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首页> 外文会议>SPE annual technical conference and exhibition;SPE 2002 >New Concepts of Dual-Completion for Water Cresting Control and Improved OilRecovery in Horizontal Wells
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New Concepts of Dual-Completion for Water Cresting Control and Improved OilRecovery in Horizontal Wells

机译：双重完成注水控制的新概念和改进水平井中的油 r n采收率

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The primary advantage of horizontal wells is the longrnpenetration and small pressure drawdown. Thus, horizontalrnwells have been used for developing reservoirs experiencingrnsevere water coning problems.rnHowever, several field experiences indicate thatrnhorizontal wells are also not free from the problem of waterrnconing (otherwise known as water cresting). In some fieldrnreports, water breakthrough into horizontal wells could bernquite dramatic and tend to erode the merit of highrndeliverability. Field experiences also indicate that thernhorizontal well fluid inflow profile is not uniform along thernwell but rather asymmetrically skewed toward the heel of thernwell. Thus water tends to breakthrough first at the heelrn(downstream end) and spread toward the toe-end (upstreamrnend) of the well.rnIn this paper, the authors present the result of a toolrndeveloped to effectively evaluate the problem of pressure lossrnin the wellbore and its effect on water cresting in horizontalrnwells. The tool incorporates the effects of several factors suchrnas in-situ pipe roughness, perforation size and perforationrndensity, axial fluid influx and two-phase oil-water flow. Thernresults could be extended to three-phase flow by adequate gasliquidrncorrelations.rnThe paper also presents a study of two innovativernconcepts of “smart” completions for controlling water crestingrnin horizontal wells: “tail pipe water sink” and “bi-lateral waterrnsink”. The technologies involve the segregated production ofrnoil and water in a dual completion with zonal isolation. Thernresults of this research using commercial numerical reservoirrnsimulators indicate that dual completions are capable ofrnreducing the incidence of by-passed oil at the toe of horizontalrnwells and improve oil recovery by over 7 percent.
机译：水平井的主要优势是渗透力长，压降小。因此，水平井已被用于开发遇到严重水锥问题的储层。然而，一些现场经验表明，水平井也没有水锥问题（也称为注水问题）。在某些油田报告中，水渗入水平井的现象可能非常严重，并且往往会侵蚀高产能的优点。现场经验还表明，沿水平井的水平井流体流入轮廓不是均匀的，而是朝着垂直井的根部不对称地倾斜。因此，水倾向于先在井的后跟（下游端）突破，然后向井的趾端（上游端）扩散。它对水平井中波峰的影响。该工具综合了几个因素的影响，例如原位管道粗糙度，射孔尺寸和射孔密度，轴向流体涌入和两相油水流量。通过适当的气液相关性，可以将结果扩展到三相流。本文还介绍了控制水平井注水的“智能”完井的两个创新概念：“尾管水槽”和“双边水槽”。这些技术涉及在区域隔离的双重完成下，分别生产出腈和水。使用商业数值油藏模拟程序进行的这项研究的结果表明，双完井能够降低水平井脚趾旁旁路油的发生率，并将采收率提高7个百分点以上。

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