本文關(guān)鍵詞： 致密油氣藏 滲流機理 微納米流動 微管 邊界條件 邊界粘滯層　出處：《浙江海洋大學》2017年碩士論文　論文類型：學位論文

【摘要】：在傳統(tǒng)的流體力學中,流體在固壁處流速為零,即無滑移邊界條件。在微納米條件下,由于固液界面作用力增大,無滑移邊界條件不再適用。該文首先從微米石英圓管中的流動實驗現(xiàn)象出發(fā),給出潤濕性邊界粘滯層厚度隨應力變化的邊界模型。在此基礎(chǔ)上推導出層流條件下,微納米管中的流量公式,并對流量公式進行漸近分析,同時也分析流動微納米尺度下的流動特征。接下來用微米圓管中去離子水的流動實驗,對新建的理論模型進行驗證;再將新模型應用于致密多孔介質(zhì),推導出考慮負滑移影響的滲流模型,并對滲流模型進行漸進分析,同時也用致密巖芯中去離子水的流動實驗,對新建的理論模型進行驗證。進而將新模型應用于油藏工程中求得其產(chǎn)能解,并對其產(chǎn)能及壓力分布分別進行理論分析。最后將單相非線性滲流模型推廣至兩相非線性滲流,推導出兩相在致密多孔介質(zhì)中的滲流模型,并再用致密巖芯中去離子水流動實驗驗證,分別又對滲透率及粘度比對致密油藏中兩相滲流的影響進行分析。研究表明:潤濕性條件下,邊界粘滯層厚度隨驅(qū)動力的增大而減小;新建立的微納米尺度下的邊界模型以及所運用的流量公式非常符合實驗結(jié)果,其中一次方的流量模型應用時更為簡單,在壓力梯度較小時,指數(shù)項起作用產(chǎn)生了非線性流動的效果;通過與利用核磁共振方法進行的可動油飽和度實驗所得出的結(jié)果相對比,可發(fā)現(xiàn)兩者所得到的實驗數(shù)據(jù)基本吻合。因此可以得出結(jié)論:當滲透率較低,可動油減少的情況下,與之相對應的邊界黏附層便會增厚;在水油兩相滲流條件下,即使飽和度不同,油水的靜態(tài)邊界層厚度也大多都幾近相似,其粘度比的變化與邊界粘附層的厚度相同,大都沒有明顯規(guī)律。
[Abstract]:In traditional hydrodynamics, the velocity of fluid at the solid wall is zero, that is, there is no slip boundary condition. The non-slip boundary condition is no longer applicable. In this paper, a boundary model of the thickness of the wettable boundary viscous layer varying with the stress is given based on the flow experiment in a micron quartz tube. On this basis, the laminar flow condition is derived. The flow formula in micronanotubes, and the asymptotic analysis of the flow formula, at the same time, the flow characteristics of the flow in the micro-nano scale are also analyzed. Then, the new theoretical model is verified by the flow experiment of deionized water in the micron circular tube. Then the new model is applied to the dense porous media, the seepage model considering the negative slip effect is deduced, and the seepage model is analyzed gradually. At the same time, the flow experiment of deionized water in the dense core is also used. The new model is applied to reservoir engineering to obtain its productivity solution, and its productivity and pressure distribution are analyzed respectively. Finally, the single-phase nonlinear seepage model is extended to two-phase nonlinear seepage flow. The seepage model of two phases in dense porous media is derived and verified by experiments of deionized water flow in dense cores. The effects of permeability and viscosity ratio on two-phase percolation in dense reservoirs are analyzed. The results show that the thickness of boundary viscous layer decreases with the increase of driving force under wettability condition. The new boundary model and the flow formula are in good agreement with the experimental results. The flow model of the first power is simpler when the pressure gradient is small. The effect of the exponential term on the nonlinear flow is obtained by comparing it with the results obtained from the movable oil saturation experiment conducted by nuclear magnetic resonance (NMR). It can be found that the experimental data obtained by the two methods are in good agreement with each other. Therefore, it can be concluded that when the permeability is low and the movable oil decreases, the corresponding boundary adhesion layer will become thicker, and under the condition of water and oil two-phase seepage, Even if saturation is different, the thickness of static boundary layer of oil and water is almost the same, and the change of viscosity ratio is the same as the thickness of boundary adhesion layer, and most of them have no obvious regularity.
【學位授予單位】：浙江海洋大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE349

【參考文獻】

相關(guān)期刊論文 前10條

1 李衛(wèi)東;吳亞芳;馬哲;蘇玉亮;;考慮滲透率變化的低滲透油藏非達西滲流模型[J];陜西科技大學學報(自然科學版);2015年02期

2 姜桂林;張承武;管寧;劉志剛;邱德來;;水在不同管徑超疏水性微管內(nèi)的流動特性[J];山東科學;2015年01期

3 姜龍燕;荀小全;王楠;楊帆;;致密油藏直井體積壓裂非穩(wěn)態(tài)產(chǎn)能評價模型[J];斷塊油氣田;2015年01期

4 徐棟;胡薦博;高盛馳;;儲層巖石毛管束模型研究[J];內(nèi)江科技;2014年08期

5 姜瑞忠;于成超;孔垂顯;陽旭;孫召勃;;低滲透油藏優(yōu)勢滲流通道模型的建立及應用[J];特種油氣藏;2014年05期

6 劉雄;田昌炳;姜龍燕;楊帆;徐秋楓;;致密油藏直井體積壓裂穩(wěn)態(tài)產(chǎn)能評價模型[J];東北石油大學學報;2014年01期

7 熊健;曾山;王紹平;;低滲透油藏變導流垂直裂縫井產(chǎn)能模型[J];巖性油氣藏;2013年06期

8 陳忠;;低滲透油藏流體滲流的數(shù)學模型及算法研究[J];石油天然氣學報;2013年12期

9 黃延章;楊正明;何英;王學武;駱雨田;;低滲透多孔介質(zhì)中的非線性滲流理論[J];力學與實踐;2013年05期

10 凌浩川;楊正明;肖前華;徐慶巖;;致密油儲層滲流新模型研究[J];科學技術(shù)與工程;2013年26期

相關(guān)會議論文 前1條

1 左加傳;宋付權(quán);;石英微管中兩相流體界面特征[A];第二十屆全國水動力學研討會文集[C];2007年

，

本文編號：1525911