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王敉邦,杨胜来,郑祖号,等. 基于激光法的含气高含蜡原油溶蜡规律[J]. 科学技术与工程, 2019, 19(36): 134-139.
Wang Mibang,et al.Study on the Law of Wax Dissolution in Crude Oil with High Waxy[J].Science Technology and Engineering,2019,19(36):134-139.
基于激光法的含气高含蜡原油溶蜡规律
Study on the Law of Wax Dissolution in Crude Oil with High Waxy
投稿时间:2019-03-08  修订日期:2019-12-25
DOI:
中文关键词:  高含蜡原油 溶蜡规律 显微观测法 激光法 含气原油
英文关键词:High waxy crude oil Wax dissolution law Microscopic observation method Laser method Live oil
基金项目:国家科技重大专项(2016ZX05016006-003)、中国石油天然气股份有限公司重大科技专项“辽河油田千万吨稳产关键技术研究与应用”(2017E-16)
                 
作者单位
王敉邦 中国石油大学(北京)
杨胜来 中国石油大学(北京)
郑祖号 中国石油大学(北京)
于 涛 中国石油辽河油田公司勘探开发研究院
杨 灿 中国石油辽河油田公司勘探开发研究院
王鸿博 中国石油管道局工程有限公司
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中文摘要:
      为获得高含蜡原油溶蜡规律,同时进一步探索含气原油溶蜡特征,采用了显微观测法和激光法进行实验。首先通过显微观测法获得了升温过程中蜡晶变化特征;其次采用激光法对脱气原油进行了测试并与显微观测法进行对比联系,验证了激光法的可靠性;最后采用基于Beer-Lambert定律的激光衰减曲线获得了含气原油溶蜡点以及升温过程中蜡含量、平均等积圆平均直径和颗粒宽度系数等参数的变化特征。实验结果表明:脱气原油蜡晶升温溶解过程以凝固点为界可划分为慢速和快速两个溶解阶段;原油溶蜡特征与不同碳数的正链烷烃熔点有着密切联系,质量累积计分数曲线上97%所对应的烷烃熔点接近或高于实测原油溶蜡点,质量累积计分数曲线相近的原油溶蜡点相同;含气原油凝固点比地面条件下脱气原油低约7℃,溶蜡点低约2.5℃,并且凝固点后含蜡量以平均0.15%/℃的快速下降,后稳定在0.076~0.087%/℃。该研究可以预估和评价不同温度、压力下原油粘度以及清蜡速率,避免保守设计带来的经济损失。
英文摘要:
      In order to obtain the law of wax dissolution in high waxy crude oil and further explore the characteristics of wax dissolution in live oil, microscopic observation method and laser method were used to carry out experiments. Firstly, the characteristics of wax crystal change during heating process are obtained by microscopic observation method; secondly, the laser method is used to test dead oil and compare with microscopic observation method to verify the reliability of laser method; finally, the wax melt point of live oil and the average wax content, average equal area circle diameter and the particle width coefficient during heating process are obtained by laser attenuation curve based on Beer-Lambert law. The experimental results show that the dissolution process of wax crystals in dead oil can be divided into slow and fast dissolution stages. The characteristics of wax melting are closely related to the melt point of n-alkanes with different carbon numbers, and the melt point of 97% paraffins corresponding to the cumulative mass fraction curve is close or higher to the measured melt point of crude oil. The wax dissolving point of crude oil with similar mass accumulative fraction curve is the same. The pour point of live oil is about 7 C lower than that of dead oil, the wax melt point is about 2.5 C lower. The wax content after pour point decreases rapidly with an average of 0.15%/℃, and then stabilizes at 0.076-0.087%/℃. This study can predict and evaluate the crude oil viscosity and wax dissolve rate at different temperatures and pressures, and avoid the economic losses caused by conservative design.
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