A critical review of the Modeling of wax deposition mechanisms
A critical review of the Modeling of wax deposition mechanisms
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DOI：
10.1081/lft-120018528
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发表时间：
2003-01-01
影响因子：
1.5
通讯作者：
Teixeira, AM
中科院分区：
文献类型：
--
作者：
Azevedo, LFA;Teixeira, AM
高分子量石蜡在海底生产和运输管道内壁的沉积一直是石油工业面临的一个关键操作问题。沉积物质在管道内壁的堆积可能导致泵送功率增加，流量降低，甚至导致管道完全堵塞，造成生产和资金投资损失。本文提出了一个关键的审查研究工作，致力于理解和控制蜡沉积过程的基本沉积机制的建模。石蜡的分子扩散被认为是主要的沉积机制。文献中大多数沉积模型都将分子扩散作为预测石蜡沉积时空分布的唯一机制。然而，本文的文献研究表明，没有足够的实验证据来支持这一假设。其他沉积机制，如固体蜡晶体的布朗扩散也可能起作用。
Deposition of high molecular weight paraffins on the inner wall of subsea production and transportation pipelines continues to be a critical operational problem faced by the petroleum industry. The accumulation of the deposited material on the inner wall of the lines may lead to increased pumping power, decreased flow rate or even to the :total blockage of the line, with loss of production and capital investment. The present paper presents a critical review of the research effort devoted to the understanding and modeling of the basic deposition mechanisms that control the wax deposition processes. Molecular diffusion of paraffin has been identified as the dominant deposition mechanism. Most deposition models available in the literature make use of molecular diffusion as the sole mechanism for predicting spatial and temporal distributions of paraffin deposits. However, the study of the literature conducted in the present paper evealed that there is not enough experimental evidence to support this assumption. Other deposition mechanisms, such as Brownian diffusion of solid wax crystals may also play a role.