油田采出水外排处理厂碳排放核算方法及碳减排路径研究

Research on carbon emission accounting method and carbon emission reduction path of oilfield extractive water discharge treatment plant

以稠油及超稠油采出水外排处理厂为研究对象,污水处理工艺为调节除油罐—斜板除油罐—两级溶气气浮装置—核桃壳过滤器—冷却塔—两级AS-PACT工艺—二沉池—石英砂过滤器。首先,组合形成了完整的稠油及超稠油采出水外排处理碳排放核算方法,对碳排放活动进行核算,外排厂碳排放强度为3.78 kgCO_(2)eq/m^(3),其中间接碳排放占比87.20%,厘清采出水处理全工艺过程中碳排放的关键点。其次,对物耗、热耗、电耗产生的间接碳排放强度进行核算分析,探究了外排处理厂节能降碳路径。

The research focuses on the water discharge treatment plant for heavy and ultrathick oil recovery.The wastewater treatment process includes conditioning de-oil tank,inclined plate de-oil tank,two-stage dissolved air flotation device,walnut shell filter,cooling tower,two-stage AS-PACT process,dual sedimentation tank,and quartz sand filter.A method for accounting carbon emissions from heavy oil and super heavy oil produced water has been developed.The carbon emission intensity of the external discharge plant is 3.78kgCO_(2)eq/m^(3),with indirect carbon emissions accounting for 87.20%.This clarifies the key points of carbon emissions in the entire process of produced water treatment.Secondly,the study analyzes the indirect carbon emission intensity resulting from material,heat,and electricity consumption.It explores the energy-saving and carbon reduction path of the effluent treatment plant.