克拉玛依油田七中区内源微生物驱矿场试验生化指标跟踪与评价

Biochemical Indexes Tracking and Evaluation of Indigenous Microorganism Flooding Field Test in Mid-7 District of Karamay Oilfield

李明 王红波 钱玉祥 连泽特 代学成

LI Ming WANG Hongbo QIAN Yuxiang LIAN Zete DAI Xuecheng

为揭示油井产出液中各项生化指标的变化规律与增产效果之间的关系，在克拉玛依油田七中区克上组砾岩油藏4 口注入井和11 口采油井开展了内源微生物驱矿场试验，对试验井各项生化指标进行了跟踪监测，包括油井产出液中总活菌数、烃氧化菌（HOB）数，硫酸盐还原菌（SRB）数、营养物质（总糖、总氮）、乙酸根离子浓度、水质及水相表面张力等。现场跟踪监测结果表明，实施微生物驱措施后，试验井内源微生物总活菌数可提高1～2 个数量级，有益菌HOB数可提高2 个数量级，SRB得到抑制，总活菌数和HOB菌数越高增产效果越明显；内源微生物在好氧环境中被大量激活，产生乙酸根离子，每口井的乙酸根离子浓度平均可达8.0 mg/L左右；对激活剂的利用率较高，总糖、总氮含量小于注入营养剂含糖量和含氮量的10%，监测期间的变化较小，与增产效果的关系不明显；水相表面张力、水质矿化度及pH值变化较小，对增产效果的影响较小。表7参14

In order to reveal the relationship between the changes of biochemical indexes in produced fluid and the effect of increasing production in oil well，indigenous microbial flooding field test was carried out in four injection wells and 11 production wells of Keshang conglomerate reservoir in mid-7 district of Karamay oilfield. Biochemical index of the test wells，including total viable count in produced fluid，hydrocarbon-oxidizing bacteria（HOB）number，sulfate-reducing bacteria（SRB）number，nutrients （total sugar and total nitrogen），acetate ion concentration，water quality and aqueous phase surface tension，etc，were tracked and monitored. The results of test showed that indigenous microbes could increase the total number of bacteria with 1—2 orders of magnitude and the number of HOB with 2 orders of magnitude. The SRB was inhibited. The higher the number of live bacteria and HOB，the more obvious effect was. The average concentration of acetate ion per well increased to 8.0 mg/L after microbial flooding measures. The total sugar and total nitrogen content were less than 10% of that with injected nutrient，and the change of monitoring period was not obvious. It would be a higher utilization rate on the condition of activator nutrients injected into the reservoir. While the change of aqueous phase surface tension，water salinity and pH value was little，which had little impact on the effect of increasing production.

10.19346/j.cnki.1000-4092.2017.02.026