Research on trajectory design method of spoon-shaped horizontal well group in"well plant"
The"well plant"horizontal well operation mode has become a key technology for the economical and effective development of unconventional reservoirs.However,due to the relatively dense wells and short distance between adjacent wellheads,the horizontal well collision risk is high.The conventional well track profile design method will result in a large area of dead oil zone under the well factory operating platform.It is difficult to use the dead oil area again in the late stage of development.In order to solve the problem of wellbore collision and reduce the dead oil area,the optimization design method of scoop hole track profile of horizontal well group was studied.In the optimization of well track,the staggered well layout method was adopted for the well site first,and the target distance of each horizontal well and the position of deviation point were combined and optimized to ensure that the target location could control the whole area,so as to construct the optimal horizontal group scoop well track profile.The field application shows that although the friction of running string and casing in spoon-shaped horizontal wells is slightly increased compared with that in conventional horizontal wells,it will not affect normal drilling and completion operations.In contrast to the"well plant"horizontal well set with a conventional well track and a spoon track,the spoon track reduces the target displacement to 0 m at the same build slope,effectively reducing the dead oil area and better avoiding wellbore collision risk,which improves economic efficiency when developing tight oil.
万方数据
