稠油微生物开采矿场试验研究——以克拉玛依油田为例

为了增加开发效益及进一步提高原油采收率,克拉玛依油田优选了混源采油菌组合,采用单井吞吐的生产方式,分两批对21口稠油开发井进行了微生物开采矿场试验。经采油菌作用,作业区的稠油粘度大幅度降低,在停止注蒸汽的情况下,大多数试验井都能达到经济产能,试验得到了较高的投资回报率。结果表明,所选用的采油菌组合对胶质、沥青质含量高的稠油作用效果显著,矿场试验的投资少、见效快、收益高。稠油微生物开采技术值得在克拉玛依油田的稠油开发中加以应用、推广。

Field experimental study of microbial enhanced heavy oil recovery: taking Kelamayi oilfield as an example

In order to improve the economic benefits of oilfield development and further enhance oil recovery factor, mixed bacterial combinations were selected and field experiments of microbial enhanced heavy oil recovery were performed in 21 heavy oil wells in Kelamayi oilfield through single well huff and puff. The injected bacteria greatly lowered the viscosity of heavy oil and the deliver-ability of most experiment wells reached the economic level without steam injection. The return on investment of the experiments was relatively high. Experiment results show that the selected bacteria combinations can effectively act on heavy oil with high contents of colloid and as-phaltenes. The field experiments need a small amount of investment, can produce the desired results rapidly, and achieve high economic benefits. Therefore, microbial enhanced heavy oil recovery is worth of application and dissemination in Kelamayi heavy oilfield.