A Factory-Like Drilling Technology of Horizontal Wells for Tight Sandstone Reservoirs in the Jimusaer Area

In order to accelerate the development of tight sandstone reservoirs and reduce the drilling cost to meet the demand of large-scale development,the factory-like drilling technology of horizontal wells for tight sandstone reservoir was researched.According to the geological characteristics of the Jimsaer area and requirements of facrory-like drilling and completion for horizontal wells,the casing program was designed into three sections,and made the technical measures of controlling well trajectory based on the characteristics of cluster horizontal wells.Landmark software scanning was used to prevent two adjacent wells from colliding at key intervals,and the ROP of drilling directional and horizontal sections was improved by employing a rotary steering tool,the PDM and hydro-oscillator.The technique was applied in order to drill eight horizontal wells in tight sandstone reservoir on different platforms in Jimusaer area,and the well trajectories were well controlled.They basically met the need of planning,which successfully realized the anti-collision and detouring.Two horizontal wells in platform 2# bypassed the barrier to 115 meters respectively,one well in platform 3# even bypassed to 265 meters.Compared with the three horizontal wells that drilled in 2012,the average ROP was raised by 240 % in the vertical section and 125.9 % in horizontal section.The paper showed that the technology of factory-like drilling of horizontal wells for tight sandstone reservoir can effectively prevent well collision,reduce drag and friction,improve ROP significantly,and meet the demands of large-scale development of tight sandstone reservoir in the Jimusaer Area.