-production corresponding wells research, diverting agent selection and field conduct, it gets good effect on increasing production and injection. During this application research, turnaround fracturing technology is used for injection and production wells and widening the range of the turnaround fracturing, makes further proving turnaround fracturing has important significance to tap production and energization, and to improve the recovery of the low permeability reservoir.
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图 1 转向压裂地层机理示意图
Figure 1. Sketch map of mechanism on the formation of deflection fracturing
图 5 测量转向剂突破压力试验装置
Figure 5. Leakage test-device for measurement of breakthrough pressure of diverting agent
表 1 align="right"H-3转向剂封堵率
Table 1. Plugging ratio of Diverting Agent LH-3
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