CFD Simulation of the Effect of Different Oils on Water Wetting and Internal Corrosion of Oil Pipelines

2016 ◽  
Author(s):  
Hassan Pouraria ◽  
Jung Kwan Seo ◽  
Jeom Kee Paik
Keyword(s):  
Cfd Simulation ◽  
Water Layer ◽  
Balance Model ◽  
Complex Nature ◽  
Internal Corrosion ◽  
Water Wetting ◽  
Oil Pipelines ◽  
Oil Water ◽  
Past Experiences ◽  
Sweet Corrosion

Internal corrosion of subsea flow-lines and pipelines is one of the major challenges in flow assurance. Although the crude oil itself is not corrosive the presence of water and dissolved gasses such as CO2 and H2S can potentially result in internal corrosion. It is well known that the corrosion occurs if a continuous layer of corrosive water wet the pipe. However, past experiences revealed that the probability of water wetting critically depends on the oil properties. Due to the complex nature of oil-water flows predicting the phase behavior under different conditions is a challenging task. Hence, any progress in developing a reliable method for predicting the onset of water wetting and the characteristics of corrosive water layer can significantly increase the accuracy of corrosion prediction as well as the confidence regarding the integrity of the pipelines. The present study is an attempt toward using computational fluid dynamics for studying the effect of oil properties on the sweet corrosion. To this end, an Eulerian-Eulerian approach along with population balance model is employed. Furthermore, the capability of model in predicting the main features of oil water flow and the effect of different crude oils on water wetting and corrosion rate are investigated.

scholarly journals A numerical study on water wetting associated with the internal corrosion of oil pipelines

2016 ◽  
Vol 122 ◽  
pp. 105-117 ◽  
Author(s):  
Hassan Pouraria ◽  
Jung Kwan Seo ◽  
Jeom Kee Paik
Keyword(s):  
Numerical Study ◽  
Internal Corrosion ◽  
Water Wetting ◽  
Oil Pipelines

Corrosion behaviour of X65 carbon steel under the intermittent oil/water wetting: A synergic effect of flow velocity and alternate immersion period

2021 ◽  
Vol 187 ◽  
pp. 109507
Author(s):  
Wen Long Ma ◽  
Han Xiang Wang ◽  
Richard Barker ◽  
Nikil Kapur ◽  
Yong Hua ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Flow Velocity ◽  
Corrosion Behaviour ◽  
Synergic Effect ◽  
Water Wetting ◽  
Immersion Period ◽  
Oil Water

scholarly journals АНАЛІЗ ОСОБЛИВОСТЕЙ ВНУТРІШНЬОЇ КОРОЗІЇ НАФТОПРОВОДУ ТА МЕТОДОЛОГІЯ ЇЇ ДОСЛІДЖЕННЯ МЕТОДОМ ПОЛЯРИЗАЦІЙНОГО ОПОРУ

2020 ◽  
Vol 144 (2) ◽  
pp. 105-114
Author(s):  
Л. І. Ниркова ◽  
С. О. Осадчук ◽  
Ю. В. Борисенко ◽  
Ф. М. Макатьора
Keyword(s):  
Water Content ◽  
Polarization Resistance ◽  
Laboratory Testing ◽  
Water Emulsion ◽  
Minimum Concentration ◽  
Internal Corrosion ◽  
Oil Pipeline ◽  
Testing Facility ◽  
Oil Water ◽  
Moving Line

Development of methodology for research and evaluation of internal corrosion of low-carbon steel pipeline along the bottom moving line in a hydrocarbon medium with different water content. Visual inspection and polarization resistance method were used. Based on the analysis of the peculiarities of internal corrosion of oil pipelines, the methodology of its research has been developed. A laboratory testing facility is proposed and manufactured, which simulates the inner surface of the pipeline. The design of the polarization resistance sensor was improved by applying a moisture-retaining layer, which allowed to determine the corrosion rate in the oil-water emulsion. To increase the sensitivity of the sensor in this environment, additives are introduced into the moisture-retaining layer, which promote the absorption and retention of moisture. The influence of various additives on the sensitivity of the sensor has been studied, the method of applying the moisture-retaining layer, which is suitable for use, has been worked out. The minimum concentration of the additive was determined, at which a solid moisture-retaining layer resistant to the action of moisture was obtained. The methodology of research of internal corrosion of the oil pipeline along the bottom moving line on the basis of modeling in laboratory conditions of a surface of a pipe is offered and substantiated. A laboratory testing facility was made and the design of the polarization resistance sensor was improved, which made it possible to perform measurements in oil-water emulsion. This allowed to expand the scope of the method of polarization resistance for oil environments with low water content (from 50% to 5%). The design of the electrochemical two-electrode sensor of polarization resistance with the cosurface arrangement of electrodes on which the moisture-retaining layer is put and its composition is defined is improved. A solid layer resistant to air moisture is obtained. The sensor with a moisture-retaining layer is suitable for use in oil-water emulsion with water content from 50% to 5%.

Research of Extracting Information about Reservoir Logging Signals Based on Chaos Characteristics

2013 ◽  
Vol 380-384 ◽  
pp. 3742-3745
Author(s):  
Chun Yan Nie ◽  
Rui Li ◽  
Wan Li Zhang
Keyword(s):  
Lyapunov Exponent ◽  
Correlation Dimension ◽  
Approximate Entropy ◽  
Water Layer ◽  
Time Correlation ◽  
Largest Lyapunov Exponent ◽  
Characteristic Parameters ◽  
Chaotic Characteristic ◽  
Oil Water

The mechanism of logging signals generating was researched. In the same time, correlation dimension, largest Lyapunov exponent and approximate entropy of chaotic characteristics were extracted. On this basis, chaotic characteristic parameters were applied in processing, analysis and interpretation, try to find chaotic characteristics of different of reservoirs for example oil, water layer and the dry layer. The results showed that chaos characteristics in different reservoir is different, therefore, we can distinguish the different natures of reservoirs by extracting chaos characteristics.

Investigations on the dynamic water-wetting process relating to the internal corrosion

2020 ◽  
Vol 43 (5) ◽  
pp. 425-437
Author(s):  
Xiaofei Liu ◽  
Henghui Xu ◽  
Chengcheng Gong ◽  
Haozhe Jin ◽  
Chao Wang
Keyword(s):  
Internal Corrosion ◽  
Water Wetting ◽  
Wetting Process

Guidance and control for own aircraft in the autonomous air combat: A historical review and future prospects

2019 ◽  
Vol 233 (16) ◽  
pp. 5943-5991
Author(s):  
Yiqun Dong ◽  
Jianliang Ai ◽  
Jiquan Liu
Keyword(s):  
Historical Review ◽  
Autonomous Driving ◽  
Problem Definition ◽  
Group Method ◽  
Complex Nature ◽  
Guidance Control ◽  
Depth Analysis ◽  
Air Combat ◽  
Past Experiences ◽  
And Control

The Autonomous Air Combat technique has been a lasting research topic for decades. However, no complete solutions seem to have appeared because of the highly dynamic and complex nature of the Autonomous Air Combat problem. In devising the Autonomous Air Combat solutions, we follow similar methodologies in the robotics community, and divide the overall scheme into two folds: the perception of other (enemy/friendly) aircraft, and the guidance/control for own aircraft. While the perception in the first fold serves as a foundation, this paper is mainly focused on the second one. Based on our survey, a review of own aircraft guidance/control in the (primarily one-to-one) Autonomous Air Combat solutions is presented. We divide different Autonomous Air Combat solutions into three groups, i.e. mathematics-based, knowledge-encoded, and learning-driven. In each group, we present the representative methods first; problem definition, solution, and a brief overview of the historical development are illustrated. We also comment on both weakness and strengths for each group/method. We point out certain technical paths/challenges that need to be addressed in the future Autonomous Air Combat development, i.e. to abstract and emulate the human pilot experiences, and to develop the online learning capabilites. Inspired by the state-of-art techniques in other similar fields (robotics, autonomous driving), we also propose potential solutions, i.e. traditional approaches enhanced by the novel data-driven technique. Via this paper, we hope to deliver an in-depth analysis of past experiences and potential challenges/solutions for the Autonomous Air Combat technique. We also advocate referring to the approaches/techniques that are utilized in other similar fields in devising the Autonomous Air Combat solutions.

Experimental Studies of Water Wetting in Large Diameter Horizontal Oil-Water Pipe Flows

2005 ◽  
Author(s):  
J.Y. Cai ◽  
Srdjan Nesic ◽  
Chong Li ◽  
Xuanping Tang ◽  
Francois Ayello ◽  
...  
Keyword(s):  
Large Diameter ◽  
Experimental Studies ◽  
Water Pipe ◽  
Pipe Flows ◽  
Water Wetting ◽  
Oil Water
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