New Methods of Quantitatively Evaluate Effect of Profile Control
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摘要: 因为常规方法只能定性分析调剖措施的见效情况,所以为了定量描述注水井调剖改善吸水剖面的效果,提出了3种定量评价调剖效果的新方法,即采用注水井调剖变异系数、吸水剖面均质系数和注水井调剖前后劳伦兹曲线的不均匀系数来定量刻画调剖措施改善吸水剖面的均质程度。利用上述3种方法,对北三台油田多口注水井的吸水剖面资料进行了计算,取得了较好的应用效果。应用定量评价指标,可以直观看出注水井调剖后吸水剖面非均质性的改善程度,准确获知调剖措施的见效信息。该方法实用方便,可操作性强,能够满足现场应用的要求。Abstract: To quantitatively describe the effect of injection profile control of wells,we presented three new methods,which could be used to quantitatively evaluate heterogeneous degree of profile control measures,through defining coefficient of variation of profile control wells,homogeneous coefficient of injection profile,uneven coefficient of the Lorenz curve before and after profile control.Results calculated from those methods are reasonable in the application in Beisantai Oilfield.We can directly see the improvement degree of heterogeneity of water injection profile after profile control,and accurately learn about the effective information of profile control measures from the quantitative evaluation indexes.This proved that the method is practical and convenient,and can meet the requirement of field application.So it demonstrated that the method using formula and Lorenz curve to quantitatively evaluate profile effect is feasible and instructive for profile control in water injection wells.
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Keywords:
- water flooding /
- profile control /
- quantitative description /
- Lorenz curve /
- injection profile
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