水驱油田的Arps递减规律

ARPS DECLINE OF WATERFLOODING OILFIELDS.

总结了关于油田Ａｒｐｓ递减参数的分布规律与影响因素。根据对国内外大量文献的分析研究，筛选出了一种计算Ａｒｐｓ双曲递减参数的比较合理、比较简明、易于在计算机上实现的方法。应用这一方法处理了７５个中国水驱砂岩油田、１０个中国底水灰岩油田、１７个苏联水驱砂岩油田在递减阶段的实际数据。计算了相应的初始产量Ｑｉ、Ａｒｐｓ递减指数ｎ、初始递减率Ｄｉ，并制作了ｎ和Ｄｉ油田数分布的直方图。并得出了如下结论：①水驱油田服从Ａｒｐｓ递减规律，０＜ｎ＜１０的油田数占８５％～９０％；②ｎ由０逐渐增大时，油田数占的比例由多变少；③国内外水驱油田都有ｎ＞１０的情况出现，占油田总数的１０％～１５％；④在油田出现递减后的开发过程中，ｎ值是变化的；⑤水驱砂岩油田Ｄｉ的分布主要在０．１＜Ｄｉ＜０３段，底水灰岩油田主要在Ｄｉ＞０４段。

Distribution of Arps decline parameters and its effect factors of oilfields were summarized. In terms of analyses and research of references athome and abroad, a method for calculating Arps hyperbolic decline parameters has been screened, which is more reasonable, more simple and clear and much easierto use. By using this method, the data from 75 domestic waterflooding sandstoneoilfields and 10 bottom water limestone oilfields, and 17 waterflooding sandstone oilfields in the Soviet Union have been handled, corresponding Qi, n and Di have been calculated and the histograms about n and Di distribution on oilfield'snumber have been made. The conclusions have been drawn from the histograms: ①waterflooding oilfields followed Arps decline, Oilfield's number of 0<n<1 took 85%～90%; ② when n got larger gradually, ratio of oilfield's number changes from large to small; ③ n>0.1 could appear for waterflooding oilfields at home andabroad, its oilfield's number took 10%～15% in total; ④ during oilfield development after presence of declinine, n is a variable; ⑤ Di is mainly distributed in 0.1<Di<0.3 sections for waterflooding sandstone oilfields and in Di>0.4 sections for bottom water limestone oilfields.