Abstract: in order to measure effective drainage radius exactly, we propose the method based on gas flow and pressure of boreholes.
摘要为了准确的测定有效抽采半径，提出基于钻孔瓦斯流量和压力的测定方法。
This method can be used for conventional heavy oil reservoir to calculate ultimate drainage radius and reasonable well spacing through starting pressure gradient.
将研究结果应用于普通稠油油藏，给出了利用启动压力梯度确定极限泄油半径及合理井距的理论计算方法。
The effective radius and rational distances between bores of drainage gas in coal seams are two of the fundamental parameters of the rational arrangement bores in the engineering of drainage gas.
在本煤层抽放瓦斯工程中，有效半径和钻孔间距是合理布置抽放钻孔的两个主要参数。
The effective radius and rational distances between bores of drainage gas in coal seams are two of the fundamental parameters of the rational arrangement bores in the engineering of drainage gas.
在本煤层抽放瓦斯工程中，有效半径和钻孔间距是合理布置抽放钻孔的两个主要参数。
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