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根据辽河油区15个油田77个地面原油分析和高压物性分析数据,运用数理统计学原理,建立了计算地层原油粘度经验方程,由此可采用地面脱气原油粘度计算稀油在地层条件下的原油粘度,平均绝对误差为1.50mPa.s。该方程可为流体评价和油藏开发提供可靠的地层原油粘度资料。 相似文献
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确定地层原油粘度的经验方法 总被引:3,自引:2,他引:3
辽河油区每年都有相当规模的新增储量和新建产能区块,需要进行储量评价和开发前期方案的编制,进行油藏工程计算和油藏研究。但辽河油区的断块油气田具有含油层系多、断块多、油品多和油藏类型复杂、规模小的特点,使得获取各油藏地层条件下的高压物性资料难度很大,有些单元往往缺少实测的地层条件下的高压物性资料。因而在确定地层原油粘度时没有足够的实测地层条件下高压物性资料,不能满足实际生产需要。依据原油粘度的影响因素,结合地层原油粘度与地面原油物性之间的联系,对辽河油区稀油、稠油两种油品54 个已开发单元的原油物性进行分析研究,建立了地层原油粘度与地面原油物性间的相关经验公式。新增储量单元只要获得易取的地面原油物性分析资料,就可利用本区( 油田) 公式很方便地求出地层原油粘度值。文章还对该方法的准确性进行了误差分析,指出了实际应用过程中以不同油田为单元建立相关经验公式效果会更好,相对误差基本在0.6% ~20% 。图1 表1 参4( 苏继红摘) 相似文献
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气测录井能及时发现油气显示,定性识别油气水层,预报井涌、井喷和气侵,是油气发现及储层流体判别的重要方法,但利用其与测井资料综合识别储层流体黏度的研究较少。通过对L油田钻井过程中大量油层的气测录井组分比值与原油API°相关性研究,回归建立预测原油API°的经验公式,避免了气测测量误差和单位不统一的问题。同时,利用本区已有的原油API°与原油黏度关系式,可快速预测油层地面原油密度和地层原油黏度,方法简洁、实用,不仅可节约化验分析费用,还能为射孔生产等快速决策提供依据。 相似文献
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加拿大拥有巨大的稠油和沥青质原油油藏,成功开采这类原油,黏度测量是关键.低磁场核磁共振(NMR)作为测量这一性质的工具显示出巨大的潜力,以前研究的NMR黏度关系对大范围黏度和温度数量级评价是有效的.利用NMR光谱与黏度关系实验,建立起现象学关系式,更详尽地研究了原油黏度和NMR,为提出的关系式提供了理论证明.还介绍了一种新型调谐方法,通过该方法使应用Arrhenius(阿列纽斯)公式的关系式可以改善多种温度下单一原油的NMR黏度评价.调谐使NMR可用于研究监测热力采油井或在线监测产出液蒸气冷却后黏度. 相似文献
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原油密度、黏度的地化热解评价方法 总被引:4,自引:1,他引:4
地化热解资料不同组分所影响因素不同,这些影响因素外在表现和机理不同,从影响机理入手,在对各组分进行样重、孔隙与体积校正的基础上,分别建立原油密度约束的轻、中及重质组分校正模型。对不同来源的地化热解资料进行校正后,在考虑残余烃含量的同时,提取与原油密度、黏度相关性较大的评价参数,建立原油密度、黏度相关性较大的评价参数,建立原油密度、黏度的多参数相关性定量化评价模型。并形成了一套较为完善的资料校正与原油密度、黏度评价方法,对不同储集层、层位、原油性质的37口井共48层的原油密度、黏度进行评价,评价结果与原油样品分析结果对比可知,其精度有了明显提高。 相似文献
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E.J. Suárez-Domínguez J.F. Pérez-Sánchez A. Palacio-Pérez A. Rodríguez-Valdes E. Izquierdo-Kulich S. González-Santana 《Petroleum Science and Technology》2018,36(2):166-172
Considering that high viscosity of extra-heavy crudes is related to the formation of a dispersed phase of asphaltenes, a dynamic interaction model is proposed which explains the mechanism to achieve viscosity reduction based on the molecular interacting energies between the ester active principle of a viscosity bio-reducer and the asphaltene fraction of crude oil. A qualitative comparison is made between the theoretical and experimental results observed in relation to the rheological behavior of Mexican extra-heavy crudes in the presence of the enhancer. Both, theoretical and experimental data, described a decrease in the asphaltenes dispersed fraction in relation to the ester concentration mainly because of polarity in asphaltenic crudes. 相似文献
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对俄罗斯瓦涅干油田原油性质、实沸点蒸馏组份切割进行了详细评价,并针对其特点,提出了在加工过程中的相应对策。 相似文献
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The steady shear viscosity of a Shengli waxy crude oil at the temperature of 3°C to 4°C, higher than its gel point, was measured by using a parallel-plate rheometer, which shows a shear thickening behavior in the shear rate range of 10?2–10?1 s?1. A spectrum model proposed in our previous work was modified here by considering the modulus change in the spectra, which could be caused by a shear-induced varying internal structure in the crude oil. The shear strengthening viscosity of the Shengli crude oil can be described well by the changing-spectrum viscosity model. 相似文献
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针对常规方法只能测量地面脱气油的析蜡点,不能测量高压含气条件(油藏条件)下含蜡原油析蜡点的不足,提出了以Arrhenius方程为理论基础,利用高压毛细管黏度计测量高压含气条件下含蜡原油析蜡点的方法。实验结果表明,实验油样地面脱气后析蜡点为63.74℃,油藏条件下析蜡点为59.73℃,含蜡原油地面脱气后更容易析蜡。建议采用油藏条件下的析蜡点作为注水设计参数。 相似文献
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稠油油藏常规注水开发主要面临原油黏度高、储层非均质性强、采收率低等问题。以孤岛油田东区南15-5#站普通稠油油藏化学驱效果为基础,针对胜利油区不同原油黏度油藏条件,与矿场实际动态相结合,建立了化学驱油藏数值模拟模型;通过收集不同原油黏度油藏的高压物性、相渗曲线等开发试验数据,研究不同原油黏度对水驱、化学驱开发效果及注采能力的影响;考虑提高采收率和经济性两方面指标,初步确定适合化学驱的稠油油藏的地下原油黏度界限为500 mPa·s。在合适原油黏度条件下,应用化学驱技术可以提高稠油油藏原油采收率。 相似文献
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Shivanjali Sharma Vikas Mahto Virender Parkash Sharma Amit Saxena 《Petroleum Science and Technology》2016,34(6):523-530
Non-Newtonian fluids are the most complex ones when it comes to predicting their flow behavior. In the pre-existing models, rheological behavior in waxy crude oils is mainly affected by shear rate and thermal history of crude oils. In the present work, rheological characteristics of four different crude oils were studied by coaxial cylindrical rheometer at three different temperatures (40°C, 50°C, and 60°C) and a model was proposed keeping into consideration wax content for the first time. This model is prepared to predict the viscosity of four different crude oils with different wax content and at different temperature. The proposed model can efficiently estimate the viscosity as compared to other established models. 相似文献
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海上油田主电站原油发动机调试用燃油选择方法 总被引:1,自引:0,他引:1
基于西江23-1油田开发工程实践,总结出了海上油田主电站原油发动机调试用燃油选择方法。西江23-1油田原油发动机调试结果表明,所选重油运动粘度、密度、CCAI(计算碳芳香性指数)值、水含量、残炭含量等特性参数与原油发动机的运行状态指数对应良好,也验证了调试用燃油选择及选择方法的正确性。所介绍方法可为海上相关工程技术人员对原油发动机进行调试、使用和维护提供方便,也可为船舶主推动力重油发动机、电站重油发动机工程技术人员在燃油使用选择上提供参考。 相似文献
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To reduce the viscosity of viscous crude oil and flow resistance, the effect of a ternary compound system including organic alkali, n-alkanol, and nonionic surfactants on viscous crude oil viscosity reduction was studied. The results showed that n-alkanol effectively reduced the droplet size of an emulsion and the viscosity of viscous crude oil and improved the fluidity of viscous crude oil. Of the low-carbon n-alkanols, n-pentanol has the best viscosity-reducing effect. The organic alkali avoids the phenomenon of fouling and corrosion caused by inorganic alkali and reacts with the acidic macromolecular components in viscous crude oil to generate alkanolamides, which produce synergistic effects with nonionic surfactants and reduce the interfacial tension between oil and water. In the ternary compound of organic alkali, n-alkanol, and nonionic surfactant, the viscosity reduction effect of viscous crude oil is significantly enhanced compared with that of a single reagent. The viscosity reduction rate of viscous crude oil of the diethanolamine ternary compound system reached 98.1% and was the best choice by experimental validation. It is shown that a reasonable formula of compound system and dosage can significantly reduce the viscosity of viscous crude oil. 相似文献