复合热载体吞吐影响因素研究

发布时间：2018-01-11 14:42

本文关键词：复合热载体吞吐影响因素研究　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：大庆萨北过渡带地区自上世纪七十年代投入开发以来,目前已进入高含水期,且由于该区块非均质性严重,依靠单纯水驱、加密调整等常规驱油技术难以从根本上改善过渡带地区的开发效果,因此针对该区块提出了运用复合热载体吞吐技术来提高采收率。复合热载体技术是根据航天技术火箭发动机的高压燃烧喷射机理,将注入的燃料(柴油或天然气)和氧化剂(空气)在燃烧室中燃烧,依靠高温高压燃气将混合掺入的水汽化而产生的,主要成分为氮气、水蒸气、二氧化碳。氮气具有很高的膨胀能,可以扩大波及范围,很好的深入到地层内部;二氧化碳主要是起到降低原油粘度、降低油气界面张力等作用;水蒸气具有很高的热焓值,也可以降低原油粘度并提高原油自身能量。将所形成的复合热载体通过油井注入油层,便可以大幅度提高原油采收率。本文在对大庆萨北过渡带自身油藏特点、区块开采现状以及对国内外应用注气提高原油采收率技术发展现状充分调研的基础上,根据现场实际要求,在模拟地层条件下,利用非均质岩心模型,进行5个周期复合热载体吞吐室内实验,把各周期测定的采收率、含水率、气油比等参数作为评价指标,分析出了地层参数中注入时机以及注采参数中注入温度、注入压力、注入量、焖井时间对复合热载体吞吐效果的影响,并确定最优参数和最佳吞吐周期。在进行注入温度、注入压力以及注入量这3个注采参数的复合热载体吞吐实验之前,对地层原油进行了高压物性实验,并分析出了注入温度、注入压力以及注入量对复合热载体吞吐开采的驱油机理。实验结果表明:复合热载体吞吐过程中当含油饱和度为77.28%时为最佳注入时机,注入温度为280℃、注入压力为20.9MPa、注入量为8.5cm3、焖井时间为150S,最佳吞吐周期为3~4个周期。
[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.

【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.7

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