摘要
大量渗流实验证实,在一定条件下,气体在岩石中分别表现出二项式渗流效应、滑脱效应、阈压效应等非线性渗流规律。然而,沿用传统的基于达西渗流定律推导得出的实验数据分析方法,诊断特殊渗流效应的敏感性不足,难于准确计算相关特征参数,甚至影响常规的渗透率测定结果的准确性。根据目前对气体非线性渗流规律的实验总结认识,以实验岩心中的气体一维渗流为研究对象,通过数学推导得到了气体非线性渗流特征诊断方法和相关参数确定方法。应用此方法处理气体渗流实验数据,便于验证气体非线性渗流规律,在不同渗流效应特征识别、确定渗流参数等方面,其敏感性和稳定性均较传统方法有显著地提高。
Lots of seepage experiments confirmed that the gas displays different nonlinear seepage patterns in the rock under certain conditions,such as binomial seepage effect,slippage effect and threshold pressure effect,etc.However,its sensitivity is not enough to diagnose the particular seepage effect by adopting conventional experiment data analyzing method which is based on the Darcy Flow Law.It is very difficult to accurately calculate correlated characteristic parameter and even affect the reliability of the conventional seepage rate's measuring results.According to the general cognition of experiments on the gas nonlinear seepage pattern and taking the linear seepage of gas in the experimental rock core as the research object,the gas nonlinear seepage characteristics' diagnosis method and its correlating parameter's confirming method are obtained through mathematical development.Applying this method to deal with the experimental data of gas seepage is convenient for verifying the nonlinear seepage pattern of gas and its sensitivity and stability are remarkably boosted comparing to conventional methods on the aspect of identifying different seepage effects' features and confirming seepage parameters,etc.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2008年第4期127-129,共3页
Natural Gas Industry
关键词
渗流
实验
气体
非线性
特征
诊断
seepage,experiment,gas,nonlinear,characteristics,diagnosis
