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针对高温、高密度油包水逆乳化钻井液降滤失量大的问题而研制出一种新型抗高温油基钻井液降滤失剂。这种降滤失剂采用胺化合物对腐植酸进行改性 ,得到一种亲油性的腐植酸衍生物 ,所得的腐植酸衍生物经进一步热裂解处理后 ,得到抗温能力达 2 2 0℃、运用于超高密度 2 .38g/cm3 的油基钻井液降滤失剂XNTROL 2 2 0。此降滤失剂在油中具有良好的分散能力 ,在油包水逆乳化泥浆中具有明显的降滤失效果 ,同时具有稀释降粘、辅助乳化等功能
Aimed at the problem of large fluid loss due to high temperature and high density water in oil reverse emulsion drilling fluid, a new type of high temperature oil-based fluid loss control fluid was developed. This filtrate reducer adopts amine compound to modify humic acid to obtain a lipophilic humic acid derivative. The obtained humic acid derivative is further pyrolyzed to obtain a temperature-resistant ability of up to 220 DEG C, Used in ultra-high density 2.38g / cm3 oil-based drilling fluid filtrate reducer XNTROL20. The fluid loss additive has good dispersing ability in oil, has obvious effect of reducing fluid loss in the water-in-oil reverse emulsion slurry, and has the functions of dilution and viscosity reduction, auxiliary emulsification and the like