本文關(guān)鍵詞：東方13-1高溫高壓氣藏凝析水析出規(guī)律及積液風(fēng)險(xiǎn)研究　出處：《重慶科技學(xué)院》2017年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 凝析水 析出規(guī)律 臨界攜液流量 氣井產(chǎn)能 積液風(fēng)險(xiǎn)

【摘要】：東方13-1氣藏屬于典型的高溫高壓氣藏。由于氣藏溫度較高,烴類(lèi)流體與地層水的互溶能力較強(qiáng),天然氣中水蒸氣含量也比普通氣藏高。在此類(lèi)氣藏的開(kāi)發(fā)過(guò)程中,隨著溫度、壓力的變化,天然氣容易析出凝析水。無(wú)論凝析水的析出發(fā)生在儲(chǔ)層中還是井筒內(nèi)都將影響氣藏的開(kāi)發(fā)效果。針對(duì)東方13-1高溫高壓氣藏凝析水析出規(guī)律認(rèn)識(shí)不清,積液風(fēng)險(xiǎn)分析不足的現(xiàn)狀,本文從實(shí)驗(yàn)出發(fā),對(duì)凝析水的析出規(guī)律進(jìn)行了研究,綜合臨界攜液流量和氣井產(chǎn)能研究結(jié)果,對(duì)氣井的積液風(fēng)險(xiǎn)進(jìn)行了分析,取得了以下成果和認(rèn)識(shí):(1)在調(diào)研的基礎(chǔ)上,建立了一套高溫高壓氣藏凝析水析出規(guī)律研究的實(shí)驗(yàn)方法,開(kāi)展了相關(guān)實(shí)驗(yàn)。實(shí)驗(yàn)結(jié)果表明:天然氣含水量隨壓力的降低而升高,隨溫度的升高而升高;天然氣中的水蒸氣不會(huì)在儲(chǔ)層中析出,但會(huì)在井筒中析出。(2)通過(guò)開(kāi)展核磁共振實(shí)驗(yàn),進(jìn)行了氣井產(chǎn)水來(lái)源研究。實(shí)驗(yàn)結(jié)果表明:因膨脹而被采出的束縛水量極少;氣藏壓力降低后,束縛水會(huì)以水蒸氣的形式進(jìn)入天然氣中,進(jìn)而導(dǎo)致天然氣中水蒸氣含量增加。(3)綜合考慮井眼軌跡、氣井溫壓分布、界面張力變化等因素建立了新的臨界攜液流量計(jì)算模型。研究結(jié)果表明:氣井臨界攜液流量是一個(gè)動(dòng)態(tài)變化的量,受氣藏的溫度、壓力、生產(chǎn)水氣比以及氣井的井身結(jié)構(gòu)、油管大小、工作制度等因素影響,應(yīng)根據(jù)氣藏與氣井的基本情況和生產(chǎn)動(dòng)態(tài)對(duì)氣井臨界攜液流量進(jìn)行計(jì)算。(4)總體看來(lái),對(duì)于東方13-1氣藏而言,在產(chǎn)出水主要為凝析水的情況下,氣井積液風(fēng)險(xiǎn)較低,采用合理的生產(chǎn)制度可以避免積液。
[Abstract]:Dongfang 13-1 gas reservoir is a typical high temperature and high pressure gas reservoir. The water vapor content in natural gas is also higher than that in ordinary gas reservoirs. It is easy to precipitate condensate water from natural gas. Whether the precipitation of condensate water occurs in the reservoir or in the wellbore, it will affect the development effect of gas reservoir. It is not clear to understand the law of condensate water precipitation in Dongfang 13-1 high temperature and high pressure gas reservoir. In this paper, the precipitation law of condensate water is studied from experiments, and the risk of gas well accumulation is analyzed by synthesizing the results of critical liquid carrying rate and gas well productivity. On the basis of investigation and investigation, a set of experimental methods for the study of precipitation law of condensate water in high temperature and high pressure gas reservoir have been established. The experimental results show that the water content of natural gas increases with the decrease of pressure and increases with the increase of temperature. Steam in natural gas does not precipitate in the reservoir, but precipitates in the wellbore. The source of water production in gas wells has been studied. The experimental results show that very little bound water is produced because of expansion. When the pressure of gas reservoir is reduced, the bound water will enter into natural gas in the form of water vapor, which will lead to the increase of water vapor content in natural gas. A new calculation model of critical liquid carrying flow rate is established by the change of interfacial tension and other factors. The results show that the critical liquid carrying rate of gas well is a dynamic change quantity, the temperature and pressure of gas reservoir. The production water gas ratio, well structure of gas well, tubing size, working system and other factors should be based on the basic situation of gas reservoir and gas well and production performance to calculate the critical liquid carrying rate of gas well. For Dongfang 13-1 gas reservoir, if the output water is mainly condensate water, the risk of gas well fluid accumulation is lower, and the reasonable production system can avoid the accumulation of liquid.
【學(xué)位授予單位】：重慶科技學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TE37

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本文編號(hào)：1357026