利用累计耗氧量方法试验评价了海洋油田水平井钻井液体系和处理剂的生物降解性。试验结果表明,无固相弱凝胶钻井液体系各处理剂具有很好的生物可降解性,其中改性淀粉类降滤失剂FLO生物降解速率最快,其次为增粘剂VIS和聚合醇防塌润滑剂JLX。无固相弱凝胶水基钻井液体系也具有较好的生物可降解性,是一种环境友好的水平井钻井液。 The biodegradability of horizontal well drilling fluid system and treatment agent was evaluated by cumulative oxygen consumption test. The experimental results show that the treatment of non-solid weak gel drilling fluid system has good biodegradability, of which the modified starch-based fluid loss agent FLO biodegradation rate fastest, followed by viscosifier VIS and polymeric alcohol Anti-collapse lubricant JLX. Solid-free weak gel water-based drilling fluid system also has good biodegradability, is an environmentally friendly horizontal well drilling fluid.