本文關(guān)鍵詞：輕質(zhì)油藏注空氣氧化及氧化動力學(xué)研究　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 輕質(zhì)原油 氧化機理 熱動力學(xué) 熱監(jiān)測 自燃

【摘要】：近年,在油田高壓注空氣(HPAI)技術(shù)受到世界范圍內(nèi)廣泛關(guān)注的同時,在油藏HPAI技術(shù)基礎(chǔ)理論和應(yīng)用研究上,依然存在著諸多空白與不足。在我國,油田HPAI項目實施相比于國外起步較晚,沒有系統(tǒng)的基礎(chǔ)理論研究,實踐也處于探索階段,有必要展開相關(guān)理論研究工作。 因此,為了在輕質(zhì)油藏中成功實施空氣驅(qū)項目,較好的控制輕質(zhì)油藏原油在高壓注空氣過程中的氧化自燃,本文在實驗室展開了對輕質(zhì)原油氧化及氧化動力學(xué)的研究。本文首先對國內(nèi)外輕質(zhì)油藏高壓注空氣項目的實踐情況和氧化自燃理論研究現(xiàn)狀進行了綜述,建立了實施空氣驅(qū)項目的輕質(zhì)油藏基礎(chǔ)物性范圍,分析了現(xiàn)階段對輕質(zhì)原油氧化自燃機理研究方面的薄弱環(huán)節(jié),明確了本文的研究思路和研究方法,并綜合對比篩選出了具有代表性的實驗所用輕質(zhì)油藏原油。 本次研究首先采用氧化管實驗方法,對篩選出的輕質(zhì)原油在多孔介質(zhì)中的氧化機理進行了實驗研究,分析了溫度、壓力、黏土含量和油樣等多種影響因素對原油氧化行為的影響。通過對比原油氧化前后的油相、氣相組分變化特征,深入解析了輕質(zhì)原油的耗氧機理、氧化裂解歷程和氧化前后原油的特性變化,重建了輕質(zhì)原油耗氧反應(yīng)和裂解反應(yīng)模式,同時對輕質(zhì)原油在不同油藏條件下的自燃潛力進行了分析研究。 隨后,采用熱重分析(TG)、微分熱重分析(DTG)和差熱分析(DTA)方法,對輕質(zhì)原油采用不同注入氣體,加入地層巖屑以及混入不同組分諸如飽和烷烴或膠質(zhì)時,在不同溫度區(qū)間的氧化動力學(xué)參數(shù)、吸熱或放熱程度以及質(zhì)量損失情況等信息進行了類比分析,研究了它們對原油氧化特性的影響和作用,用以評價空氣驅(qū)過程中輕質(zhì)原油氧化自燃潛力。 在上述研究的基礎(chǔ)上,通過實驗室自主研發(fā)的熱監(jiān)測儀器,對輕質(zhì)原油在不同條件下氧化過程中的溫度變化進行了跟蹤監(jiān)測。在分析了油藏溫度、原油組分、巖屑比面和黏土礦物對原油氧化升溫的影響后,研究發(fā)現(xiàn)輕原油在不同條件下氧化后都會導(dǎo)致溫度升高,升溫范圍是2-7℃。但是,在實驗室條件下沒有監(jiān)測到因為升溫導(dǎo)致的自燃的發(fā)生。 本文通過氧化管實驗和綜合熱分析的方法對原油注空氣過程中,影響原油氧化的多種影響因子進行了分析,應(yīng)用了熱監(jiān)測儀器來分析輕質(zhì)原油的氧化自燃的發(fā)生與否,在輕質(zhì)原油氧化及氧化動力學(xué)研究方面取得了一定的研究進展。這些對今后的相關(guān)研究工作和現(xiàn)場實踐應(yīng)用均有一定的參考價值和指導(dǎo)意義。
[Abstract]:In recent years, oil field high-pressure air injection HPAI) technology has been widely concerned around the world, at the same time in the reservoir HPAI technology basic theory and application research. There are still many gaps and deficiencies. In our country, the implementation of HPAI project in oil field started relatively late compared with foreign countries, there is no systematic basic theory research, and practice is also in the exploration stage. It is necessary to carry out relevant theoretical research work. Therefore, in order to successfully implement the air flooding project in light reservoirs, the oxidation spontaneous combustion of crude oil in light reservoirs during high pressure air injection is better controlled. In this paper, the oxidation and oxidation kinetics of light crude oil have been studied in laboratory. Firstly, the practice of high-pressure air injection project and the theory of oxidation spontaneous combustion in light oil reservoirs at home and abroad have been reviewed in this paper. The basic physical property range of light oil reservoir for implementing air flooding project is established, the weak links in the study of oxidation spontaneous combustion mechanism of light crude oil at present are analyzed, and the research ideas and research methods of this paper are clarified. The representative light oil reservoir used in the experiment was screened by comprehensive comparison. In this study, the oxidation mechanism of light crude oil in porous media was studied by using oxidation tube method, and the temperature and pressure were analyzed. The effects of clay content and oil sample on the oxidation behavior of crude oil were studied. The oxygen consumption mechanism of light crude oil was analyzed by comparing the oil phase and gas phase change characteristics before and after oxidation. The oxidation cracking history and the characteristic changes of crude oil before and after oxidation have reconstructed the oxygen consumption reaction and pyrolysis reaction mode of light crude oil. At the same time the spontaneous combustion potential of light crude oil under different reservoir conditions has been analyzed and studied. Then, different injected gases were used for light crude oil by using TGG, differential thermogravimetric analysis (DTG) and differential thermal analysis (DTA). When adding formation cuttings and mixing different components such as saturated alkanes or colloids, the information of oxidation kinetics, endothermic or exothermic degree and mass loss in different temperature range are analyzed by analogy. Their effects on the oxidation characteristics of crude oil were studied to evaluate the oxidation spontaneous combustion potential of light crude oil during air flooding. On the basis of the above research, the temperature change of light crude oil during oxidation under different conditions was tracked and monitored by the thermal monitoring instrument developed independently in the laboratory, and the reservoir temperature and crude oil composition were analyzed. After the effects of cuttings ratio and clay minerals on the oxidation temperature of crude oil, it is found that the oxidation of light crude oil under different conditions will lead to a rise in temperature, with a temperature range of 2-7 鈩，

本文編號：1405427