The pilot test of MF microbe oil displacement

2+3 of the upper second section of Shahejie Reservoir is a high permeable reservoir, as the water injection had developed for so long a time, and the clay's heterogeneity was strengthened and water flooding was quick, the layer's intraformational contradiction was aggravating. Analyzed the problems of oil displacement technologies in the past years, we found the ordinary technologies such as polymer flooding, surface-active agent flooding, alkaline flooding, and compound flooding weren't adaptable to the reservoir and couldn't increase the displacement ability. MF microbe is a new oil displacement agent. The new technology combined the study results of organism polymer and EPS can increase oil recovery ratio. Tests in lab indicated clearly that the MF microbes can live very well in injection water and better restrain sulfate reducing bacteria. In 2006, we carried out the pilot test in two well groups in 2+3 of the upper second section of Shahejie Reservoir and got good result, the oil production of correspondent 8 oil wells have increased by 2 448 tons. The application prospect of MF microbe oil displacement is broad.