Amine polyether,also known as polyether amine,has a good ability to inhibit shale dispersion,and it is not easy to cause clay flocculation,is currently used in drilling site one of the polyamine inhibitors.The effects of monoamine polyether with molecular weight between 200 and 2 000 and mixed amine polyether with molecular weight about 800 on the inhibition ability of drilling fluid to shale were investigated by acid titration.The results show that the smaller the molecular weight and the narrower the molecular weight distribution,the stronger the inhibition ability of amine polyether.The total amine value≥3 mmol/g of amine polyether has the ability of long-term inhibition of bentonite dispersion.
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