Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

STUDY ON THE EFFECT OF VOIDS ON RESTART PUMPING OF GELLED CRUDE OIL IN PRODUCTION PIPELINE

Mustafa, Afildhatul Nashima (2013) STUDY ON THE EFFECT OF VOIDS ON RESTART PUMPING OF GELLED CRUDE OIL IN PRODUCTION PIPELINE. Universiti Teknologi Petronas. (Unpublished)

[img] PDF
Download (1539Kb)

Abstract

Waxy crude oil can be found in many parts of the world for exploration and production purposed. The crystallisation of waxy crude oil during the transportation through pipeline may cause problems. The waxy crude oil may gel up during the platform shutdown and thus causes blockage in the pipeline. At a very high temperature at which it can reach up to 90°C especially in the reservoir, the waxy crude oil behaves as Newtonian fluid. When the temperature starts to decrease while flowing in the production pipeline, wax will form upon reaching the limit of Wax Appearance Temperature (WAT) as a result of cooling due to the low seabed temperature. The problem becomes more serious as the crude oil gelled up and clogs the pipeline as the temperature decreases and reaches the pour point temperature. Restarting the flow would be a problem because when the crude oil becomes gelled, it would be hard to initiate the flow of the oil and might damage the pipeline due to the gelled up crude oil that cannot be transported. The equation that has been used to calculate the restart pressure has be over predicted as it does not consider the compressibility characteristic of the crude oil. The gas voids formation during the transportation may also affect the compressibility of the oil. The objective of this work is to determine the effect of gas voids on the restart pressure the flow of gelled crude oil. The effect of gas voids was observed and compared by having the original sample and the second sample that is injected with air. The compressibility test was done to both of the sample. From the study it is shown that the gelled crude oil can be compressible and the pressure applied also affect the movement of the crude oil. The compressibility factor for the injecting air sample is higher compared to the original sample as it is the result of voids formation. The compressibility factor of the gelled crude oil from original sample (Sample 1) and injecting air (Sample 2) was 0.001 and 0.003 respectively for every 0.5 bar pressure applied.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Petroleum
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 15 Nov 2013 15:20
Last Modified: 25 Jan 2017 09:38
URI: http://utpedia.utp.edu.my/id/eprint/10629

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...