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Chateaurenard油田下属的Courtenay(科特尼)油田已完成工业性注聚合物。注入粘度为21cP的部分水解聚丙烯酰胺溶液,驱替粘度为40cP的原油。科特尼油田位于地下600m深的狭长地层,原始储量为130万m~3,目前仅采出44.1万m~3。由于地层压力低,水突破粘性油发生指进,导致产油量有限。从1985年～1989年进行了注聚合物的试验,整个油田的原油采收率大幅度提高。聚合物驱油的面达640000m~3,包括三个区块的4口注入井、16口采油井。自1989年7月始,以380m~3/d的速度注入浓度为1000ppm的聚合物溶液。聚丙烯酰胺溶液用油田水配制经两级稀释制成乳状液。截至1989年12月31日,注入194500m~3的1000ppm聚合物溶液,相当于30.4％的孔隙体积。结果油田产量从以前的22m~3/d增加到注聚合物后的70m~3/d,这应归因于油田压力变化,在5口采油井中观察到三次采油形成的富油带。其中一口井产出液中含有高浓度的聚合物,分析结果表明聚合物在注入和流经地层时没有被降解。预计,到2001年将产出17.9万t原油,而任其自然开采,仅能采出5.7万t,估计增产油的技术成本为11美元/bbl。
Courtenay Oilfield, Chateaurenard Field, has completed industrial injection of polymers. A partially hydrolyzed polyacrylamide solution with a viscosity of 21 cP was injected to displace the crude oil with a viscosity of 40 cP. The Courtenay oil field is located in a narrow, 600m-deep strata with an original reserve of 1.3 million m 3 and currently only 441,000 m 3. Due to the low formation pressure, sticking oil breaks through the finger, resulting in limited oil production. From 1985 to 1989, a polymer injection test was carried out. The recovery rate of crude oil in the whole field has been greatly increased. Polymer flooding reached 640000m ~ 3, including three blocks of four injection wells, 16 wells. From July 1989 to the beginning, to 380m ~ 3 / d speed into the concentration of 1000ppm polymer solution. Polyacrylamide solution with oilfield water preparation made of two diluted emulsion. As of December 31, 1989, a 1000 ppm polymer solution at 194500 m -3 was injected, corresponding to a 30.4% pore volume. As a result, oilfield production increased from 22m3 / d to 70m3 / d after polymer injection, due to the pressure changes in the oilfield. Oil-rich zones formed by tertiary oil production were observed in the five production wells. One of the wells contained a high concentration of polymer in the effluent and the analysis showed that the polymer was not degraded when injected into and through the formation. It is estimated that 179,000 t of crude oil will be produced by 2001, leaving only its natural exploitation to produce only 57,000 t. The estimated technical cost of generating additional oil is US $ 11 / bbl.