1)  decreasing sequenee of numbers
递减数列
2)  decline
递减
1.
Calibrating horizontal well recoverable reserves of old field with graduation-decline method;
应用修匀—递减法标定老区水平井可采储量
2.
We take the controlling of the pressure decline rate in low pressure area,the controlling of the pressure build-up rate in high pressure area as a principle.
通过采取以上措施,该区不但未发生新的成片套损,而且平均钻1口井仅影响产量115t,自然递减为7。
3.
If wells produce at natural productivity,their flow rates decline with the same speed as the mid-and high-permeability reservoirs.
若油井以自然产能生产,油井产量的递减速度并不快,而是与中高渗透储集层基本相同。
3)  decrease
递减
1.
Using the steam huff and puff temperature field, saturation field result and the in-situ monitoring data of high temperature steam intake and liquid-producing profiles, well temperature profile, the primary factors that the super-heavy crude single well convention steam huff and puff high cycle decreases progressively are analyzed.
以辽河油田曙一区超稠油油藏为例,利用蒸汽吞吐温度场、饱和度场拟合结果及高温吸汽剖面、产液剖面、井温剖面等现场监测资料,分析了超稠油单井常规蒸汽吞吐高周期递减的主要因素。
4)  exponential decline
指数递减
5)  production decline
产量递减
1.
A new method on index forcast of production decline in oil reservoirs;
油藏产量递减指标预测新方法研究
2.
The application of production decline analysis for gas wells;
气井产量递减分析方法应用
3.
Influencing factors of production decline in fault block oil reservoirs in Shengli Oilfield;
胜利油田断块油藏产量递减影响因素
6)  decline rule
递减规律
1.
Aim To esplore the decline rule and recovery efficiency of Yanchang Oilfield.
目的对延长油田递减规律和采收率进行深入研究。
2.
Using gas reservoir engineering theory,gas well production performance,dynamic analysis method of gas reservoir,this paper has studied the basic development characteristics of Baiyinnuole gas field,defining gas reservoir drive type,gas field dynamic reserves,rational gas production rate as well as gas well production decline rule.
应用气藏工程理论、气井生产动态资料、气藏动态分析方法,对白音诺勒气田的主要开发特征进行了研究,确定了气藏驱动类型,气田动态储量,合理的采气速度及气井产量递减规律,对该气田下步的合理开发利用具有重要的指导意义。
参考词条
补充资料:数列
数列
number,sequence of
    按照一定次序排列着并且能依次与自然数1,2,……(或由1到n)对应的一列数。由有限个数排成称为有限数列;由无穷多个数排成的称为无穷数列。每个数列都可以看作是定义在自然数集N或其子集{1,2,…,n}上的函数。数列中每个位置上的数都称为项。第一个位置上的数称为首项,第二个称为第二项,依此类推。如果数列的第n项可以用一个含有n的解析式来表示,并且n能代表任意项数,那么这样的解析式称为数列的通项公式。例如,全体正偶数由小到大排成的数列2,4,6,…,第nan可表为2nan=2nn=1,2,…)就是通项公式;正奇数数列1,3,5,…的通项公式是an=2n-1 。当一个数列的通项公式已被掌握时,这个数列的性质就可以用数学方法进行分析研究。如果数列{an}的各项满足an+1an (an+1an),n=1,2,…,就称数列{an}为递增(严格递增)数列;如果满足an+1anan+1αn),n=1,2,…,就称为递减(严格递减)数列。如果数列{an}的各项对于某个正数M,满足|an|≤Mn=1,2,…,就称数列{an}为有界数列。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。