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本文通过分析深层水平井徐深23-平1井地质特点及施工难点,针对该井钻井液携岩能力要求高、润滑性要求高、抗温性要求高、易发生井漏等技术难题,尤其是水平段易发生严重漏失的难题,室内优选了新型抗高温降滤失剂及稳定剂,进一步改善了体系的高温流变性;优选了抗高温乳化石蜡与渣油复配替代原体系中的白油,大幅提高了体系的润滑防卡能力,确保了深井长期施工的安全,同时进一步降低了润滑材料用量,降低了钻井液成本。该井突破水平井水基钻井液施工5000米井深大关,并创造了目前完钻井深最深5048m、水平段最长972m、垂深最深3933.6m三项新纪录。该井的顺利施工,对这一类井具有指导意义,有较好的应用前景。
In this paper, by analyzing the geological features and construction difficulties of the deep horizontal well Xuanshen 23- Ping 1 well, in view of the technical problems of high drilling fluid carrying capacity, high lubricity, high temperature resistance and easy leakage, Is a serious problem of horizontal section prone to serious loss, the indoor optimization of a new anti-high temperature fluid loss and stabilizer, to further improve the high-temperature rheological system; preferred high temperature emulsified paraffin and residue replacement system of white Oil, a substantial increase in the system of anti-card lubrication capacity to ensure long-term deep-well construction safety, while further reducing the amount of lubricating materials, reducing drilling fluid costs. The well broke through horizontal well 5000 meters well depth of water-based drilling fluid, and created the current drilling depth of the deepest 5048m, horizontal section of the longest 972m, deepest deepest 3933.6m three new records. The smooth construction of the well has guiding significance for this type of well and has a good application prospect.