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Edition and Publication:
< Natural Gas and Oil > Editorial Department
Hosted by:
China Petroleum Engineering & Construction Corporation Southwest Company
Authorized by:
China Petroleum Engineering & Construction Corporation
Co-hosted by:
Overseas Research Center of Research Institute of Petroleum Exploration and Development
Editor in Chief:
Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
Address:
No.6, Shenghua Road, High-tech District, Chengdu, Sichuan, China
Postal Code:
610041
Tel:
028-86014709
028-86014500
Email:
cnpc-ngo@cnpc.com.cn
Issue:ISSN 1006-5539
CN 51-1183/TE

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Study on Liquidity Improvement of Crude Oil at The Initial Station of Asai Pipeline

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Key Words： Asai Pipeline crude oil； EVA pour point depressant； Liquidity improvement； Wax crystal structure

Abstract： Assessed and analyzed is the sensitivity of Asai Pipeline crude oil on EVA， a pour point depressant used commonly， in order to reduce crude oil transportation temperature and assure safe operation of the crude oil transportation pipeline. Taken is crude oil in the initial station of Asai Pipeline as a research object and adopted is the crude oil condensation point and rheology test method to assess the pour point and viscosity reduction effect of the typical domestic pour point depressant on Asai Pipeline crude oil. Comparatively analyzed are wax crystal shapes in Asai Pipeline crude oil before and after pour point depressant injection and discussed are main factors affecting its low temperature liquidity improvement. The results show that freezing point， abnormal point and low temperature apparent viscosity of Asai Pipeline crude oil are significantly lowered with the effect of 70mg/kg EVA， but the pour point depressant injection temperature and high speed shear have large effect on EVA and effect of pour point depressant injection became obviously poor when injection temperature is below 60℃. However， low speed shear for a long time has not obvious effect on pour point depressant injection.