常用钻井液填加剂对钻井污水化学需氧量的影响

针对石油工业钻井污水化学需氧量（ＣＯＤ）严重超标的状况，从分析测定目前油田常用的８种钻井液添加剂的ＣＯＤ入手，探讨了钻井液添加剂对钻井污水的影响。实验结果表明：８种钻井液添加剂按油田现场配比复配后，对钻井污水ＣＯＤ的影响程度各不相同，其大小依次为：柴油、ＨＰＡＮ、磺化沥青、ＰＡＮ、ＰＡＭ－１、ＦＡ－３６７、ＸＹ－２７、ＣＭＣ；钻井污水中ＣＯＤ值严重超标的主要因素是钻井液添加剂；并且钻井液添加剂浓度与其对应的ＣＯＤ之间存在良好的一元线性关系。根据一元线性回归方程可较好地预测油田现场各钻井液添加剂对ＣＯＤ的影响，为解决钻井污水处理这一难题提供科学依据。

Influence of common drilling fluid additives upon sewage COD

Aiming at the condition of heavily over standard COD (Chemical Oxygen Demand) in drilling sewage of petroleum industry,authors started from analyzing and determining 8 kinds of drilling fluid additives commonly used in fields and discussed afterwards the influence of additives upon drilling sewage.The testing results indicated that different combinations of field site prepared proportions of 8 kinds of drilling fluid additives had different influences upon the COD in drilling sewage,of which ranging from the largest to smallest were diesel,HPAN,sulfonated bitumen,PAN,PAM-1,FA-367,XY-27 and CMC.The main reason for heavy over standard COD in sewage was drilling fluid additives and there existed smooth one-dimensional linear relationship between the concemtration of a kind of additive and its responding COD.The influences of different field site additives upon COD in the sewage may be predicted fairly by one-dimensional linear regression equation,which provided scientific proof to solve the difficult problem of processing drilling sewage.