WELL BORE STABILITY MODEL BASED ON ITERATIVE COUPLING METHOD FOR WATER ALTERNATING GAS (WAG) INJECTION
The water alternating gas injection is increasingly applied globally as the effective Enhanced Oil Recovery (EOR) method in oil wells. Fluid injection with high pressure or low temperature could lead to wellbore fracturing. The rock stress around the well bore is a function of the wellbore fluid...
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | http://utpedia.utp.edu.my/21924/1/2016%20-PETROLEUM%20-%20WELLBORE%20STABILITY%20MODEL%20BASED%20ON%20ITERATIVE%20COUPLING%20METHOD%20FOR%20WATER%20ALTERNATING%20GAS%20%28WAG%29%20INJECTION%20-%20MAHMOOD%20BATHAEE.pdf http://utpedia.utp.edu.my/21924/ |
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| Summary: | The water alternating gas injection is increasingly applied globally as the effective
Enhanced Oil Recovery (EOR) method in oil wells. Fluid injection with high pressure
or low temperature could lead to wellbore fracturing. The rock stress around the
well bore is a function of the wellbore fluid flow and it should be determined to avoid
the wellbore failure. The purpose of this study is to propose an iterative coupling
method to ensure well bore stability for the WAG injection. The effective parameters
such as pressures, temperature, saturations and stresses are obtained for the multi phase
flow condition using mathematical modeling. In this study, finite difference method is
used to calculate pressure, temperature and saturations; and finite volume method is
applied to evaluate stresses. Iterative coupling method is used to improve the accuracy
of the results. The mechanical properties of rock such as Poisson's ratio and Young
modulus will be changed after saturation alteration. |
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