【摘要】：為了滿(mǎn)足天然氣調(diào)峰、事故應(yīng)急和戰(zhàn)略?xún)?chǔ)備的需要,中國(guó)石油天然氣股份有限公司擬在長(zhǎng)慶氣田開(kāi)展儲(chǔ)氣庫(kù)群建設(shè),其中包括陜Y儲(chǔ)氣庫(kù)在內(nèi)的數(shù)座含硫氣藏儲(chǔ)氣庫(kù)。成功建設(shè)此類(lèi)含硫氣儲(chǔ)氣庫(kù)需要合適的含硫氣藏儲(chǔ)氣庫(kù)注采工藝,而目前國(guó)內(nèi)外尚無(wú)成熟的含硫氣藏型儲(chǔ)氣庫(kù)工藝技術(shù)可以借鑒。因此,先期開(kāi)展陜Y含硫氣藏儲(chǔ)氣庫(kù)地面注采工藝的研究尤為重要。本文通過(guò)分析陜Y儲(chǔ)氣庫(kù)地面注采工藝主要完成以下幾點(diǎn)研究?jī)?nèi)容:(1)陜Y儲(chǔ)氣庫(kù)注入氣源是產(chǎn)品氣,不含雜質(zhì),而采出氣為含有H2S、CO2的未凈化天然氣,同時(shí)注采過(guò)程工況有很大不同。本文對(duì)此創(chuàng)新性的提出了注采雙管、注采氣井雙向計(jì)量的工藝,簡(jiǎn)化了注采工藝流程,降低了工程投資。(2)在已知地層的破裂壓力的情況下,通過(guò)利用氣藏工程方法對(duì)注氣系統(tǒng)壓力節(jié)點(diǎn)分析,反推出注氣井口壓力。結(jié)合儲(chǔ)氣庫(kù)壓力運(yùn)行范圍和地面配套設(shè)備及管網(wǎng)設(shè)計(jì)能力進(jìn)行綜合考慮,得到了儲(chǔ)氣庫(kù)合理的注氣壓力。(3)通過(guò)分析陜Y儲(chǔ)氣庫(kù)采氣系統(tǒng)節(jié)點(diǎn)壓力的變化,以及水合物生成的條件的預(yù)測(cè),提出了水平井兩級(jí)降壓,開(kāi)工移動(dòng)注醇,中高壓采氣,加熱節(jié)流,三甘醇脫水的地面工藝模式。(4)針對(duì)含硫氣藏儲(chǔ)氣庫(kù)H2S和CO2等氣體組分,在注采周期的變化規(guī)律進(jìn)行了研究總結(jié),提出了出了適合陜Y儲(chǔ)氣庫(kù)的脫硫脫碳工藝。(5)經(jīng)過(guò)對(duì)儲(chǔ)氣庫(kù)壓縮機(jī)周期性強(qiáng)采強(qiáng)注、工況變化大、適應(yīng)能力強(qiáng)的工作特點(diǎn)的分析,選擇了適合陜Y儲(chǔ)氣庫(kù)的壓縮機(jī)配置方案,同時(shí)對(duì)壓縮機(jī)工況進(jìn)行了校核。陜Y儲(chǔ)氣庫(kù)注采工藝的研究總結(jié)為長(zhǎng)慶氣田以及國(guó)內(nèi)以后大規(guī)模酸性氣藏儲(chǔ)氣庫(kù)的建設(shè)提供了重要經(jīng)驗(yàn)與技術(shù)支持。
[Abstract]:In order to meet the needs of natural gas peak shaving, accident emergency and strategic reserve, CNPC plans to build a gas storage group in Changqing gas field, including several sulfur-bearing gas reservoirs including Shaanxi Y gas reservoir. The successful construction of this kind of sulfur-bearing gas storage requires an appropriate injection and production process of the sulfur-bearing gas reservoir, but at present there is no mature sulfur-containing gas reservoir technology at home and abroad to be used for reference. Therefore, it is very important to study the surface injection and production technology of Shaanxi Y sour gas reservoir in advance. In this paper, the main research contents are as follows: (1) the injected gas source of Shaanxi Y gas storage reservoir is product gas without impurity, while the produced gas is unpurified natural gas containing H _ 2S _ 2 and CO _ 2, the main research contents of this paper are as follows: (1) the injected gas source of Shaanxi Y gas storage reservoir is product gas without impurity. At the same time, the working conditions of injection-mining process are very different. In this paper, the technology of dual pipe injection and gas injection and bidirectional measurement of gas injection well is put forward, which simplifies the injection and production process and reduces the project investment. (2) under the condition of known formation fracture pressure, By using gas reservoir engineering method, the pressure node of gas injection system is analyzed and the wellhead pressure of gas injection system is deduced. The reasonable gas injection pressure is obtained by considering the operation range of gas storage reservoir and the design ability of ground supporting equipment and pipe network. (3) the change of node pressure of gas production system in Shaanxi Y gas storage reservoir is analyzed. As well as the prediction of hydrate formation conditions, this paper puts forward the surface process model of two-stage depressurization, starting to move alcohol injection, medium-high pressure gas recovery, heating throttling, and dehydration of triethylene glycol in horizontal wells. (4) aiming at the gas components such as H _ 2S and CO2 in sulfur-containing gas reservoirs, The variation law of injection-production cycle is studied and summarized, and the desulphurization and decarburization process suitable for Shaanxi Y gas storage reservoir is put forward. (5) through the analysis of the working characteristics of gas storage compressor with periodic strong production and strong injection, the working conditions change greatly and the adaptability is strong. The compressor configuration scheme suitable for Shaanxi Y gas storage is selected, and the compressor condition is checked at the same time. The research on injection and production technology of Shaanxi Y gas storage reservoir provides important experience and technical support for the construction of Changqing gas field and large scale acid gas reservoir in China.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TE972

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