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在阿拉伯，经过一次采油和注水开发期以后，大量的残余油留在油层中。由于沙特油田面积很广，残余油的总量也相当丰富。据最新公布的数字，沙特阿拉伯的地下原油大约有7000×108bbl。只有2500×108bbl左右（占总量的35％）可用常规方法采出。如果用强化采油方法采出其余4500×108bbl油中的仅20％的话，沙特阿拉伯的探明储量就将增加900×108bbl以上──这相当于美国和加拿大探明储量总和的两倍。任何能够有效采出残余油的方法都具有重要意义，应予以调查研究。微生物提高石油采收率（MEOR）已被看作是一个行之有效的方法。
In Arabia, after a period of oil and water injection development, large amounts of residual oil remain in the oil layer. Due to the wide area of Saudi oil fields, the total amount of residual oil is also quite abundant. According to the latest figures, Saudi Arabia’s underground crude oil has about 7000 × 108bbl. Only about 2500 × 108bbl (35% of the total) can be produced by conventional methods. If only 20% of the remaining 4500 × 108bbl of oil is recovered by enhanced oil recovery, Saudi Arabia’s proven reserves will increase by more than 900 × 108bbl - equivalent to twice the total proven reserves of the United States and Canada. Any method that can effectively recover residual oil is of great significance and should be investigated. Microbial enhanced oil recovery (MEOR) has been seen as an effective method.