为解决苏北陆相页岩油储层钻进过程中卡钻频发、成井难度大等技术难题，开展了地质特征和室内实验评价分析，结果表明苏北陆相阜宁组二段泥页岩黏土矿物含量高，以伊/蒙混层为主，具有一定的水化分散性能，并具有明显的双亲性润湿特征。阜宁组二段泥页岩层理性强，钻井液滤液在压差和自吸作用下沿地层微裂隙侵入地层，引起泥页岩的局部水化，产生水化膨胀压，导致大量微裂缝延伸扩展，岩石整体性破坏，力学参数显著劣化，致使井壁失稳。据此针对性地制定了强化抑制+ 高效封堵+ 润湿反转的井壁稳定控制技术对策，达到外防水侵、内控膨胀的井壁稳定效果，可为后期陆相页岩油气水平井施工提供参考和借鉴。

In order to solve the technical problems such as frequent stuck drilling and difficult well completion in the continental shale oil reservoir in northern Jiangsu Province, the geological characteristics analysis and laboratory experiment evaluation were carried out. The results indicate that the Funing Formation in northern Jiangsu Province has high clay mineral content, which is dominated by I/M mixed layer, has quite a certain extent hydration and dispersion performance, and has obvious amphiphilic characteristics. The shale of the second layer of Funing Formation has strong bedding, and the filtrate of drilling fluid can easily intrudes into the formation along the micro-cracks under the pressure difference and imbibition effect, which causes local hydration of the shale and generates hydration expansion pressure, resulting in the extension and expansion of a large number of micro-cracks, rock integrity damage, and significant deterioration of mechanical parameters, resulting in wellbore instability. The technical measures for wellbore stability control of "enhanced inhibition + efficient plugging + wetting inversion" are specifically developed, which can achieve the wellbore stability effect of "external waterproof invasion and internal control expansion", which can provide reference for the later development of continental shale oil and gas.