孤东油田七区西南二元复合驱油先导试验效果及动态特点

Results and dynamic characteristics of pilot test of surfactant/polymer binary combination flooding in western No. 7 district in Gudong Oilfield

由于聚合物驱提高采收率幅度有限,于2003年9月在孤东油田七区西南Ng54～61层开展了聚合物/活性剂二元复合驱油先导试验。根据现场动态资料分析认为,二元复合驱技术在矿场上既表现出了聚合物增加渗流阻力、扩大波及体积的特点,又表现出了活性剂提高驱油效率的特点,降水增油幅度高于单一聚合物驱。截至2006年12月底,试验区已有11口生产井见到降水增油效果,全区累积增产原油84194t,采收率提高了3.04%。

Since the polymer flooding can only improve the oil recovery to a limited extent, the first pilot test of surfactant/polymer flooding was carried out in southwest Ng54- 61 of No. 7 district in Gudong Oilfield of Shengli petroliferous province in September 2003. Analysis of field dynamic data indicates that the binary combination flooding exhibits the characteristics of both the polymer flooding (increasing the flow resistance and sweep efficiency) and the surfactant flooding (improving the displacement efficiency). The amount of water decreasing and oil increasing by the binary combination is higher than that by single polymer flooding. By the end of December 2006, water decreasing and oil increasing has been observed in eleven production wells in the pilot area,cumulative oil increment in whole district is 8.4×104t, the oil recovery is improved by 3. 04%. Therefore, the binary combination flooding is a chemical flooding method suitable for popularization in Shengli petroliferous province.