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ＫＬ—２井是塔里木盆地克拉苏构造山前构造的一口预探井，钻探过程中，盐膏层及高压气压易出现缩径、井涌、井漏及卡钻等复杂情况，采用聚磺氯化钾钻井液体系，密度控制在 １．７５～１．８０９／ｃｍ３和２．２０～２．４０ｇ／Ｃｍ３平衡地层压力，较好地解决了钻探过程中出现的各种复杂情况。
The KL-2 well is a pre-exploratory well constructed in front of the Kelassu tectonic structure in the Tarim Basin. In the process of drilling, complex situations such as diameter reduction, well flushing, Potassium drilling fluid system, density control in the 1.75 ~ 1.809 / cm3 and 2.20 ~ 2.40g / Cm3 balance formation pressure, the better solution to the drilling process in the complex situation.