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根据水平井中泄油孔的产能预测方法 ,分析了油层厚度、油层各向异性、泄油孔在油层中的位置等因素对确定泄油孔长度和泄油孔个数的影响 .结果表明 :随着泄油孔长度的增加 ,原油产量也增加 ,当孔长达到一定值后 ,钻井成本增加 ,而原油产量增加幅度降低 ;当泄油孔数达到一定值后 ,泄油孔长度较短的油井与较长油井的预测产量比值为一常数 ;最佳泄油孔的数量与泄油孔长度无关 ,泄油孔在油层中的位置对薄油层产能影响更大 .
According to the productivity prediction method of horizontal well, we analyzed the influence of the thickness of oil layer, the anisotropy of oil layer and the position of the oil drain hole in the oil layer on the determination of the length of drain hole and the number of drain holes.The results show that With the increase of the length of the drain hole, the crude oil output also increases. When the hole length reaches a certain value, the drilling cost increases and the increase of the crude oil output increases. When the number of the drain holes reaches a certain value, the oil well with shorter drain hole length And the predicted production ratio of a longer oil well is a constant. The optimal number of oil drain holes has nothing to do with the drain hole length. The location of the oil drain hole in the oil layer has a greater impact on the productivity of the thin oil layer.