本文關鍵詞：復合熱載體吞吐影響因素研究　出處：《東北石油大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 大慶薩北過渡帶 復合熱載體吞吐 地層參數(shù) 注采參數(shù) 室內實驗

【摘要】：大慶薩北過渡帶地區(qū)自上世紀七十年代投入開發(fā)以來,目前已進入高含水期,且由于該區(qū)塊非均質性嚴重,依靠單純水驅、加密調整等常規(guī)驅油技術難以從根本上改善過渡帶地區(qū)的開發(fā)效果,因此針對該區(qū)塊提出了運用復合熱載體吞吐技術來提高采收率。復合熱載體技術是根據(jù)航天技術火箭發(fā)動機的高壓燃燒噴射機理,將注入的燃料(柴油或天然氣)和氧化劑(空氣)在燃燒室中燃燒,依靠高溫高壓燃氣將混合摻入的水汽化而產生的,主要成分為氮氣、水蒸氣、二氧化碳。氮氣具有很高的膨脹能,可以擴大波及范圍,很好的深入到地層內部;二氧化碳主要是起到降低原油粘度、降低油氣界面張力等作用;水蒸氣具有很高的熱焓值,也可以降低原油粘度并提高原油自身能量。將所形成的復合熱載體通過油井注入油層,便可以大幅度提高原油采收率。本文在對大慶薩北過渡帶自身油藏特點、區(qū)塊開采現(xiàn)狀以及對國內外應用注氣提高原油采收率技術發(fā)展現(xiàn)狀充分調研的基礎上,根據(jù)現(xiàn)場實際要求,在模擬地層條件下,利用非均質巖心模型,進行5個周期復合熱載體吞吐室內實驗,把各周期測定的采收率、含水率、氣油比等參數(shù)作為評價指標,分析出了地層參數(shù)中注入時機以及注采參數(shù)中注入溫度、注入壓力、注入量、燜井時間對復合熱載體吞吐效果的影響,并確定最優(yōu)參數(shù)和最佳吞吐周期。在進行注入溫度、注入壓力以及注入量這3個注采參數(shù)的復合熱載體吞吐實驗之前,對地層原油進行了高壓物性實驗,并分析出了注入溫度、注入壓力以及注入量對復合熱載體吞吐開采的驅油機理。實驗結果表明:復合熱載體吞吐過程中當含油飽和度為77.28%時為最佳注入時機,注入溫度為280℃、注入壓力為20.9MPa、注入量為8.5cm3、燜井時間為150S,最佳吞吐周期為3~4個周期。
[Abstract]:Daqing Sabei transitional zone in 70s has been in development since the last century, has entered the high water cut period, and because the block heterogeneity is serious, rely on water flooding, infilling conventional flooding technology is difficult to fundamentally improve the development effect of the transitional zone, because of this the block made use of composite heat carrier handling technology to enhance oil recovery. The composite heat carrier technology is based on the space technology of high-pressure combustion rocket engine jet fuel injection mechanism (diesel or gas) and oxidant (air) combustion in the combustion chamber, rely on high temperature and high pressure gas mixing water vaporization incorporation and nitrogen as the main component water vapor, carbon dioxide, nitrogen. With expansion energy is very high, can expand the scope, good depth to the formation of internal; carbon dioxide is mainly to reduce oil viscosity, reduce the oil and gas interface Tension effect; water vapor enthalpy has a very high value, but also can reduce the viscosity of crude oil and improve oil reservoir. Its energy into the composite heat carrier formed by the oil well, it can greatly improve the recovery of crude oil. In Daqing Sabei transition zone its reservoir characteristics, current situation and exploitation of the block the domestic and foreign application of gas injection EOR technology development status of the full investigation, according to the actual requirements in the simulated reservoir conditions, using heterogeneous core model, 5 periodic composite heat carrier huff and puff experiment, the recovery rate of each period, the determination of water content, gas oil ratio as evaluation parameter index, analysis of the formation parameters in injection temperature, injection time and injection production parameters of injection pressure, injection rate, effect of soaking time on composite heat carrier stimulation effect, and determine the optimal parameters and the best The throughput cycle. In injection temperature, injection pressure and injection volume of composite heat carrier recovery tests of the 3 injection production parameters before the PVT experiment of crude oil, and the analysis of the injection temperature, injection pressure and injection rate of composite heat carrier stimulation of the flooding mechanism. The experimental results show that: composite heat carrier stimulation process when oil saturation is 77.28% for the best injection time, injection temperature is 280 DEG C, the injection pressure is 20.9MPa, the injection volume is 8.5cm3, soaking time was 150S, the optimal throughput cycle for 3~4 cycles.

【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE357.7

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本文編號：1409988