强非均质气藏废弃地层压力的确定  

Determination of Abandoned Formation Pressure for Gas Reservoir with Strong Heterogeneity

作　　者：兰义飞[1] 郭辉[1] 刘志军[1] 王彩丽[1] 何丽萍[1] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院

出　　处：《低渗透油气田》2008年第1期61-66,共6页

摘　　要：传统的废弃压力评价方法，如经验法、气藏埋深法等，只是考虑原始地层压力、气藏埋深对于气藏废弃地层压力的影响，没有考虑储层物性及其他相关因素的影响，计算结果往往具有偏差。本文提出采用二项式产能方程法、数值模拟法对气藏的废弃压力进行评价，评价结果能够反映出气藏平面非均质特征，并考虑到不同废弃条件对于废弃地层压力的影响，因此计算结果较为可靠。另外本文首次提出了二项式产能方程法的具体迭代求解过程，并编写了相应程序，提高了效率及精度。Traditional abandoned formation pressure evaluation methods, such as, thumb rule, gas reservoir cover depth method, consider only the influence of initial formation pressure and gas reservoir buried depth, without reservoir physical properties and other factors, on the abandoned formation pressure. So the result of the methods is inaccurate. In this paper, two methods, that is, binomial deliverability equation and numerical simulation method are worked out for abandoned formation pressure evaluation. The two methods can reflect the plane heterogeneous feature of the reservoir and other influence factors, so the result of the two methods is accurate. On the other hand, it is in this paper to put forward, for the first time, an extensional iteration method of binomial deliverability equation, and is compiled with the calculation program, thereby it improves the efficiency and accuracy.

关 键 词：气井 废弃产量 二项式产能方程 废弃地层压力 数值模拟 

分 类 号：TE332[石油与天然气工程—油气田开发工程]