非热采高含硫化氢井生物脱硫处理工艺及效果

孤岛含硫化氢井井数多，分布广，治理难度大，高含硫化氢井主要集中在蒸汽驱区块，主要采用单井井口套管投加脱硫剂治理，效果较好。随着外围油田开发，垦西油田部分区块的非热采井生产出现高含硫化氢气体，分布较广，药剂用量大，综合治理成本高。同时外围油田采出液矿化度高，常规脱硫剂配伍性差，促进结垢影响生产。非热采井无稳定的高温高压环境，其硫化氢产生原因尚不明确，无较好的针对性治理措施。该文针对孤岛外围油田区块，明确非热采井硫化氢产生机理，开展非热采井生物脱硫技术研究，现场应用取得明显效果，有效解决生产现场的安全和环境问题，具有良好的推广前景。

Biodesulfurization Process and Effect of Non-thermal Production Wells with High Hydrogen Sulfide

Large amount and wide distribution of wells containing hydrogen sulfide make it difficult to conduct sulfide treatment in Gudao. The high hydrogen sulfide wells mainly distribute in the steam flooding block. Single well wellhead casings were mainly used for the treatment of desulfurization agent and turned out it worked well. In recent years, with the development of extended oilfields, non-thermal production wells in some blocks of Kenxi Oilfield have also produced high-content hydrogen sulfide gas, which is widely distributed, using a large amount of chemicals, and causing the high cost of comprehensive treatment. At the same time, the mineralization of the produced fluid in the extended oilfields is high, and the compatibility of conventional desulfurizers is poor, which promotes scaling and affects production. Non-thermal production wells are not in a stable high temperature and high pressure environment, the cause of hydrogen sulfide generation is still unclear, and there is no good targeted treatment measures. Therefore, for the peripheral oilfield blocks of Gudao, in this paper, the mechanism of hydrogen sulfide generation in non-thermal production wells and the research on biological desulfurization technology in non-thermal production wells have been camied out, which obtained obvious application result and effectively solved the safety and environmental problems in the production site, it has good promotion prospects.