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conferenceseries
.com
Volume 8, Issue 4 (Suppl)
J Pet Environ Biotechnol, an open access journal
ISSN: 2157-7463
Oil Gas Expo 2017
July 13-14, 2017
Oil and Gas
July 13-14, 2017 Berlin, Germany
3
rd
International Conference and Expo on
J Pet Environ Biotechnol 2017, 8:4 (Suppl)
DOI: 10.4172/2157-7463-C1-035
Analytically evaluate relative permeability at unsteady-state core flooding
Hisham Khaled Ben Mahmud
1
and
Walid Mohamed Mahmud
2
1
Curtin University, Malaysia
2
University of Tripoli, Libya
S
imulation of multiphase flow in porous media requires knowledge of relative permeability, which is one of the essential
measurements in reservoir engineering due to the common existence of two-phase flow in the reservoir. The precise test of
relative permeability can be performed either by steady-state or unsteady-state flow method. The aim of coring and core analysis is
to reduce uncertainty during reservoir evaluation via providing reservoir data
in situ
conditions. The advances in core flooding and
core analysis techniques provide the premise to obtain essential petrophysical properties and to simultaneously find other reservoir
rock dependent parameters. Thus, the aim of this work is to develop a model is utilizing Sendra software (Ref) for unsteady-state
displacement method validated by two-phase flow experimental measurements. This model is based on a novel generalization of the
classical Buckley-Leverett fractional flow theory for constant pressure boundary conditions. It includes the effect of fluids viscosities
and the average fluid saturation at the breakthrough moment as measured by the rapid displacement method. Under constant pressure
boundaries, relative permeability and fluid saturation were determined from unsteady-state measurements using Johnson, Bossler
and Naumann (JBN), Pirson’s correlations and Sandra simulation software. Based on analytical results, the most accurate relative
permeability measurements were made on a native-state core, where the reservoir wettability was preserved. Moreover, Sendra
software and JBN methods yielded close non-wetting phase relative permeabilities of an oil-wet sample while Pirson method yielded
somewhat significant difference. Water-wet core samples were characterized by limited oil production after water breakthrough but
generally yielded good recoveries and low water relative permeabilities at residual oil saturation.
hisham@curtin.edu.myGas plant troubleshoot hydrate problem with out of box solution
K Sabapathi and Saleh Al Jatley
KNPC, Kuwait
T
he train-4 gas plant is designed to process 0.9 Bcfd of Kuwait associated gases to produce methane, ethane, propane, butane and
naphtha using GSP process. Column is flooding frequently and could not reach the desired recovery and purity. The potential
causes like, leak in the re-boiler, feed by pass to column, tray design and damage were analyzed. Mole sieve driers were also evaluated.
Feed quality and potential freeze of heavy component were analyzed and concluded that there is no problem in this regard. Product
gas quality measured with multiple analyzer and moisture <0.050 ppmV, but flooding continued. Methanol injection helped improve
the situation. Mercury guard bed outlet moisture is around 3 to 5 ppm. Hg guard bed inlet contains 1000 ppmV H
2
S and 1 mol%
CO
2
(H
2
S-CO
2
→
COS+H
2
O). COS can be formed in molecular sieve dehydration beds downstream due to absence of water. Hg bed
alumina aids the formation of COS due to large surface area available for catalysis and basicity of the crystal structure in the alumina
part of the adsorbent. Rate constant of this equation is function of temperature, when the temperature is higher during switching bed
and the water peaks measured in the same time after bypassing the mercury guard water content to zero. Therefore, it was decided
to shift the mercury guard bed in the upstream of the drier bed. This will call for shutdown of the plant, as interim measure it was
decided to fill the vessel with sulfur impregnated carbon on temporary basis.
k.sabapathi@knpc.com