Transportation of Paraffinaceous Oil
Development of Depressant Technology for Transportation of Paraffinaceous Oil by the Means of Oil-Trunk Pipeline Uzen’-Atyrau-Samara
Tech Area / Field
- MAN-OTH/Other/Manufacturing Technology
- NNE-FUE/Fuels/Non-Nuclear Energy
3 Approved without Funding
Kazakh National University, Kazakstan, Almaty
- Institute of Thermophysics, Russia, Novosibirsk reg., Novosibirsk\nKazakh-British Technical University, Kazakstan, Almaty
- University of Science and Technology, Poland, Krakov\nChalmers University of Technology / Division of Thermo and Fluid Dynamics, Sweden, Göteborg
Project summaryState of the art. High flow capacity and labor productivity, low transportation cost price are the characteristic for pipeline oil transportation. Labor productivity at pipeline transportation is higher by the factor of 5-6 and cost of pumping is lower by the factor of 3.5-4 than those at carriage by rail. The most challenging problem of pipeline transportation is carriage of heavy, high-temperature-solidification oils. This is caused by their physical-chemical features. Heavy, high-temperature-solidification oils are substances of a complex composition: solution of solid paraffin, pyrobitumen and tar in liquid hydrocarbons. At cooling, paraffin is extracted in a wide range of temperatures. Deviation of properties of heavy, high temperature-solidification oils from Newton ones is detected even at the initial temperature of paraffin crystallization, and this is especially evident close or below the solidification temperature. Therefore, the thermal regime is an essential factor determining technology of paraffin-base oil pumping.
Different methods for transportation of high-temperature-solidification oil are known. They differ by the methods of energy reduction for friction compensation. The method of hot pumping is the most recognized and reliable among them. However, with a rise in the prime cost of paraffin-base oil, this method becomes economically unprofitable.
To provide the efficiency of pipeline transportation at delivering of heavy high-temperature-solidification oils, special methods directed to improvement of rheological characteristics of transmitted oils are required. Rheological characteristics become additional parameters for control of oil-pipe operation.
Recently, depressant additives are often used at transportation high-temperature-solidification oil. They effect the structure of volumetric lattice and prevent its formation, i.e., they improve rheological properties of oil and namely: reduce the temperature of solidification, decrease efficient viscosity, diminish the effect of plastic forces, and as a result, losses on friction become lower.
Special properties of a depressant additive set new tasks for pipeline transportation, requiring experimental and calculation-theoretical studies: 1) determination of oil mixture rheology with consideration of depressant additives; 2) formulation of regularities for drag and heat transfer under the action of depressant additives; 3) creation of a mathematical model for transportation of paraffin-base oil under the action of depressant additives; 4) pilot testing of depressant technology; 5) development of technical solution for implementation of depressant technology.
The project under consideration is aimed at solution of above-mentioned problems and deals with development of depressant technology for delivering of paraffin-base oils via trunk pipelines.
Competence of the Project team. High-skilled scientists, engineers and specialists from KazNU, ITP SB RAS and KBTU, involved into this project, participated previously in developments of rocket and nuclear equipment of space and military application as well as in developments of chemical weapon. Participation in this project will allow them to contribute to development of efficient depressant technology for delivering of paraffin-base oils via trunk pipelines. Therefore, this project completely meets the goals and tasks of ISTC.
Al-Farabi Kazakh National University has long experience of R&D works on the problems of petroleum industry. The scientists from this university have developed the technology of collection of stored oil, software for thermal-hydraulic simulations of hot delivery of paraffin-bas oils via trunk pipelines, etc. The Institute of Thermal Physics SB RAS is one of the leading research organizations of Russia in the field of experimental and calculation-theoretical studies of hydrodynamics and heat transfer at movement of single- and multiphase media in various devices. The scientists of IT have obtained fundamental results on regularities of turbulent flows and heat transfer in channels, boundary layer, etc. Kazakh-British Technical University NC “Kazmunaigaz” is the special-purpose organization for applied research in the field of pipeline transportation, and it provide implementation of new technologies to oil delivery via trunk pipelines.
Scope of activities. The whole work consists of three stages. At first, experimental and calculation-theoretical studies will be performed to formulate regularities of drag and heat transfer for laminar and turbulent flow regimes of paraffin-base oil mixture with at depressant additive. At second, the method of thermal-hydraulic calculations will be developed for delivery regimes of paraffin-base oils with depressant additives via trunk pipelines. At third, pilot testing of the depressant technology will be carried out in a linear part of the trunk pipeline. All stages of this project are connected and aimed at reliable results in development and implementation of depressant technology.
In the framework of the project, the following work will be carried out:
1) the study of hydrodynamics and heat transfer at movement of paraffin-base oils with depressant additives; determination of regularities for drag and heat transfer under various regimes of oil flow in a tube;
2) development of the method for thermal-hydraulic calculations of oil-plus-additive delivery under conditions of the trunk pipeline;
3) obtaining of technical solution for practical implementation of depressant technology in transportation of heavy high-temperature-solidification oil mixtures via trunk pipelines.
The project refers to “Technology development” category with ISTC “MAN-OTH” code.
Technical approach and methodology. The complex study on development and implementation of depressant technology for transportation of heavy high-temperature-solidification oil mixtures via trunk pipelines will be performed. Combination of physical experiments under laboratory conditions with calculation and theoretical studies of hydrodynamics and heat transfer under various regimes of oil mixture flow will increase reliability of results obtained and provide formulation of regularities for drag and heat transfer at motion of oil mixture with a depressant additive. The method of thermal-hydraulic calculations on the basis of formulated regularities for drag and heat transfer in oil mixture with depressant additives in combination with results of pilot testing allows development of efficient technology for delivery of heavy high-temperature-solidification oils via trunk pipelines.
Experimental and calculation studies on formulation of regularities for drag and heat transfer at transportation of oil mixtures with depressant additives will be carried out at IT SB RAS, the method of thermal-hydraulic calculations on the regimes of oil mixture delivery and pilot testing of depressant technology under conditions of trunk pipeline will be performed at KazNU and KBTU.
The following equipment will be used for experimental investigations: laboratory model of installation for the study of oil mixture movement and heat transfer in a tube, viscometers, devices for determination of oil mixture rheological properties, devices for measurements of hydrodynamic and thermal characteristics of oil mixture flow. Drag and heat transfer regularities of oil mixture and depressant additive flow are determined using modern ideas of turbulence and heat transfer.
Pilot testing and thermal-hydraulic calculations using drag and heat transfer regularities allow determination of optimal conditions for implementation of depressant technology into practice of heavy high-temperature-solidification oil transportation.
The following results are expected:
1) Drag and heat transfer regularities at various flow regimes for the oil mixture with depressant additives in a tube.
2) The engineering method of thermal-hydraulic calculation for regimes of oil mixture delivery with depressant additives.
3) Data of pilot testing of depressant technology within a linear region of the trunk pipeline.
4) Technical and economic assessment of depressant technology efficiency for delivery of heavy high-temperature-solidification oil mixture via trunk pipelines.
Role of foreign collaborators of the given project will be Dr. E.K. Ogai, Needham Group, Inc., USA is the collaborator of the current project. Dr. E.K. Ogai provides scientific supervising and scientific-methodical consultations for development of the pilot test plans on depressant technology, participates in result discussions, and reviews scientific and technical reports of project executives. We'll discuss with collaborator E.K. Ogai the results of calculations and experiments under the Project. The collaborator will give us methodical recommendations on the results analysis, as well as on using the depressant technology.
The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.
ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.