【摘要】：近年來(lái),水平井逐漸成為氣藏開發(fā)的主要手段,特別是隨著低滲透氣藏在我國(guó)天然氣儲(chǔ)量比例中的上升,使用水平井成為開發(fā)低滲氣藏最有效的手段。但也由于其使用于氣藏時(shí)間不長(zhǎng)、特別是低滲氣藏的使用,使得對(duì)水平井生產(chǎn)、氣藏滲流等理論研究都還不完善。因此對(duì)于氣藏水平井產(chǎn)能、生產(chǎn)系統(tǒng)分析及配產(chǎn)研究具有重要意義。 本文主要通過(guò)大量文獻(xiàn)建立考慮啟動(dòng)壓力的氣藏水平井二項(xiàng)式產(chǎn)：能方程,分析啟動(dòng)壓力梯度、表皮系數(shù)、水平井長(zhǎng)度、氣藏厚度、氣藏各向異性對(duì)水平井產(chǎn)能影響,其次以水平井根端為節(jié)點(diǎn),對(duì)水平井系統(tǒng)進(jìn)行節(jié)點(diǎn)分析,分析了井口壓力、地層壓力、表皮系數(shù)、油管內(nèi)徑等對(duì)氣井生產(chǎn)過(guò)程的影響,得出隨著表皮系數(shù)降低,氣井產(chǎn)能加速上升,通過(guò)節(jié)點(diǎn)分析油管內(nèi)徑,內(nèi)徑越大,產(chǎn)量越高,但增加幅度逐漸放緩。通過(guò)建立氣藏滲流與水平井筒管流耦合模型,分析水平段井筒壓力及產(chǎn)量隨位置變化關(guān)系,得出隨著水平段長(zhǎng)度增加,水平段壓降對(duì)水平井產(chǎn)量影響增加,相對(duì)于生產(chǎn)壓差,影響很小。并通過(guò)建立直井段、傾斜段、水平段臨界攜液模型,針對(duì)直井段和傾斜段分別考慮高氣液比、低氣液比條件氣井的臨界攜液狀態(tài),計(jì)算臨界攜液流量,得出隨著產(chǎn)水量增加,低氣液比臨界攜液流量要明顯大于高臨界攜液流量。最后采用節(jié)點(diǎn)分析法、臨界攜液流量法、采氣指數(shù)法、經(jīng)驗(yàn)法分析氣井配產(chǎn),得出節(jié)點(diǎn)分析法為氣井最高配產(chǎn)制度,而臨界攜液為保證氣井正常生產(chǎn)的最低配產(chǎn)。最后通過(guò)物質(zhì)能量平衡法對(duì)水平井進(jìn)行單井儲(chǔ)量及穩(wěn)產(chǎn)末期壓力分析和穩(wěn)產(chǎn)年限分析,為氣藏開發(fā)提供有效理論依據(jù),通過(guò)編制水平氣井合理工作制度軟件,軟件整體按照論文思路對(duì)水平井進(jìn)行產(chǎn)能分析、生產(chǎn)動(dòng)態(tài)分析、配產(chǎn)分析及穩(wěn)產(chǎn)能力研究,對(duì)實(shí)際水平氣井配產(chǎn)、生產(chǎn)系統(tǒng)分析具有重要的指導(dǎo)作用。
[Abstract]:In recent years, horizontal wells have gradually become the main means of gas reservoir development, especially with the increase of low permeability gas reservoirs in the proportion of natural gas reserves in China, the use of horizontal wells has become the most effective means to develop low permeability gas reservoirs. However, due to its use in gas reservoirs for a short time, especially the use of low permeability gas reservoirs, the production of horizontal wells, gas reservoir percolation and other theoretical studies are not perfect. Therefore, the analysis of production system and the study of production distribution are of great significance for horizontal well productivity of gas reservoir. In this paper, the binomial energy equation of gas reservoir horizontal well considering start-up pressure is established through a large number of literatures. The effects of starting pressure gradient, skin coefficient, horizontal well length, gas reservoir thickness and gas reservoir anisotropy on horizontal well productivity are analyzed. Secondly, taking the root end of horizontal well as the node, the joint analysis of horizontal well system is carried out, and the influence of wellhead pressure, formation pressure, skin coefficient, inner diameter of tubing on the production process of gas well is analyzed, and it is concluded that with the decrease of skin coefficient, The productivity of gas well increases rapidly. The larger the inner diameter of the tubing is, the higher the production is, but the increasing range is slowing down gradually through the nodal analysis of the inner diameter of the tubing. By establishing the coupling model of gas reservoir percolation and horizontal well bobbin flow, the relationship between wellbore pressure and production rate with the position of horizontal section is analyzed. It is concluded that with the increase of horizontal section length, the influence of horizontal section pressure drop on horizontal well output increases, relative to the production pressure difference. The impact is small. By establishing the critical liquid carrying model of vertical well section, inclined section and horizontal section, considering the critical liquid carrying state of gas well with high gas-liquid ratio and low gas-liquid ratio, the critical liquid carrying rate is calculated, and the results show that the critical liquid carrying rate increases with the increase of water production. The critical liquid carrying rate of low gas liquid is obviously larger than that of high critical liquid carrying rate. Finally, the nodal analysis method, critical liquid carrying rate method, gas recovery index method and empirical method are used to analyze the gas well production. It is concluded that the nodal analysis method is the maximum production system of the gas well, and the critical liquid carrying method is the minimum production rate to ensure the normal production of the gas well. Finally, through the method of material and energy balance, the single well reserves, the pressure analysis at the end of the stable production period and the stable production life analysis are carried out for horizontal wells, which provides an effective theoretical basis for gas reservoir development, and through compiling the reasonable working system software for horizontal gas wells, According to the idea of the paper, the software has an important guiding role in productivity analysis, production dynamic analysis, production distribution analysis and stable production ability research for horizontal gas well distribution and production system analysis.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE37

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 易俊,徐春碧,張其敏,唐洪俊,石永新,王南偉,蔣長(zhǎng)春;氣井動(dòng)態(tài)分析系統(tǒng)[J];重慶石油高等專科學(xué)校學(xué)報(bào);2001年04期

2 赫恩杰,張麗華,吳江輝;凝析氣井動(dòng)態(tài)分析方法及應(yīng)用[J];斷塊油氣田;1996年04期

3 朱德武,鄭曉志,陳雷;凝析氣井垂直管流計(jì)算新方法[J];斷塊油氣田;1999年01期

4 王毅忠;劉慶文;;計(jì)算氣井最小攜液臨界流量的新方法[J];大慶石油地質(zhì)與開發(fā);2007年06期

5 周慶軍,戴慶,馬華麗;油井節(jié)點(diǎn)分析方法在生產(chǎn)實(shí)際中的應(yīng)用[J];國(guó)外油田工程;2002年11期

6 劉想平;底水驅(qū)油藏水平井三維穩(wěn)態(tài)解產(chǎn)能公式[J];江漢石油學(xué)院學(xué)報(bào);1998年01期

7 李培,韓大匡,李凡華,張盛宗;水平井無(wú)限井排產(chǎn)能公式──Muskat公式的推廣[J];石油勘探與開發(fā);1997年03期

8 范子菲;裂縫性氣藏水平井穩(wěn)態(tài)解公式研究[J];石油勘探與開發(fā);1997年05期

9 李閩,郭平,譚光天;氣井?dāng)y液新觀點(diǎn)[J];石油勘探與開發(fā);2001年05期

10 吳志均,何順利;低氣液比攜液臨界流量的確定方法[J];石油勘探與開發(fā);2004年04期

，

本文編號(hào)：2195527