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针对大庆深层气藏储层特点及深层水平井施工难点,在室内实验与现场应用的基础上,研究出了一套适合大庆深层水平井的水基钻井液体系,解决了水基钻井液携岩能力低、润滑性差、抗温性差等技术难题。该体系具有较好的抑制性、良好的井壁稳定性;能包被钻屑,有利于井眼清洁;具有良好的润滑性及抗温性,在大庆深层天然气徐深21-平1井应用效果显著,有较好的应用前景。
Aiming at the reservoir characteristics of deep gas reservoirs and the difficulty of deep horizontal well construction, a set of water-based drilling fluid system suitable for deep horizontal wells in Daqing is developed based on laboratory experiments and field applications. Low capacity, poor lubricity, poor temperature resistance and other technical problems. The system has good inhibition, good wall stability; can be coated drill cuttings, is conducive to wellbore cleaning; has good lubricity and resistance to temperature in deep deep Xuqing deep 21-Ping 1 well application The effect is significant and has a good application prospect.