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采用精细地质研究、油藏综合动态分析、数值模拟和经济评价等技术,解决宋芳屯油田葡萄花油层高含水油井的压裂挖潜问题. 结果表明:高含水油井存在相当数量有待解放产能的非主力层. 当全井含水为40 % ~80 % 时,非主力层处于注水受效旺盛期,适宜压裂. 压裂层选取标准为厚度大于1 .5 m 、地层压力大于8 .0 M Pa 、有效渗透率为20 ×10 - 3~60 ×10 - 3 μm 2 、水淹层( 或高含水层) 与压裂层( 未水淹) 有效渗透率比值为1 .5 ~5 .0 . 高含水油井采用压裂技术开发后,4 口压裂井平均单井日增油2 .9 td ,预计全年增油量可达3 084 t .
Using fine geology research, integrated reservoir dynamic analysis, numerical simulation and economic evaluation techniques, the fracturing and tapping potential of the Putaohua oil-bearing high water cut oil well in Songfangtun Oilfield is solved. The results show that there exists a considerable amount of non-main layers to be released for production in high-water-cut oil wells. When the whole well water content is 40% -80%, the non-main layer is in a period of strong water injection and is suitable for fracturing. Fracturing layer selection criteria for the thickness greater than 1. 5 m, formation pressure greater than 8. 0 M Pa, and the effective permeability is 20 × 10 -3 ~ 60 × 10 -3 μm 2. The effective permeability ratio of water flooded layer (or high aquifer) to fractured layer (not flooded) is 1. 5 ~ 5. 0. After the development of fracturing technology for high water cut oil wells, the average pressure of 4 fracturing wells increased by 2%. 9 td. It is estimated that the annual oil increase will reach 3 084 t.