本文選題：凝析氣藏 + 提高采收率�。� 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：凝析氣田因其可觀的儲(chǔ)量和極高的經(jīng)濟(jì)價(jià)值,在我國(guó)乃至世界氣田開(kāi)發(fā)中占有重要地位。而目前我國(guó)相當(dāng)部分凝析氣田已進(jìn)入開(kāi)發(fā)中后期且大多由于嚴(yán)重的反凝析污染而處于低產(chǎn)低效狀態(tài),因此探索凝析氣藏開(kāi)發(fā)中后期如何提高凝析油采收率對(duì)凝析氣藏開(kāi)發(fā)具有非常重要意義。本論文在中石油“凝析氣藏開(kāi)發(fā)中后期提高采收率機(jī)理及技術(shù)可行性”項(xiàng)目的資助下開(kāi)展實(shí)驗(yàn)研究,對(duì)指導(dǎo)凝析氣藏合理高效開(kāi)發(fā)具有重要意義。 丘東凝析氣藏屬于中等凝析油含量的低滲氣藏。開(kāi)發(fā)進(jìn)入中后期,凝析油和天然氣采收率較低。本文通過(guò)在室內(nèi)配制有地層代表性的流體并開(kāi)展凝析氣體系注氣膨脹實(shí)驗(yàn),研究不同注入介質(zhì)、不同注入壓力條件下對(duì)反凝析液的抽提規(guī)律。在此基礎(chǔ)上采用實(shí)際儲(chǔ)層巖心,在室內(nèi)開(kāi)展長(zhǎng)巖心驅(qū)替實(shí)驗(yàn)?zāi)M凝析氣藏開(kāi)發(fā)中后期不同注入流體、不同注氣方式條件下提高凝析油采出程度的差異以及儲(chǔ)層層間物性差異對(duì)注氣效果的影響,并結(jié)合實(shí)際優(yōu)選出合適注入流體和注氣方式,同時(shí)定量評(píng)價(jià)了層間干擾對(duì)注氣效果的影響。本文主要取得了以下結(jié)論與認(rèn)識(shí)： (1)注氣膨脹實(shí)驗(yàn)結(jié)果表明：目前地層壓力下,CO2對(duì)反凝析液的抽提能力最強(qiáng)、其次為干氣,N2最弱;注氣壓力越高,對(duì)反凝析液抽提能力越強(qiáng)。 (2)不同注入流體長(zhǎng)巖心實(shí)驗(yàn)表明：目前地層壓力下注干氣驅(qū)凝析油累計(jì)采收率可達(dá)到38.68%,且總注入量較少(2.6HCPV),故考慮干氣為補(bǔ)充地層能量的首選介質(zhì)。 (3)不同注氣方式長(zhǎng)巖心實(shí)驗(yàn)表明：目前地層壓力下脈沖注氣凝析油采出程度達(dá)到64.96%,但注入量高達(dá)4.51HCPV;其次是連續(xù)氣驅(qū),凝析油采出程度達(dá)到38.68%,注入量2.04HCPV。故針對(duì)丘東凝析氣田,建議首先選擇連續(xù)氣驅(qū)開(kāi)發(fā)方式,氣量充足的情況下可選擇脈沖注氣。 (4)層間干擾實(shí)驗(yàn)結(jié)果表明：籠統(tǒng)注氣時(shí),高滲層凝析油采出程度增加迅速且大于低滲層。與分層注氣比較,相同注氣速度下注入相同體積氣量1.48HCPV時(shí),籠統(tǒng)注氣比分層注氣凝析油采出程度低5.77%。
[Abstract]:Condensate gas field plays an important role in gas field development in China and the world because of its considerable reserves and high economic value. However, at present, quite a part of condensate gas fields in China have entered the middle and late stage of development, and most of them are in a state of low productivity and low efficiency due to serious retrograde condensate pollution. Therefore, it is very important to explore how to improve condensate oil recovery in the middle and late stage of development of condensate gas reservoir. This paper is of great significance to guide the rational and efficient development of condensate gas reservoir with the support of PetroChina project "improving recovery mechanism and technical feasibility in the middle and late stage of development of condensate gas reservoir". Qiudong condensate gas reservoir belongs to low permeability gas reservoir with medium condensate content. The recovery of condensate oil and natural gas is low in the middle and late stage of development. In this paper, the extraction law of reverse condensate was studied under different injection medium and different injection pressure through the preparation of stratigraphic representative fluid and the gas injection expansion experiment of condensate gas system. On this basis, the actual reservoir core is used to simulate the different injection fluid in the middle and late stage of condensate gas reservoir development by using long core displacement experiment in laboratory. The effects of different gas injection modes on the gas injection effect are discussed, and the suitable injection fluid and gas injection mode are selected according to the different gas injection modes, as well as the effect of reservoir physical property difference on the gas injection effect. At the same time, the effect of interlayer interference on gas injection effect was evaluated quantitatively. In this paper, the following conclusions and understandings are obtained: 1) the results of gas injection expansion test show that CO _ 2 has the strongest extraction ability to reverse condensate at present, followed by the weakest dry gas N _ 2, and the higher the gas injection pressure, the stronger the extraction ability of reverse condensate. 2) the long core experiments of different injected fluids show that the cumulative recovery factor of condensate oil driven by dry gas flooding can reach 38.68 at present, and the total injection quantity is less than 2.6 HCPVN, so the dry gas is considered as the preferred medium to replenish the formation energy. 3) long core experiments of different gas injection modes show that the recovery degree of condensate oil by pulsed gas injection is 64.96 at present, but the injection rate is as high as 4.51 HCPV.The second is continuous gas drive, the recovery degree of condensate oil is 38.68 and the injection quantity is 2.04HCPV. Therefore, for Qiudong condensate gas field, it is suggested that continuous gas drive should be selected first, and pulse gas injection should be selected when gas quantity is sufficient. The experimental results of interlaminar interference show that the recovery degree of condensate oil in high permeability layer increases rapidly and is larger than that in low permeability layer under general gas injection. Compared with stratified gas injection, the recovery degree of general gas injection is 5.77% lower than that of stratified gas injection condensate oil under the same gas injection velocity and same volume gas volume 1.48HCPV.
【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)】：TE372

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張大椿;周理志;袁學(xué)芳;熊新明;劉舉;李遠(yuǎn)亮;;凝析氣藏的液相傷害與防治[J];斷塊油氣田;2008年04期

2 肖麗仙;杜建芬;郭平;楊素云;曾珠;;凝析氣藏反凝析污染研究[J];斷塊油氣田;2009年04期

3 劉廷元;凝析氣藏的經(jīng)濟(jì)開(kāi)采模式[J];中國(guó)工程科學(xué);2001年03期

4 呂棟梁;唐海;李勝杰;范啟東;;CO_2解除低滲氣藏反凝析液傷害研究[J];海洋石油;2007年03期

5 湯勇;孫雷;杜志敏;孫良田;李士倫;;注干氣吞吐提高凝析氣井產(chǎn)能研究[J];石油天然氣學(xué)報(bào)(江漢石油學(xué)院學(xué)報(bào));2006年05期

6 楊愛(ài)珍;凝析氣藏注水提高采收率技術(shù)[J];內(nèi)蒙古石油化工;2005年05期

7 王淵;何志雄;李嘉瑞;李成福;李閩;;低滲氣藏多層合采層間干擾系數(shù)的確定[J];科學(xué)技術(shù)與工程;2012年34期

8 常愛(ài)萍;王瑞杰;周延芳;劉新嶺;朱永忠;朱慶林;;脈沖排液法在低壓氣井的應(yīng)用[J];內(nèi)蒙古石油化工;2011年12期

9 劉玉慧,袁士義,宋文杰,李保柱,王金勛;反凝析液對(duì)產(chǎn)能的影響機(jī)理研究[J];石油勘探與開(kāi)發(fā);2001年01期

10 郭平;鄧壘;楊學(xué)峰;唐明龍;肖香姣;呂江毅;;低滲富含凝析油凝析氣藏氣井干氣吞吐效果評(píng)價(jià)[J];石油勘探與開(kāi)發(fā);2010年03期

，

本文編號(hào)：1826490