【摘要】 保靖区块地质条件复杂，下志留统龙马溪组储层薄、埋藏深、热演化程度高，页岩气勘探开发面临巨大的挑战和困难，当前没有成熟的经验可借鉴。为此，遵循“三井合一”的勘探模式，围绕提速增效目标，积极开展一体化钻井研究和实践：（1）井位部署。在地震联合反演基础上，开展地震储层预测和含气性检测研究，首先钻直井获取储层参数，圈定有利区，然后钻水平井评价页岩气产能。（2）建立地质导向模型。根据过井地震、测井等资料，钻前建立地质导向模型，通过A—B标志层追踪，引导钻头钻进。（3）实施一体化钻井。上部井段使用井下螺杆钻具复合钻进储层，实现井眼轨迹精准控制；下部井段使用旋转导向钻井系统，通过人机交互的测量和控制技术，实时掌握钻头和地层的切割关系，实现对钻头的精确制导。结果表明：通过一体化钻井，能提高作业效率和获取地层参数，有利于储层评价，水平井平均钻速达到3.81m/h，储层钻遇率高达90.68%；实行“三井合一”的勘探模式，加快页岩气勘探开发进程。一体化钻井技术推动了复杂构造区页岩气的勘探进程，实现了页岩气的低成本和高效益开发，为同类地区页岩气勘探开发提供了借鉴。更多还原

【Abstract】 The geological conditions are complex in Baojing shale gas block, with characteristics of thin reservoir, great burial depth, and high degree of thermal evolution of the Lower Silurian Longmaxi Formation shale. The exploration and development of shale gas face great challenges and difficulties, with a scarcity of established experience to draw upon. Therefore, targeting at the goal of speed and efficiency improvement, the exploration mode of “three wells in one” has been applied, and research and practice of integrated well drilling technology have actively been conducted as follows:(1) Well location deployment. On the basis of seismic data inversion, seismic reservoir prediction and gas content detection are conducted. The vertical well is first drilled to obtain reservoir parameters and delineate favorable areas, and then the horizontal well is drilled to evaluate the shale gas production capacity.(2) Geological guidance model establishment. The cross well seismic and logging data are used to establish a geological guidance model before drilling, and then A-B marker bed is used to guide the bit drilling.(3) Implementation of integrated drilling. The upper well section is drilled by downhole screw drill tool to achieve the accurate control of wellbore trajectory. The rotary steering drilling system is applied to drill through the lower well section, and the interactive measurement and control technology is used to monitor the cutting of formation by the drill bit in real time, so as to ensure accurate guidance in the target window. The results show that the integrated well drilling technology enables to improve the drilling rate and accurately obtain formation geological parameters, which is conducive to reservoir evaluation, with a drilling rate of 3.81 m/h and a reservoir penetration rate of 90.68%. The implementation of “three wells in one” exploration mode accelarates the process of shale gas exploration and development. The integrated well drilling technology promotes the shale gas exploration progress in complex structural zone, achieves the low-cost and highefficiency shale gas development, and provides a reference for shale gas exploration and development in similar areas.更多还原