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室内实验利用带静切力的幂律方程(H-B方程)的评价实验方法,考察了SMT分散剂、铁铬木质素磺酸盐分散剂及矿渣对钻井液性能的影响规律以及对钻井液泥饼固化性能评价。结果表明,分散剂SMT对调节钻井液的流变性能具有一定效果,加入6%矿渣+0.8%SMT的改性钻井液同原浆接近,经过高温高压滤失后形成的滤饼放入水泥原浆滤液中养护15天后,可形成具有一定强度的固化体。改性后的钻井液可以作为一种特殊的钻井液体系达到钻井及提高固井第二界面胶结质量的目的,具有较好的应用前景。
In laboratory experiments, the influences of SMT dispersant, iron chromium lignosulfonate dispersant and slag on the performance of drilling fluid were investigated with the evaluation method of power-law equation with static force (HB equation) Curing performance evaluation. The results show that the dispersant SMT has certain effect on the rheological performance of drilling fluid. The modified drilling fluid with 6% slag + 0.8% SMT is close to the puree, and the filter cake formed after filtration under high temperature and high pressure is put into the cement The filtrate after curing in 15 days, can form a certain strength of the cured body. The modified drilling fluid can be used as a special drilling fluid system to reach the purpose of drilling and improving the cementing quality of the second interface of cementing, and has a good application prospect.