發(fā)布時(shí)間：2018-03-21 17:02

  本文選題：低滲透巖石　切入點(diǎn)：克林伯格公式　出處：《巖土工程學(xué)報(bào)》2017年12期 　論文類型：期刊論文

【摘要】：低滲透巖石氣體滑脫效應(yīng)的研究是油氣開采與存儲(chǔ)領(lǐng)域十分重要的內(nèi)容,但目前關(guān)于低滲透巖石氣體滑脫效應(yīng)的研究大多是在氣體單相流下進(jìn)行的,對(duì)于氣 液兩相流時(shí),液體對(duì)氣體滑脫效應(yīng)的影響,所做的研究不足。因此,利用研發(fā)的低滲透巖石惰性氣體滲透性測(cè)試系統(tǒng),對(duì)含水飽和度為0~70%的低滲透砂巖,進(jìn)行了不同含水飽和度的低滲透巖石氣體滑脫效應(yīng)及有效滲透率變化規(guī)律的研究,試驗(yàn)結(jié)果表明:(1)二次公式k_g=k_∞(1+b/q-a/p~2)可以較為準(zhǔn)確的解釋低滲透巖石的氣體滑脫效應(yīng),準(zhǔn)確性明顯高于Klinkenberg公式。(2)含水飽和度對(duì)低滲透巖石的氣體滑脫效應(yīng)有明顯影響,氣體滑脫效應(yīng)隨著含水飽和度增大而減少,在含水飽和度超過(guò)50%時(shí),氣體滑脫效應(yīng)幾乎完全被限制。(3)由于水的作用,含水的低滲透巖石隨著圍壓增大,氣體滑脫效應(yīng)減少,這與克氏理論的結(jié)論相反。(4)含水飽和度對(duì)低滲透巖石的有效滲透率影響顯著,隨含水飽和度的增大有效滲透率減少,且圍壓越大,低滲透巖石的有效滲透率對(duì)含水飽和度變化越敏感。(5)低滲透巖石的有效滲透率與含水飽和度符合冪函數(shù)關(guān)系,即k_∞=k_0(1-S_w)~c。
[Abstract]:The study of gas slippage effect in low permeability rock is very important in the field of oil and gas extraction and storage. However, at present, most of the researches on gas slip effect of low permeability rock are carried out under single phase gas flow, and for gas / liquid two phase flow, The effect of liquid on gas slippage is not well studied. Therefore, using the developed low permeability rock inert gas permeability test system, a low permeability sandstone with water saturation of 0% or 70% is studied. The gas slippage effect and effective permeability variation law of low permeability rock with different water saturation are studied. The experimental results show that the gas slippage effect of low permeability rock can be explained more accurately by the quadratic formula KG / K _ 鈭，

本文編號(hào)：1644756