日东原油管道高黏油掺混输送工艺

日东原油管道通过使用静态掺混装置实现了高黏油的在线掺混输送,并积累了大量的生产数据和经验。介绍了日东原油管道的掺混工艺、输送油品的物性、掺混界面的移动对运行参数的影响及油品静置对启输的影响。以黏度异常事件为例,对比分析了事件前后管道流量、压力、黏度及水力坡降等重要参数和数据,最终确定高稠油掺入比和部分管段沉积的杂质颗粒黏团为两个关键影响因素。为确保管道的运行安全,避免再次发生黏度异常事件,建议结合生产实际情况,以取样数据为依据,严格控制掺混比例和黏度等运行参数,明确清管频次,进一步优化管道生产运行。研究成果可为管道安全输送掺混油提供技术支持。

Mixed transportation technology of high-viscosity oil in the Rizhao-Dongming crude oil pipeline

The online mixed transportation of high-viscosity oil in the Rizhao-Dongming crude oil pipeline is realized by the static mixer, and a great amount of production data and experience is accumulated. In this paper, the effects of the mixed transportation technology adopted in the Rizhao-Dongming crude oil pipeline, the properties of transported oil and the movement of batching interface on the operating parameters, and the effects of oil setting on the transportation startup were introduced. Then, the events of viscosity anomaly were taken as the example to comparatively analyze the important parameters and data before and after the events, e.g. pipeline flow rate, pressure, viscosity and hydraulic slope. And it was ultimately determined that the high mixing ratio of heavy oil and the clump of impurity particles deposited in partial pipelines are two key influential factors. In order to ensure the safe operation of pipeline and avoid the reoccurrence of viscosity anomaly event, it is suggested to strictly control the operation parameters(e.g. mixing proportion and viscosity) and define the pigging frequency based on the sampling data, combined with the actual production situations, so as to optimize pipeline production and operation. The research results provide the technical support for safe transportation of mixed oil.