塔里木盆地满深1井超深井钻井关键技术

满深1井是位于塔里木盆地塔北隆起满深1号断裂带上的一口预探井，钻井过程中存在二叠系玄武岩漏失与垮塌同存，志留系塔塔埃尔塔格组可钻性差、钻头磨损快，奥陶系桑塔木组易井斜与井壁失稳垮塌等技术难点。为此，研究应用了二叠系优快钻井技术、志留系减振提速技术和奥陶系防斜防塌技术，有效解决了该井面临的钻井技术难点:应用混合钻头+螺杆钻具提速技术一趟钻钻穿二叠系玄武岩地层，应用聚磺钻井液体系确保了二叠系地层的安全钻进，未发生漏失及垮塌等井下故障，与邻井相比机械钻速提高了265.96%；应用个性化PDC钻头+TorkBuster扭力冲击器一趟钻钻穿志留系地层，且钻进期间扭矩稳定、粘滑振动弱，减振提速效果明显；应用预弯曲动力学防斜钻具组合钻进奥陶系高陡地层，防斜打直效果明显；应用高性能防塌水基钻井液安全钻穿奥陶系硬脆性泥岩，井壁稳定效果显著。该井试油获得高产工业油流，实现了塔里木盆地超深层油气勘探的重大突破，形成的超深层碳酸盐岩钻井完井技术为塔里木油田深层油气勘探开发提供了技术支撑。 

Key Drilling Technologies for the Ultra-Deep Well Manshen 1 in the Tarim Basin

Well Manshen 1 is a pre-exploration well deployed on the Manshen No. 1 fault zone of the Tabei uplift in the Tarim Basin. During the drilling process, this well suffered from both lost circulation and the collapse of Permian basalt. Further, the development of the well was challenged by poor drillability and rapid bit wear in Silurian Tataaiertage Formation, and the slanting and wellbore instability/collapse in Ordovician Santamu Formation. Through technical research, a series of technologies and interventions strategies such as Permian “2X Excellence” drilling, the Silurian vibration reduction and accelerated drilling, and the Ordovician anti-slanting/ collapse drilling were developed, which effectively solved those challenges. The application of hybrid drilling bit+ PDM fast drilling technology successfully penetrating Permian basalt in one trip; the application of polysulfonate drilling fluid system ensuring the safe drilling in Permian strata, and eliminating the downhole failures such as leakage and collapse. Compared with the adjacent wells, the ROP was increased by 265.96%; the customized PDC bit + TorkBuster torque impactor successfully penetrating Silurian strata in one trip, the torque was stable and the stick-slip vibration was weak during the drilling, and the effects of vibration reduction and speed up were clear. The application of pre-bending downhole motor BHA successfully allowed the drillbit to penetrae the Ordovician large dip-angle strata. In this, the anti-slanting effect was obvious; the application of high-performance anti-collapse water-based drilling fluid system safely drilling through the Ordovician hard and brittle mudstone, which achieved a remarkable borehole stabilization effect. This well achieved high-production industrial oil flow drilling oil testing, brought about a major breakthrough in ultra-deep oil and gas exploration of the Tarim Basin, and initially formed the ultra-deep carbonate drilling/completion technologies, which provided technical supports and best practice for the deep oil and gas exploration & development the of Tarim Oilfield.