#TITLE_ALTERNATIVE#

• Main Author: ERWINSYAH UMRA LUBIS (NIM : 12214019), DEFRY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26461
• Institution: Institut Teknologi Bandung

Erosion is the critical problem in oil and gas industry which can cause fatality while facilities failure <br /> <br /> happening. Frequently, production fluid rate is drastically reduced for temporary handling of sand problem <br /> <br /> causing lost revenue to the company. Thus, accurate prediction in erosion phenomen will lower detrimental <br /> <br /> effect to the facilities integrity and optimize production rate of oil and gas. <br /> <br /> This research presents a method to predict erosion in gas flowline induced by sand production from welbore <br /> <br /> utilizing ANSYS Fluent CFD. Literature study was conducted to choose appropriate fluid and particle flow <br /> <br /> model in pipe to describe sand erosion phenomena. Volume of Fluid and RNG k- &#949; is selected as multiphase and <br /> <br /> turbulence model. Then, velocity coupling uses coupled with volume fractions for correcting couples velocity, <br /> <br /> shared pressure, and volume fraction simultaneously. Mach number calculation indicae that the CFD <br /> <br /> simulation could be run in incompressible model. Beggs and brill correlation commonly used in oil and gas <br /> <br /> industry is applied to match flow pattern resulted by CFD simulation. <br /> <br /> Erosion phenomena simulation result in several geometries of bending pipe and straight pipe with sensitivity of <br /> <br /> gravity direction shows that gravity direction has enough influence particularly in multiphase flow due to the <br /> <br /> existence of brine gives drag force to the particle impact which will reduce the erosion. Parameters affecting <br /> <br /> fluid velocity such as pipe diameter and gas rate determine the erosion severity. The bigger the particle size up <br /> <br /> to 250 micron, the more severe the erosion. However, if the particle is larger than 250 micron, the amount of <br /> <br /> particle will be decreased in the same particle rate and density. Comparison erosion in bending pipe nearly <br /> <br /> twenty times straight pipe. The optimum and safe gas rate obtained from CFD simulation is approximately 55 <br /> <br /> MMSCFD.