The application of microbial combination flooding oil recovery technology in heavy oil reservoir with low temperature

Abstract

HuabeiBaolige Oilfield belongs to the common heavy oil reservoirs with low temperature, which were tapped by the conventional waterflooding. The formation temperature of Baolige Oilfield is 38∼58°C, and the oil viscosity of reservoir is 13.7∼2000mPa•s. Thanks to the high oil-water viscosity ratio and strong heterogeneity, the small waterflooding swept volume and serious water breakthrough are caused by waterflooding fingering, causing that the workable reserve cannot be used efficiently during the oilfield development. According to the characteristic that the environment of the reservoirs is fit for the growth and reproduction of microorganism, the microbial enhanced oil recovery (MEOR) technology is used to improve oilfield development status. On the basis of continuous and further studies of MEOR, the industrialized application of MEOR has been fulfilled. By the continuous and further study, the efficient system of the combination flooding technology with oil displacement microbial fields was formed, and MEOR technologies have been enriched. All the above researches could provide technical ideas for the comprehensive treatment for similar blocks.