Podcast
Questions and Answers
What is the 'Delaware Effect' seen in laterologs?
What is the 'Delaware Effect' seen in laterologs?
- A sudden decrease in apparent resistivity due to a thick conductive bed like sandstone
- A decrease in true resistivity when the invasion is deep
- An increase in current flow due to the absence of adjacent beds
- A gradual increase in apparent resistivity due to a thick non-conductive bed like salt or anhydrite (correct)
What type of mud is ideal for laterologs to give their truest resistivity?
What type of mud is ideal for laterologs to give their truest resistivity?
- Mud with no invasion
- Highly resistive mud
- Mud with low resistivity (correct)
- Mud with medium resistivity
Why do highly resistive muds adversely affect laterologs?
Why do highly resistive muds adversely affect laterologs?
- Decrease the apparent resistivity (correct)
- Enhance the tool's accuracy
- Increase the true resistivity
- Make the readings inconsistent
How does the Groningen Effect differ from the Delaware Effect in laterologs?
How does the Groningen Effect differ from the Delaware Effect in laterologs?
What thickness of mud is required for LL7 to be unaffected by adjacent beds?
What thickness of mud is required for LL7 to be unaffected by adjacent beds?
How does the invasion depth affect the accuracy of laterolog readings?
How does the invasion depth affect the accuracy of laterolog readings?
What is the purpose of accurate estimates of lithology and porosity in reservoir evaluation?
What is the purpose of accurate estimates of lithology and porosity in reservoir evaluation?
Why is Rw often not a simple parameter to understand or characterize?
Why is Rw often not a simple parameter to understand or characterize?
In the Archie equation, how does an increase in Rw affect calculated Sw?
In the Archie equation, how does an increase in Rw affect calculated Sw?
What effect does a rise in Rw have on calculated Sw according to the Archie equation?
What effect does a rise in Rw have on calculated Sw according to the Archie equation?
Why might reservoirs in SE Asia have widely different salinity in the hydrocarbon leg compared to underlying water?
Why might reservoirs in SE Asia have widely different salinity in the hydrocarbon leg compared to underlying water?
What role does Rw play in the Archie equation and its variants?
What role does Rw play in the Archie equation and its variants?
What is the significance of measuring Rw accurately as the formation water freshens?
What is the significance of measuring Rw accurately as the formation water freshens?
Why is measuring Rw from recovered formation water samples not always ideal?
Why is measuring Rw from recovered formation water samples not always ideal?
How does a small change in salinity at low concentrations affect Rw compared to a similar change at high concentrations?
How does a small change in salinity at low concentrations affect Rw compared to a similar change at high concentrations?
What is the key drawback of establishing Rw from previously measured values in a basin?
What is the key drawback of establishing Rw from previously measured values in a basin?
How can Rw be derived from a static spontaneous potential (SSP)?
How can Rw be derived from a static spontaneous potential (SSP)?
