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吐哈油田三塘湖盆地牛东区块是典型的孔隙-裂缝性火成岩低压储层,常规钻井中机械钻速低、易发生恶性漏失,给钻井及储层保护问题带来了相当大的挑战。为此,本文根据漏失速度,优化了充气钻井方式及注入气液排量,应用了“PDC+螺杆”的欠平衡复合钻井技术,使三塘湖油田原油日产量实现了千吨突破,同时解决了裂缝性储层井漏与提高了火成岩地层的机械钻速,为火成岩储层的快速高效开发提供了一条有效的途径。
The Niudong block in the Santanghu basin of Turpan-Hami Oilfield is a typical low-pressure reservoir with porosity-fractured igneous rock. The low penetration rate of conventional drilling and the easy occurrence of leakage are the major challenges for drilling and reservoir protection. Therefore, this paper optimizes the inflatable drilling method and the gas-liquid displacement according to the loss rate, and applies the “PDC + screw” underbalanced composite drilling technology to achieve a one-thousandth breakthrough in the daily production of crude oil in Santang Lake Oilfield It solves the leakage of fractured reservoirs and increases the penetration rate of igneous rock stratum, which provides an effective way for the rapid and efficient development of igneous reservoirs.