混合充气钻井技术在深井盐水层段的应用

Application of mixed aerated drilling technilogy in deep well saltwater interval

鲁立强

LU Liqiang" class="mainColor" data-relate="">

中国石油集团长城钻探工程有限公司

Greatwall Drilling Company, CNPC, Beijing 100101, China

轮台126 井在钻井过程中遇到地层产水量、使用单一流体钻井工艺无法钻进的难题，对雾化、泡沫、充气钻井等工艺的特点及实施条件进行了研究分析，在轮台126 井?311.2 mm 井眼（井深3 900~5 000 m）砾石层井段应用了混合气相流态钻井技术，克服了由于复杂地层施工条件雾化或者泡沫单一钻井流体无法实施钻进的难题，解决了增压机压力级别不能满足实施深井充气钻井技术的问题，避免了由于处理复杂事故造成的非生产时间，成功实现了砾石层安全快速的钻井目的，证明了混合气相流态气体钻井技术是解决深井高产水地层钻井困难的较有效的方法。

Formation was encountered during drilling of Well 126 which produced large volume of water, so single fluid drilling technology could not proceed with drilling. Research and analysis was conducted to the characteristics and implementation conditions of mist, foam and aerated drilling techniques. In the gravel layer interval of ?311.2 mm hole the depth is 3 900-5 000 m in Luntai Well 126, the mixed gas phase flow regime drilling technology was employed, which overcame the difficulty of being unable to proceed with drilling using single mist or foam drilling fluid due to complex formation construction conditions, solved the problem that the pressure rating of supercharger could not meet the requirement of aerated drilling technology in deep wells, avoided the non-production time due to handling of complex accidents, successfully realized the goal of safe and fast drilling in gravel layer and proved that the mixed gas phase fluid regime drilling technology is the most effective method to solve the difficulty of drilling in high water-production formaitons in deep wells.

10.13639/j.odpt.2016.01.003