Podcast
Questions and Answers
What is the main purpose of accurately estimating lithology and porosity in reservoirs?
What is the main purpose of accurately estimating lithology and porosity in reservoirs?
- To estimate the saturation and volume of hydrocarbons (correct)
- To calculate the salinity of formation water
- To determine the Archie equation
- To understand the effects of Rw on hydrocarbon volume
Why do petrophysicists find Rw challenging despite it being seemingly simple?
Why do petrophysicists find Rw challenging despite it being seemingly simple?
- Due to variations in formation water salinity (correct)
- Because it is a linear multiplier
- Because it directly influences the Archie equation
- Due to its consistency across reservoirs
How does an increase in Rw affect the calculated water saturation (Sw)?
How does an increase in Rw affect the calculated water saturation (Sw)?
- Decreases Sw
- Has no effect on Sw
- Increases Sw (correct)
- Reduces porosity
What is the impact of Rw on the Archie equation and its derivatives?
What is the impact of Rw on the Archie equation and its derivatives?
Why does Rw not have a linear relationship with water saturation (Sw)?
Why does Rw not have a linear relationship with water saturation (Sw)?
What factor leads to variations in Rw across fields like hyper-saline fields in the US?
What factor leads to variations in Rw across fields like hyper-saline fields in the US?
What is one of the main challenges when deriving Rw from recovered formation water samples?
What is one of the main challenges when deriving Rw from recovered formation water samples?
In what kind of water is Rw relatively insensitive when saltier than 50,000 ppm NaCl equivalent?
In what kind of water is Rw relatively insensitive when saltier than 50,000 ppm NaCl equivalent?
What does a change in salinity from 50,000 ppm to 60,000 ppm result in for Rw at 75 °F?
What does a change in salinity from 50,000 ppm to 60,000 ppm result in for Rw at 75 °F?
How is Rw commonly measured when using recovered formation water samples?
How is Rw commonly measured when using recovered formation water samples?
What can happen to some component salts in recovered formation water samples due to pressure and temperature changes?
What can happen to some component salts in recovered formation water samples due to pressure and temperature changes?
What factor can significantly influence the precision of an analysis that relies on Rw for calculation?
What factor can significantly influence the precision of an analysis that relies on Rw for calculation?
