Questions and Answers
What is the Bo (oil formation volume factor) for the linear-reservoir system?
What is the average water saturation at water breakthrough?
How does the Kro/Krw ratio change as Sw increases from 0.2 to 0.8?
What is the total pore volume of water injected at breakthrough?
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What is the injection rate provided for the water in this linear-reservoir system?
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Study Notes
Linear-Reservoir System Data Overview
- Sw: Water saturation, varies from 0.2 to 0.8 in increments.
- Kro/Krw: Relative permeabilities for oil and water; ranges from 0 to 305.
- Key water saturation points:
- Sw = 0.2: Kro/Krw = 0
- Sw = 0.25: Kro/Krw = 305.00
- Sw = 0.3: Kro/Krw = 52.22
- Sw = 0.75: Kro/Krw = 0.04
- Sw = 0.8: Kro/Krw = 0.00
Reservoir Properties
- Bo (Oil formation volume factor) = 1.3 bbl/STB
- Bw (Water formation volume factor) = 1.0 bbl/STB
- Height of the reservoir (h) = 20 ft
- Injection rate (Iw) = 900 bbl/day
- Length of the reservoir (L) = 600 ft
- Water saturation at connate conditions (Swc) = 20%
- Kinematic viscosity of oil (μo) = 5.0 cp
- Porosity (φ) = 25%
- Area of the reservoir (A) = 25,000 ft²
- Kinematic viscosity of water (μw) = 0.5 cp
- Initial water saturation (Swi) = 22%
Analysis Tasks
- Plotting of water fractional flow (fw) versus water saturation (Sw) curve to determine flow characteristics and recovery efficiency.
- Calculation of water cut and water saturation at the front when breakthrough occurs.
- Calculate the distance from the injection well to the leading edge of the water front after 100 days of injection.
- Average water saturation at the point of water breakthrough is to be determined.
- Total pore volumes of water injected at breakthrough will be calculated for reservoir management.
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Description
This quiz focuses on analyzing key properties and saturation data within a linear-reservoir system. Participants will explore the relationship between water saturation and relative permeability, while also examining reservoir characteristics such as porosity and injection rate. Engage in plotting water fractional flow curves to enhance understanding of recovery efficiency.
