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  本文關(guān)鍵詞：空氣泡沫驅(qū)替中的滲流場變化特征　出處：《西安石油大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 空氣泡沫驅(qū) 滲流特征 數(shù)值模擬

【摘要】：目前,我國大部分油田由于長期注水開發(fā),已處于特高含水期,井底壓力大幅下降,產(chǎn)量遞減加快,有效提高油藏最終采收率面臨巨大挑戰(zhàn)�？諝馀菽�(qū)作為一種提高采收率的新方法,結(jié)合了空氣驅(qū)油和泡沫驅(qū)油的雙重優(yōu)勢,但是目前國內(nèi)外關(guān)于注空氣泡沫的室內(nèi)實(shí)驗(yàn)、油藏數(shù)值模擬研究以及現(xiàn)場應(yīng)用等鮮有公開報道,未形成相應(yīng)的研究體系,并且空氣泡沫驅(qū)油機(jī)理以及各種油藏的適用性等仍需進(jìn)一步討論。本文采用填砂管來模擬空氣泡沫驅(qū)替中的滲流場變化,一共進(jìn)行了兩組不同滲透率下的空氣泡沫驅(qū)油實(shí)驗(yàn)。結(jié)果表明,在低滲透管中,空氣泡沫驅(qū)是水驅(qū)采收率的1.84倍,在中滲透管中,空氣泡沫驅(qū)是水驅(qū)采收率的3.25倍。在空氣泡沫驅(qū)替過程中壓力變化范圍很大,波動十分明顯,分析認(rèn)為是泡沫段塞封堵的緣故。本文還對室內(nèi)實(shí)驗(yàn)進(jìn)行了歷史擬合及數(shù)值模擬分析,并將空氣泡沫驅(qū)的滲流狀態(tài)分為啟動階段、驅(qū)替階段和突破階段。分析認(rèn)為,驅(qū)油的關(guān)鍵期是第二階段:該階段產(chǎn)液量和產(chǎn)油量增加迅速,氧氣消耗迅速,地溫稍有增加,產(chǎn)出端可檢測到CO2和CO。在分析了空氣泡沫驅(qū)的滲流變化特征之后,本文還運(yùn)用了數(shù)值模擬來評價油藏參數(shù)、開發(fā)參數(shù)及工藝參數(shù)等因素對注空氣泡沫驅(qū)油效果的影響,對注空氣泡沫開發(fā)礦場試驗(yàn)具有一定指導(dǎo)作用。
[Abstract]:At present, most oil fields in our country have been in the high water cut period due to long-term waterflooding development, the bottom hole pressure has been greatly reduced, and the production decline has been accelerated. As a new method to improve oil recovery, air foam flooding combines the dual advantages of air flooding and foam flooding. However, at present, there are few public reports on the indoor experiments of air foam injection, reservoir numerical simulation and field application, and no corresponding research system has been formed at home and abroad. Furthermore, the mechanism of air foam flooding and the applicability of various reservoirs need further discussion. In this paper, sand pipe is used to simulate the change of percolation field in air foam flooding. Two groups of air foam flooding experiments were carried out under different permeability. The results show that in low permeability pipe, air foam flooding is 1.84 times as high as water flooding recovery, and it is in medium permeable pipe. Air foam flooding is 3.25 times as high as water flooding recovery. The pressure variation range is very large and the fluctuation is very obvious in the process of air foam displacement. It is believed that the plugging of foam slug is the result of the analysis. The paper also carries on the historical fitting and numerical simulation analysis to the laboratory experiment, and divides the seepage state of the air foam flooding into start-up stage. The analysis shows that the key period of oil displacement is the second stage: the liquid production and oil production increase rapidly, oxygen consumption is rapid, and the ground temperature is slightly increased. CO2 and CO. can be detected at the output end. After analyzing the percolation characteristics of air foam flooding, numerical simulation is also used to evaluate reservoir parameters. The influence of development parameters and process parameters on the oil displacement effect of air injection foam has a certain guiding effect on the field test of air injection foam development.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TE357.46

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本文編號：1410020