Practical Application of Geological Engineering Integrated Horizontal Well Drilling Technology in Complex Fault Block Reservoir of Niger

Niger is located in the hinterland of Sahara Desert, where fault blocks are scattered and distributed in a zonal pattern. The typical fault block, Dibeilla N-1, whose reservoir is shallow and heterogeneous, and developed with strong edge-bottom water. The implementation of horizontal Wells faces many technical problems, such as formation identification while drilling, orientation in large porous sandstones, trajectory precise control and selection of completion method. Through technology integration and innovation, the geological engineering integrated horizontal well drilling technology of Niger is established. This technology integrates Petrochina's independent innovation product Near-bit Geosteering System (CGDS), establish an integrated geoengineering steering model. Based on the EICS remote technical support platform, the remote geosteering tracking decision and engineering parameter optimization while drilling operation mode are created, and the AICD intelligent flow control water sand control completion tool is selected. The application of the geology and engineering integrated horizontal well drilling technology supported the successful drilling of the first 6 horizontal Wells in the Niger project, realizing the precise control of the reservoir trajectory of horizontal Wells, the formation identification thickness of 2 m, the target rate of 100%, the reservoir drilling rate of 92%, the production of a single well increase by 2.3 times, effectively prolonging the water-free oil production cycle, and effectively supporting the goal achievements of high-production with few wells and high-efficiency development. It provides practical experience for the development and construction of the same type of reservoir.