夹层对底水锥进抑制作用的研究

A Study on the elimination of barrier to bottom water coning

从研究底水突入油井的机理出发，讨论了底水上窜绕过夹层的过程。根据Ｋ．Ｈ．Ｃｏａｔｓ的底水流模型，计算了底水绕过夹层时的累积水侵量，详细讨论了夹层所在位置、大小和厚度对底水锥进的影响。研究表明：处于油水界面之上的夹层对底水锥进能有效抑制，提高了开采效果；夹层半径越大，对水侵量的减小越大，其有效作用时间越长；夹层的作用还同油层的非均质性和开采速度密切相关；有夹层的油藏。

A study is made on the mechanism of bottom water coning in well, and the shape of the bottom water coning through the barrier. Based on Coats bottom water flow model, calculate the botom water influx when it coning through the barrier, and study the function of the location of barrier size and height to bottom water coning. The results indicated that the barrier on the oil/water contact has the big effect on elimination of bottom water coning, and can increase exploit effect; the bigger the barrier is ,the more decrease the bottomwater influx,and the longer its valid time. On the other hand, the strata heterogeneity and exploration speed have the effect on the barrier working on bottom water coning. In addition, extract speed and penetrate degree of reservoir with barrier may rise to some extent.