| 非达西渗流拟启动压力梯度推算 |
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| 引用本文： | 徐德敏,黄润秋,刘永平,刘云鹏.非达西渗流拟启动压力梯度推算[J].工程地质学报(英文版),2011,19(2):225-230. |
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| 作者姓名： | 徐德敏 黄润秋 刘永平 刘云鹏 |
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| 作者单位： | 1.中国水电顾问集团成都勘测设计研究院 成都 610072; |
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| 基金项目： | 国家自然科学基金雅砻江水电开发联合研究基金重点资助项目(50539050) |
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| 摘 要： | 岩体启动压力梯度的大小是石油开采,工程防渗处理等方面需要考虑的影响因素.非线性渗流现象已被广泛所认同,低渗透性岩渗流存在启动压力梯度,它基本代表了流体产生渗流时的压力梯度大小.试验对试样进水端水压进行长期稳定控制,出水端采用精确测定流出水体积变化量的方法进行流量测定;当渗出端水体积的变化量与时间呈直线关系时,即认为该时...
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| 关 键 词： | 非线性渗流 拟启动压力梯度 三次平均法 体变量法 绝对渗透系数 |
| 收稿时间： | 2010-08-20 |
LABORATORY TESTS FOR DETERMINATION OF THRESHOLD PRESSURE GRADIENT FOR NON-DARCY FLOW IN LOW PERMEABLE ROCK MASS |
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| XU Demin HUANG Runqiu LIU Yongping LIU Yunpeng.LABORATORY TESTS FOR DETERMINATION OF THRESHOLD PRESSURE GRADIENT FOR NON-DARCY FLOW IN LOW PERMEABLE ROCK MASS[J].Journal of Engineering Geology,2011,19(2):225-230. |
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| Authors: | XU Demin HUANG Runqiu LIU Yongping LIU Yunpeng |
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| Institution: | 1.Hydrochina Chengdu Engineering Corporation,Chengdu 610072;2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059;3.China Railway Eryuan Engineering Group Co. Ltd.,Chengdu 610031 |
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| Abstract: | The threshold pressure gradient is defined as the initiation condition of occurring seepage flow in low permeable rock mass.This value is an important factor in oil production and engineering against leakage,because of the existence of nonlinear infiltration phenomenon in the rock mass.This paper presents a laboratory test method and associated test results to determine the threshold pressure gradient value.During the test,the inlet water pressure of the test sample is stably controlled for long time.The ou... |
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| Keywords: | Nonlinear infiltration Quasi-threshold pressure gradient Averaged three times method Volume change method Absolute permeability coefficient Seepage |
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