制作含水率与采出程度关系理论曲线常犯错误及解决办法

doi:10.11743/ogg20050321

Abstract

Abstract:

Relative permeability curve method and stream-tube method are commonly used to plot theoretical curves of water-cut vs.recovery percent of reserves.When the former method is used to plot the theoretical curves,the relationship between relative permeability and water cut is often analyzed through statistical and regression analyses,resulting in water cut tends to be high in low water saturation stage,and tends to be low in high water saturation stage. This problem can be solved by directly using experimental data to calculate.If a constant value is assigned to volumetric sweep efficiency,a universal conclusion is often obtained,i.e.development effects are relatively poor in medium-low water cut stage,and are relatively good in high water cut stage.This problem can be solved by establishing statistical relational expression through analyzing the relationship between volumetric sweep efficiency,mobility ratio in a pattern system and permeability variation coefficient.

Key words: volumetric sweep efficiency, stream-tube method, evaluation of development effect, oilfield development

CLC Number:

TE319

Fan Zheyuan, Yuan Xiangchun, Liao Rongfeng, Shu Qinglin. Common problems and solutions in plotting theoretical curves of water-cut vs. recovery percent of reserves[J]. Oil & Gas Geology, 2005, 26(3): 384-387.

References

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Common problems and solutions in plotting theoretical curves of water-cut vs. recovery percent of reserves

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