小阳离子聚合物黏土稳定剂HWJ的合成及应用

The Synthesis and Application of a Low Molecular Weight Cationic Polymer Clay Stabilizer HWJ

以环氧氯丙烷、二甲胺为反应单体,过硫酸钾-亚硫酸钠为引发剂合成了小阳离子聚合物黏土稳定剂HWJ,并对HWJ的防膨性能和小阳离子聚合物钻井液进行了研究。结果表明,HWJ黏土稳定剂具有很强的抑制黏土水化膨胀能力。加入该稳定剂的钻井液具有很好的抗温性、抑制性和抗污染能力,保护油气层效果明显,渗透率恢复值均达到85%以上,能满足钻井工程的要求。

A low molecular weight cationic polymer clay stabilizer,HWJ,was synthesized using epoxy chloropropane and dimethyl amine as reactants,and potassium persulfate and sodium sulfite as reaction initiators.Laboratory experiments were conducted on the inhibitive capacity of HWJ and the performance of the drilling fluid treated with HWJ.It is shown that the addition of HWJ in the drilling fluid improves the temperature stability,inhibitive capacity and contamination tolerance of the drilling fluid.Core samples flushed with the said drilling fluid have permeability recovery of greater than 85%.