热化学流体去除生产系统积蜡的新技术

Amjed Hassan, O. Alade, M. Mahmoud, Abdulaziz Al-Majed
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引用次数: 3

摘要

在石油工业中,烃类蜡的沉积是一个关键问题。蜡会在完井、地面设施和运输管道内沉积和积聚。蜡沉积会导致生产系统的压力显著下降,并可能导致油气生产停止。采用了几种处理方法来去除沉积的蜡并改善油气流动。本文提出了一种经济有效的去除生产系统中蜡沉积的新技术。在这项工作中,廉价和环保的流体已被用于除蜡。使用在一定条件下能够产生热量和压力的化学物质。在本研究中,利用热化学流体去除生产油管中积累的蜡。以阿拉伯油田的实际蜡为研究对象,模拟蜡沉积的真实情况。由两种化学试剂组成的热化学溶液用于去除生产油管中积累的蜡。所使用的化学品在一定条件下能发生反应,并产生大量的热量和压力。由于热化学反应,可以在现场产生高达500°F的温度和高达2000 psi的压力。用醋酸作活化剂可触发化学反应,减少除蜡操作时间。结果表明,使用热化学溶液可以去除95%以上的沉积蜡。现场产生的热量能够液化沉淀的蜡,然后,由于化学反应产生的诱导压力可以将蜡冲出生产油管。使用的化学品未对管道造成任何损坏,生产油管未发生腐蚀或沉淀。此外,由于热化学处理产生的压力没有降低管道的完整性,在处理的样品中没有引起管道扩大或损坏。本研究提出了一种使用热化学流体的新型高效除蜡方法。使用过的化学品可以去除生产管道、地面设施和运输管道上的蜡;不影响生产系统的完整性。热化学流体可用于高温、高盐度等恶劣工况。结果表明,在未来几个月内,该工作具有良好的现场应用潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Novel Technique for Removing Wax Deposition in the Production System Using Thermochemical Fluids
In the petroleum industry, deposition of hydrocarbon wax is one the critical problems. Wax can deposit and accumulate inside the well completion, surface facilities and transportation pipelines. Wax deposition can lead to significant pressure drop in the production system and may result in stopping the hydrocarbon production. Several treatments are used to remove the deposited wax and improve the hydrocarbon flow. This paper presents a new and cost-effective technique for removing the wax deposition from the production system. In this work, inexpensive and environmentally-friendly fluids have been used for wax removal. Chemicals that able to generate heat and pressure at certain condition were used. In this study, thermochemical fluids were utilized to remove the accumulate wax in the production tubing. Actual wax from Arabian oil field was used to mimic the real condition of wax deposition. Thermochemical solutions that consist of two chemical reagents were used to remove the accumulated wax in a production tubing. The used chemical can react at certain condition and generate significant amount of heat and pressure. Temperature up to 500°F and pressure up to 2000 psi can be in-situ generated due to the thermochemical reaction. The chemical reaction can be triggered using acetic acid as an activating agent, to reduce the operational time for wax removal. The results showed that, more than 95% of the deposited wax can be removed using thermochemical solutions. The in-situ generated heat is able to liquefy the precipitated wax, then, the induced pressure due to the chemical reaction can flush the wax out of the production tubing. The used chemicals did not result in any damage in the pipeline, no corrosion or precipitation was observed in the production tubing. Also, the generated pressure due to thermochemical treatment did not reduce the pipe integrity, no pipe enlargement or damage was induced in the treated samples. This study presents a novel and high-performance treatment for wax removal using thermochemical fluids. The used chemicals can remove the wax from production tubing, surface facilities, and transportation pipelines; without affecting the integrity of the production system. The thermochemical fluids can be used at harsh situation of high temperature and high salinity condition. The obtained results show that there is a good potential for field application of this work in the next few months.
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