The calculation of productivity and the choice of well pattern of mixedhorizontal and vertical wells were discussed in this paper. Because the naturall drainage areas ofhorizontal wells are oval rather than circular, ...The calculation of productivity and the choice of well pattern of mixedhorizontal and vertical wells were discussed in this paper. Because the naturall drainage areas ofhorizontal wells are oval rather than circular, rectangular drainage well patterns should beadopted. Using pseudo 3-di-mensional method and conformal transformation, the potential function ofa row of horizontal wells was deduced. Using this function and the superposition principle, ananalytical solution of the productivity for the rectangular mixed well pattern was given.Quantitative means for defining the shapes of the optimum pattern were developed in this paper byintroducing two dimensionless parameters, the shape factor and dimensionless length of horizontalwell. The formula for productvity was used to optimize the mixed well patterns. The curves of theoptimized shape factor against dimensionless length of horizontal well were drawn. The results showthat the pattern area and formation thickness have no effect on the optimal shape factors and can beapplied to the design of development for oil fields.展开更多
文摘The calculation of productivity and the choice of well pattern of mixedhorizontal and vertical wells were discussed in this paper. Because the naturall drainage areas ofhorizontal wells are oval rather than circular, rectangular drainage well patterns should beadopted. Using pseudo 3-di-mensional method and conformal transformation, the potential function ofa row of horizontal wells was deduced. Using this function and the superposition principle, ananalytical solution of the productivity for the rectangular mixed well pattern was given.Quantitative means for defining the shapes of the optimum pattern were developed in this paper byintroducing two dimensionless parameters, the shape factor and dimensionless length of horizontalwell. The formula for productvity was used to optimize the mixed well patterns. The curves of theoptimized shape factor against dimensionless length of horizontal well were drawn. The results showthat the pattern area and formation thickness have no effect on the optimal shape factors and can beapplied to the design of development for oil fields.
