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水平井分段完井是目前高效开发底水油藏的唯一手段,在国内外已得到了广泛应用,但就分段完井参数对底水脊进影响的研究却甚少。运用势叠加原理和镜像反应原理导出了水平井分段完井井筒与油藏渗流耦合计算模型,继而再运用物质平衡法建立了水平井分段完井底水突破模型。实例计算与对比表明模型准确度高,继而计算研究了分段完井参数对底水脊进的影响。结果表明:增加打开程度,盲管段的底水突破高度及各生产段的底水突破时间均逐渐增加。移动盲管段位置,盲管段的底水突破高度及时间也相应移动;将盲管段从跟端向趾端移动,靠近跟端的生产段的底水突破时间小幅增加,靠近趾端的则小幅减小。增加打开段数,盲管段的底水突破高度及各生产段的底水突破时间均小幅增加。
Horizontal well completion is the only effective way to develop bottom water reservoirs at present. It has been widely used both at home and abroad. However, little research has been done on the effect of subsection completion parameters on bottom water ridges. Based on potential superposition principle and mirror reaction principle, the coupling calculation model of horizontal well completion wellbore and reservoir seepage was derived. Then, the horizontal well completion bottom water breakthrough model was established by material balance method. The calculation and comparison of the examples show that the model is of high accuracy, and then the influence of section completion parameters on the bottom water ridges advancement is calculated. The results show that increasing the degree of opening, the bottom water breakthrough height of the blind pipe section and the bottom water breakthrough time of each production section gradually increase. The location of the blind pipe segment and the bottom water breakthrough height of the blind pipe segment also moved correspondingly. The blind pipe segment moved from the heel end to the toe end, and the bottom water breakthrough time of the production segment near the heel end increased slightly while that near the toe end decreased slightly. Increasing the number of open sections, the bottom water breakthrough height of the blind pipe section and the bottom water breakthrough time of each production section all increased slightly.