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51318-11213-Study of Phase Wetting in Oil-Water-Gas Horizontal Pipe Flow. Recommendations for Corrosion Risk Assessment

Picture for Study of Phase Wetting in Oil-Water-Gas Horizontal Pipe Flow. Recommendations for Corrosion Risk Assessment
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This work studies phase wetting regimes in three-phase oil-water-gas horizontal flow in a 0.1 m diameter carbon steel pipe in a flow loop, for flow conditions where liquid-gas slug flow pattern is predominant.

Product Number: 51318-11213-SG
Author: L.D. Paolinelli
Publication Date: 2018
Industry: Gas/Liquid Pipelines
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Accurate prediction of the phase wetting regime of internal pipe walls of oil production lines is of paramount importance when performing internal corrosion assessments. Therefore, corrosion control costs can be reduced as mitigation efforts can be directly aimed at the most critical pipeline areas where water is most likely to segregate and wet the pipe wall. Surface wetting regime (e.g., oil wet or water wet) depends on several factors, such as flow rates and physicochemical properties of the transported fluids, pipe diameter and inclination, and also pipe surface wettability. This work studies phase wetting regimes in three-phase oil-water-gas horizontal flow in a 0.1 m diameter carbon steel pipe in a flow loop, for flow conditions where liquid-gas slug flow pattern is predominant. Phase wetting and water layer thickness (when water wet) were measured using high frequency impedance probes flush-mounted at the internal pipe wall. Different mechanisms of water wetting are inferred from the obtained data for the bottom and top pipe walls. Maps of phase wetting regime and water layer thickness versus operating conditions are shown for different water cuts. Experimental data is discussed and compared with predictions from a proposed three-phase hydrodynamic model. Consequently, recommendations are provided for direct internal corrosion assessment.

Key words: oil-water-gas flow; phase wetting; water drop-out; modeling; direct internal corrosion assessment

Accurate prediction of the phase wetting regime of internal pipe walls of oil production lines is of paramount importance when performing internal corrosion assessments. Therefore, corrosion control costs can be reduced as mitigation efforts can be directly aimed at the most critical pipeline areas where water is most likely to segregate and wet the pipe wall. Surface wetting regime (e.g., oil wet or water wet) depends on several factors, such as flow rates and physicochemical properties of the transported fluids, pipe diameter and inclination, and also pipe surface wettability. This work studies phase wetting regimes in three-phase oil-water-gas horizontal flow in a 0.1 m diameter carbon steel pipe in a flow loop, for flow conditions where liquid-gas slug flow pattern is predominant. Phase wetting and water layer thickness (when water wet) were measured using high frequency impedance probes flush-mounted at the internal pipe wall. Different mechanisms of water wetting are inferred from the obtained data for the bottom and top pipe walls. Maps of phase wetting regime and water layer thickness versus operating conditions are shown for different water cuts. Experimental data is discussed and compared with predictions from a proposed three-phase hydrodynamic model. Consequently, recommendations are provided for direct internal corrosion assessment.

Key words: oil-water-gas flow; phase wetting; water drop-out; modeling; direct internal corrosion assessment

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51318-11223-Evaluation of Top-of-Line Corrosion Model for Multiphase Oil and Gas Environments

Product Number: 51318-11223-SG
Author: H. Li / K. M. Yap / S. Srinivasan
Publication Date: 2018
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The model was evaluated and effects of various parameters on corrosion rates are described. Corrosion rates obtained from the model are compared with actual field and lab testing data as a basis to quantify accuracy and efficacy.
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51318-11294-NACE MR0175/ISO 15156: Update on current document and where are we going?

Product Number: 51318-11294-SG
Author: Robert P. Badrak
Publication Date: 2018
$20.00

This standard is now undergoing a critical review to determine how it should change to meet the future needs of the Oil & Gas Industry better. Where are we headed with NACE MR0175/ISO 15156? The results of our collective initial efforts are presented.
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51318-11630-Internal Corrosion Direct Assessment of a Wet Gas Pipeline

Product Number: 51318-11630-SG
Author: Xihua S. He / Debashis Basu / and Osvaldo Pensado / Jianyun Mei / Bibo Zhang / Hongbo Wu / Yongzhao Fan / Deqiang Cai / Yang Li
Publication Date: 2018
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This work applied the Wet Gas-Internal Corrosion Direct Assessment (WG-ICDA) standard to assess the severity of internal corrosion of 2 segments along a pipeline used to transport wet gas from a gas mine.
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