本文關(guān)鍵詞： 水平井 井筒壓力 產(chǎn)能 氣水同產(chǎn) 耦合　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文以氣水同產(chǎn)水平井氣水兩相流為研究對象,綜合采用滲流力學(xué)、采氣工程、計(jì)算數(shù)學(xué)等方法,對氣水同產(chǎn)水平井的產(chǎn)能和井筒壓降進(jìn)行研究,取得了以下成果。 (1)調(diào)研并歸納了氣水兩相管流流型研究成果,分直井段、斜井段、水平段分別總結(jié)了各段的流型分類、流型判別條件及判別流程。 (2)分直井段、斜井段、水平段分別建立了壓降計(jì)算模型,編制了計(jì)算程序,用現(xiàn)場實(shí)例對計(jì)算結(jié)果進(jìn)行了驗(yàn)證,并分析了產(chǎn)量、水氣比、油管內(nèi)徑對井筒壓降的影響。通過將井斜數(shù)據(jù)導(dǎo)入程序的方法,把斜井段計(jì)算結(jié)果的精準(zhǔn)度提高了一個(gè)臺階。且該方法簡單易操作,具有較強(qiáng)的普適性。 (3)在歸納分析經(jīng)典水平井氣井、水平油井產(chǎn)能的基礎(chǔ)上,建立了基于相滲曲線的氣水同產(chǎn)水平井產(chǎn)能計(jì)算方法,并對影響產(chǎn)能的因素進(jìn)行了分析。該方法的優(yōu)點(diǎn)是可快速地將任意水平氣井及水平油井的產(chǎn)能公式推導(dǎo)為兩相水平井的產(chǎn)能公式,而無需從滲流部分開始推導(dǎo)。 (4)通過質(zhì)量守恒原理將水平井筒變質(zhì)量流和氣藏地層滲流耦合起來,建立了考慮井筒變質(zhì)量流的氣水同產(chǎn)水平井壓降模型。通過軟件編程實(shí)現(xiàn)了模型的求解,獲得了水平段沿程壓降分布及產(chǎn)量分布,并分析了儲層厚度、油管內(nèi)徑及生產(chǎn)水氣比等因素對壓降分布及產(chǎn)量分布的影響。 (5)通過導(dǎo)入水平井段井斜數(shù)據(jù)的方法,獲得了考慮重能壓降的水平井筒變質(zhì)量流和氣藏地層滲流的耦合結(jié)果。由于實(shí)例中的水平段起伏較大且不規(guī)則,故該耦合結(jié)果規(guī)律性也不明顯。但該方法開拓出了一個(gè)以往學(xué)者們沒有考慮到的視角,是一次非常有意義的嘗試。
[Abstract]:In this paper, the gas-water two-phase flow in gas-water co-producing horizontal wells is taken as the research object. The productivity and wellbore pressure drop of gas-water co-producing horizontal wells are studied by comprehensively adopting the methods of seepage mechanics, gas production engineering and calculation mathematics. The following results have been achieved. 1) the research results of flow pattern in gas-water two-phase pipe flow are investigated and summarized. The flow pattern classification, flow pattern distinguishing conditions and discriminating flow process are summarized respectively in the straight well section, inclined well section and horizontal section. The calculation model of pressure drop is established in the vertical section, the inclined section and the horizontal section, and the calculation program is compiled. The calculation results are verified by a field example, and the production rate and the ratio of water to gas are analyzed. The influence of tubing inner diameter on wellbore pressure drop. By introducing well deviation data into program, the accuracy of calculation results of inclined well section is improved by a step. This method is simple and easy to operate and has strong universality. 3) on the basis of induction and analysis of gas well and horizontal well productivity of classical horizontal well, the productivity calculation method of gas-water horizontal well with same production rate is established based on phase permeability curve. The advantage of this method is that the productivity formula of any horizontal gas well and horizontal well can be quickly deduced into the productivity formula of two-phase horizontal well. It does not need to be derived from the seepage section. 4) Coupling horizontal wellbore variable mass flow with gas reservoir percolation by mass conservation principle. The pressure drop model of gas-water horizontal wells with variable mass flow is established. The solution of the model is realized by software programming, and the distribution of pressure drop and output along horizontal section is obtained, and the reservoir thickness is analyzed. The influence of the inner diameter of tubing and the ratio of production water to gas on the pressure drop distribution and output distribution. 5) the coupling results of variable mass flow in horizontal wellbore and formation percolation of gas reservoir considering heavy energy pressure drop are obtained by introducing well deviation data of horizontal well section, because of the large fluctuation and irregularity of horizontal section in the example. Therefore, the regularity of the coupling results is not obvious, but this method opens up a visual angle which has not been considered by scholars in the past, and is a very meaningful attempt.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE37

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