存在续流的压力恢复资料的分析新方法——修正霍纳法  

A New Method for Buildup Tests Analysis with Afterflow——The Modified Horner Method

作　　者：陈耀良 申炼[2] 

机构地区：[1]青海石油管理局 [2]江汉石油学院

出　　处：《江汉石油学院学报》1992年第2期64-71,共8页Journal of Jianghan Petroleum Institute

摘　　要：根据物质平衡原理,考虑了续流量对地层压力影响的永恒性,给出了一种分析存在续流的压力恢复资料的新方法——修正霍纳法。由各阶段续流特征,首先提出了纯井筒储集续流和弹性井筒储集续流两个新概念,然后导出油井的有效生产时间和有效压力恢复时间。依据压降叠加原理,得到油井关井压力恢复的修正霍纳法公式。由修正霍纳法得到的压力恢复曲线是由井底压力与相应修正霍纳时间组成的曲线,依据其直线段斜率和截距,可求出地层各参数。利用上述修正的霍纳法对实测数据进行了计算,结果表明,该方法是实用的,尤其对低渗透层将会显得非常重要。The modified Horner method is a new technique to analyze the data from pressure buildup tests with afterflow. It is shown that afterflow has a permanent affect on the pressure distribution account for the total volume of fluid produced from the formation. In the method, two new concepts are first presented, defined as pure well storage afterflow and elastic well storage afterflow, then it gets out the effective flowing (t_p+Δt_p) and effective buildup times (Δt_e). It is proved here that. with its use of corrected values for t_p and Δt, as well as afterflow time, the modified Horner equation can be devided by superposition principle, The pressure is plotted against the modified Horner times The permeability (k) and skin (S) are estimated by the slope and intercept of the modified Horner curve. This method is illustrated using field and simulated buildup tests.

关 键 词：试井 压力 恢复 压力降 修正 

分 类 号：TE353[石油与天然气工程—油气田开发工程]