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首页> 外文会议>Offshore Technology Conference;ExxonMobil;FMCTechnologies;Schlumberger >Mitigating Wax Deposition From Crude Oils: Correlations Between Physical-Chemical Properties of Crude Oils and the Performance of Wax Inhibitors
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Mitigating Wax Deposition From Crude Oils: Correlations Between Physical-Chemical Properties of Crude Oils and the Performance of Wax Inhibitors

机译：减轻原油中的蜡沉积：原油的物理化学性质与蜡抑制剂性能之间的相关性

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In this paper, we explore the correlations between the effectiveness of several wax inhibitors andrnphysico-chemical properties of crude oils. First, the effects of the type of fluid was studied by dissolvingrnrefined paraffin waxes in non-waxy crude oils—here termed u0002doctoredu0002 crude oils—of different propertiesrnand comparing the wax appearance temperature and pour point of the doctored crude oils to thoserndetermined for a model waxy fluid used in previous studies [1]. After treating the doctored crude oils withrnwax inhibitors, the ability of the chemicals to depress pour point was examined. Even though the paraffinrnwaxes in these fluids were exactly the same, marked differences in the effectiveness of the chemicals werernobserved. The doctored condensate was very responsive to the inhibitors in a similar manner to thatrnobserved for the model waxy fluid, while doctored crude oils from the Middle East showed a significantlyrnreduced response to most inhibitors. The results are discussed in terms of the differences in solubility ofrnthe paraffin waxes, and the chemical composition of the crude oils.rnSecondly, the influence of a wide range of crude oil properties on the effectiveness of wax inhibitorsrnwas investigated by treating seven (7) crude oils of different geographical origin with five (5) waxrninhibitors and evaluating their performance to reduce wax deposits in a cold finger experiments. Distinctrncrude oil behaviors were observed in terms of their responsiveness to the wax inhibitors. Some crude oilsrnwere equally responsive to wax inhibitors, while others showed moderate response, and one was notrnresponsive at all. The results are clear examples of the crude oil u0002specificityu0002, and demonstrate the risksrnof using model waxy fluids, or even different crude oils, to extrapolate the performance of wax inhibitors.rnAdditives that worked well in model fluids might not work at all in real crude oils.rnLastly, physical properties of crude oils and molecular characteristics derived from high-temperaturerngas chromatography (HTGC) were used to seek a correlation to wax inhibition performance usingrnchemometrics tools, specifically, principal component analysis (PCA). Preliminary results from the PCArnapproach indicate that several crude oil properties affect inhibition efficiency. The analysis suggests thatrnthe efficiency of the inhibitors studied here increases for crude oils with lower wax appearancerntemperature, lower pour point and lower carbon number distribution. It could also be inferred that inhibition efficiency was improved in crude oils containing higher amounts of asphaltenes but low waxrncontent.
机译：在本文中，我们探索了几种蜡抑制剂的有效性与原油的理化性质之间的关系。首先，通过将精制的石蜡在不同性质的非蜡质原油（此处称为u0002doctoredu0002原油）中溶解，然后将蜡的外观温度和调制后的原油的倾点与模型蜡质所确定的蜡相温度和倾点进行比较，研究了流体类型的影响。以前的研究中使用的液体[1]。用蜡蜡抑制剂处理经过刮涂的原油后，检查了化学品降低倾点的能力。尽管这些液体中的石蜡完全相同，但化学药品的有效性却存在明显差异。刮除的凝析油对抑制剂的反应非常类似于对模型蜡质液的反应，而中东刮除的原油显示出对大多数抑制剂的显着降低的反应。根据石蜡的溶解度差异和原油的化学组成对结果进行了讨论。其次，通过处理七（7）种原油，研究了各种原油性能对蜡抑制剂有效性的影响。具有五（5）种蜡抑制剂的不同地理来源的油脂，并在冷手指实验中评估其减少蜡沉积的性能。就其对蜡抑制剂的响应性而言，观察到了不同的原油行为。一些原油对蜡抑制剂的反应相同，而另一些则表现出中等的反应，而一种则完全没有反应。结果是原油具有明确的实例特性，并证明了使用模型蜡质流体甚至不同的原油来推断蜡抑制剂性能的风险。在模型流体中效果良好的添加剂可能根本无法在真正的原油中使用最后，使用化学计量学工具，特别是主成分分析（PCA），使用原油的物理性质和源自高温气相色谱（HTGC）的分子特性来寻求与蜡抑制性能的相关性。 PCArnapproach的初步结果表明，几种原油特性会影响抑制效率。分析表明，本文研究的抑制剂的效率对于蜡外观温度较低，倾点较低和碳数分布较低的原油而言有所提高。还可以推断出，在含有较高含量沥青质但蜡含量低的原油中，抑制效率得到了改善。

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