废弃油基钻井液破乳剂的研制及应用

Development and Application of Demulsifier in Waste Oil-Based Drilling Fluid

马雅雅 王中华 何焕杰 张鑫 单海霞

MAYaya，WANG Zhonghua，HE Huanjie，ZHANG Xin，SHAN Haixia

化学破乳法是处理废弃油基钻井液比较理想的方法，但需要专用破乳剂，因此限制了其在现场的推广应用。为此，本文以某气田角51 井废弃油基钻井液为研究对象，采用“破乳-絮凝-分离”的处理工艺，研制了一种废弃油基钻井液专用破乳剂ZYFYP，该破乳剂由AE8051、BP-169、AP-05 和OP-10 组成。当AE8051、BP-169、AP-05、OP-10 质量比为3:2:1:3 且加量为0.8%、絮凝剂PAM加量为0.2%、表面活性剂OT-75 加量为1.2%，助洗剂Na5P3O10加量为10%、废弃油基钻井液温度为15℃率50℃时，在转速3500 r/min 下离心分离5 min 后，油回收率为98.6%。ZYFYP适合不同密度废弃油基钻井液油的回收处理，处理过程不需要加热，对设备要求不高，成本较低，对不同密度废弃油基钻井液油回收率大于96%。

Chemical demulsification method is effective for treating waste oil base drilling fluid，but the lack of special demulsifier has limited its application in the field. In this paper，a special waste oil-based drilling fluid demulsifier，named as ZYFYP，which consistd of AE8051，BP-169，AP-05 and OP-10，had been developed. The effect of ZYFYP in treating waste oil-based drilling fluid of Jiao-51 Well was remarkable during demulsification-flocculation-separation treatment process. Under the condition of ZYFYP amount of 0.8%（mass ratio of AE8051，BP-169，AP-05，OP-10 of 3:2:1:3），flocculant agent PAM amount of 0.2%，surfactant OT-15 amount of 1.2%，dispersant Na5P3O10 amount of 10%，the oil recovery rate was 98.6% after centrifuge separation for 5 minitues at the speed of 3500 r/min and at the temperature of 15—50℃. ZYFYP was suitable for treating different density waste oil-based drilling fluid in solid-liquid separation process. Heating process was not needed，equipment requirement was not high and the cost was low，the oil recovery rate from waste oil-based drilling fluid was greater than 96%.