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英科1井是1口井深6406m，含有多层高压盐水层，地层压力高达140～150MPa的超高压科学探索井。该井位于塔里木盆地西南部的英吉沙背斜构造上，地层条件相当复杂，属于山前构造带，也应力异常，用常规地层压力预测方法预测的精度低。本文就地应力异常对地层压力预测的影响进行了修正，运用修正的dc指数法提高了英科1井地层压力预测的精度。同时，通过对PDC钻头钻速模式的试验研究，证明PDC钻头的资料可以用来进行地层压力预测。根据预测结果，及时、合理地调整钻井液密度，比较顺利地钻过了近百层高压盐水层和膏泥岩地层，减少了井下复杂情况和事故的发生。在该构造上第一次成功地完成了1口超高压深井。
British Division 1 well is a deep well 6406m, containing multi-layer high-pressure brine layer, the formation pressure up to 140 ~ 150MPa EHV scientific exploration well. The well is located in the Yingjisha anticline structure in the southwestern Tarim Basin. The formation conditions are quite complex and belong to the piedmont tectonic belt. There are also stress anomalies. The accuracy of prediction by the conventional formation pressure prediction method is low. In this paper, the influence of in-situ stress anomalies on formation pressure prediction is corrected. The corrected dc index method is used to improve the accuracy of formation pressure prediction. At the same time, through the experimental study of PDC bit penetration rate mode, it is proved that the PDC bit information can be used to predict formation pressure. According to the prediction results, the density of drilling fluid can be timely and reasonably adjusted, and nearly 100 layers of high-pressure brine and gypsum rock formations have been drilled smoothly, thus reducing the complicated situations and accidents in the well. For the first time in the structure, one ultrahigh pressure deep well was successfully completed.