Abstract
Emulsion of waxy crude oil is one of the common states in the subsea pipeline. At low temperatures in offshore environment, waxy crude oils with water could form the crude oil emulsion gel of oil-in-water emulsion. Thus, the waxy crude oil emulsion viscoelastic behavior for deep sea transportation and restarting pipeline safety is particularly important. By means of MASIII HAAKE rheometer which is produced by German company, waxy crude oil emulsion viscoelastic behavior is explored at different volumetric water contents and different shear stresses. By analyzing the rate of change of shear rate in the initial stage, the influence rules of viscoelastic properties were summarized, with the change of volumetric water content and the applied shear stress and based on the experimental results, the law of emulsion is explained from the micro level. It is proposed that brittle fracture exists between wax crystals, and flexible fracture was found in the interaction between water droplets and wax crystals.
Highlights
With the global strategic oil basis to the deep sea, oil and water mixed transportation technology has great application value in the submarine pipeline
It is proposed that brittle fracture exists between wax crystals, and flexible fracture was found in the interaction between water droplets and wax crystals
At different volumetric water content, the shear rate will go through the following stages: 1) Rapid increase in shear rate; 2) The shear rate is increased by a rapid increase to a gentle increase; 3) Gentle increase stage
Summary
With the global strategic oil basis to the deep sea, oil and water mixed transportation technology has great application value in the submarine pipeline. We must make the pump start-up pressure can overcome the yield stress of the waxy crude oil or emulsion gel in the pipeline, in order to ensure the smooth start of the pipeline [1]. (2016) Study on Viscoelastic Behaviors of Waxy Crude Water-in-Oil. Emulsion. Viscoelastic behavior of waxy crude oil and its emulsion gel, for the safety of deep sea transport and the pipeline shutdown and restart, is especially important. The viscoelastic behavior of emulsion gel of waxy crude oil is mainly through the study of the small amplitude oscillation experiment. In order to simulate the viscoelastic process of field pipeline restarting, based on the experiment, the viscoelastic properties of waxy crude oil emulsion are studied by the method of applying constant shear stress in this paper. It is proposed that brittle fracture exists between wax crystals, and flexible fracture was found in the interaction between water droplets and wax crystals
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
