Determination of optimum horizontal section location and length for horizontal wells in bottom water reservoir

The vertical location and the horizontal section length of horizontal wells in bottom water reservoir are the important factors affecting the well production, and the optimum horizontal location and length can not only save the production cost, but also obtain the best production effect. Based on achievement of research before, the author studies the relationship between the critical production rate and the vertical location, puts forward the calculation methods of the optimum horizontal location and builds up the mathematical model of the optimum horizontal length. Thus a new systematic designing method for horizontal wells in bottom water reservoir is established. This research result worked well in the field application, and provides the theoretical basis for the optimization design of horizontal wells in reservoirs with bottom water, with theoretical and practical significance for the high and stable production and longer water free production period.