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冲洗液YJC-1主要由有机溶剂、表面活性剂和螯合剂组成,具有对油包水钻井液强力渗透、增溶、乳化和螯合的复合效果,能在短时间内迅速有效地将附着在井壁、套管壁上的油浆、油膜洗净,冲洗率达100％,使井壁和套管壁从“油湿”变成“水湿”状态,有利于水泥石的界面胶结,即冲洗后界面胶结强度有所增加。通过应用螯合剂,很好地解决了冲洗液与油包水钻井液的相容性问题,提高了冲洗液的耐温性能(耐温高达200 ℃)。现场应用了4口井,固井质量优质,表明冲洗液YJC-1提高了油包水钻井液完钻井的固井质量。
The irrigating solution YJC-1 mainly consists of organic solvent, surfactant and chelating agent, has the compound effect of penetrating, solubilizing, emulsifying and chelating with water-in-oil drilling fluid, and can quickly and effectively attach to Oil well on the wall of the casing wall and oil film are washed and the flushing rate is up to 100%, which makes the wall of the well wall and the casing tube change from “oil wet” to “water wet” state, which is favorable for cementation of the cement stone, that is After washing interface bonding strength has increased. Through the application of chelating agent, the problem of compatibility between the rinsing liquid and the water-in-oil drilling fluid is well solved, and the temperature resistance of the rinsing liquid is improved (the temperature is up to 200 DEG C). Four wells were used in the field, and the cementing quality was good, indicating that the flushing fluid YJC-1 improved the cementing quality of oil-in-water drilling drills.