Well Logging and Formation Evaluation – MCQs 50 Score: 0 Attempted: 0/50 Subscribe 1. The main objective of well logging is to: (A) Measure drilling fluid properties (B) Evaluate subsurface formation properties (C) Design drilling rigs (D) Test casing strength 2. Spontaneous potential (SP) log measures: (A) Formation porosity (B) Natural electrical potential between borehole and formation (C) Formation density (D) Hydrocarbon saturation 3. A resistivity log is primarily used to: (A) Determine lithology (B) Estimate hydrocarbon saturation (C) Measure borehole diameter (D) Evaluate mud cake 4. The neutron log mainly responds to: (A) Hydrogen content in formation (B) Formation density (C) Borehole salinity (D) Electrical resistivity 5. Density log provides information about: (A) Formation porosity (B) Borehole diameter (C) Gas saturation (D) Permeability 6. Sonic log measures: (A) Electrical current (B) Travel time of acoustic waves in formation (C) Gas compressibility (D) Borehole inclination 7. Gamma ray log is mainly used to: (A) Identify shale and clean formations (B) Measure porosity (C) Estimate oil viscosity (D) Evaluate cement quality 8. A caliper log is used for: (A) Borehole diameter measurement (B) Formation porosity (C) Hydrocarbon saturation (D) Resistivity correction 9. The SP log is typically recorded in: (A) Oil-based mud (B) Freshwater-based mud (C) Gas drilling only (D) Cemented holes 10. Resistivity of hydrocarbon-bearing zones is usually: (A) Higher than water-bearing zones (B) Lower than water-bearing zones (C) Same as water zones (D) Independent of saturation 11. Archie’s equation is used to determine: (A) Permeability (B) Water saturation (C) Porosity (D) Formation thickness 12. In Archie’s equation, the parameter “a” is: (A) Lithology factor (B) Tortuosity factor (C) Porosity exponent (D) Cementation exponent 13. Cement bond log (CBL) is used to evaluate: (A) Wellbore inclination (B) Bonding quality between casing and cement (C) Formation resistivity (D) Gas saturation 14. Microresistivity logs are mainly used to: (A) Measure deep formation resistivity (B) Investigate mud-filtrate invaded zones (C) Measure borehole temperature (D) Estimate formation thickness 15. Neutron-density crossplots are used to: (A) Detect hydrocarbons (gas effect) (B) Measure resistivity (C) Estimate cement bond (D) Record SP curves 16. Which log is most effective for detecting gas zones? (A) SP log (B) Neutron-density combination log (C) Gamma ray log (D) Caliper log 17. Which log is most useful for lithology identification? (A) Resistivity log (B) Gamma ray log (C) Neutron log (D) Cement bond log 18. The mud cake thickness can be estimated from: (A) SP log (B) Caliper log (C) Neutron log (D) Resistivity log 19. NMR (Nuclear Magnetic Resonance) logging provides: (A) Permeability and fluid typing (B) Formation resistivity (C) Borehole size (D) Lithology only 20. The density of the formation is usually measured in: (A) g/cm³ (B) ohm-m (C) cps (D) ft/s 21. Shale has a high reading on which log? (A) Resistivity log (B) Gamma ray log (C) Density log (D) Sonic log 22. Effective porosity excludes: (A) Primary porosity (B) Secondary porosity (C) Non-connected pore space (D) Intergranular pore space 23. Water saturation in clean sandstone can be estimated using: (A) Archie’s equation (B) Gamma ray log (C) Caliper log (D) Cement bond log 24. Resistivity logging is less effective in: (A) Oil reservoirs (B) Gas reservoirs (C) Freshwater formations (D) Highly saline water formations 25. A crossover effect between density and neutron logs usually indicates: (A) Gas-bearing zone (B) Oil-bearing zone (C) Shale (D) Water-bearing zone 26. Shaly sands can cause errors in: (A) Archie’s water saturation estimation (B) Caliper readings (C) Borehole inclination (D) Cement bond evaluation 27. The SP curve in clean sandstone usually shows: (A) Deflection toward the shale baseline (B) Deflection away from the shale baseline (C) No deflection (D) Random oscillations 28. Borehole enlargement is usually identified using: (A) SP log (B) Caliper log (C) Resistivity log (D) Sonic log 29. A cement evaluation tool (CET) is an advanced form of: (A) Neutron log (B) Density log (C) Cement bond log (D) Caliper log 30. The hydrocarbon saturation (Sh) is given by: (A) 1 – Sw (B) Sw ÷ porosity (C) Resistivity ÷ porosity (D) Archie’s m exponent 31. The logging tool that measures natural radioactivity is: (A) Sonic log (B) Gamma ray log (C) SP log (D) Resistivity log 32. Photoelectric effect (PEF) log helps in: (A) Lithology identification (B) Porosity estimation (C) Hydrocarbon typing (D) Mud invasion studies 33. A typical resistivity tool response is reported in: (A) ohm-m (B) cps (C) g/cm³ (D) ppg 34. A thick mud cake will: (A) Increase SP deflection (B) Reduce invasion depth (C) Improve hydrocarbon saturation (D) Eliminate caliper readings 35. Gas shows a lower reading on: (A) Density log (B) Neutron log (C) Gamma ray log (D) Caliper log 36. The tool that can operate in cased hole logging is: (A) Gamma ray log (B) Resistivity log (C) Sonic log (D) Neutron-density log 37. Deep resistivity log readings are more representative of: (A) Invaded zone (B) Uninvaded formation zone (C) Mud cake (D) Borehole diameter 38. Which property is not directly measured by well logging tools? (A) Porosity (B) Resistivity (C) Permeability (D) Lithology 39. Dual induction log is mainly used in: (A) Air-drilled wells (B) Oil-based mud (C) Freshwater-based mud (D) Highly deviated wells 40. Well logging is usually carried out: (A) During drilling only (B) After casing and cementing (C) While or after drilling open hole (D) Only at abandonment 41. Wireline logging refers to: (A) Logging using continuous cable (B) Mud logging (C) Core analysis (D) Drill cuttings analysis 42. LWD stands for: (A) Logging While Drilling (B) Low Well Depth (C) Load Weight Determination (D) Logging Wireline Data 43. A neutron log in gas zones typically shows: (A) Overestimated porosity (B) Underestimated porosity (C) No change (D) Very high density 44. Effective porosity can be best determined using: (A) NMR log (B) SP log (C) Gamma ray log (D) Caliper log 45. The mud invasion effect is most significant for: (A) Resistivity logs (B) Gamma ray logs (C) Caliper logs (D) Sonic logs 46. The gamma ray API unit is defined relative to: (A) A standard shale formation (B) A sandstone formation (C) Water-filled borehole (D) Air-filled borehole 47. Dipmeter logs are used for: (A) Formation dip and structure analysis (B) Porosity estimation (C) Water saturation (D) Lithology identification 48. SP deflection direction depends mainly on: (A) Mud filtrate salinity vs formation water salinity (B) Formation resistivity only (C) Borehole diameter (D) Gas saturation 49. Cased hole logging tools include: (A) Gamma ray and cement bond log (B) SP log (C) Caliper log (D) Density log 50. Formation evaluation integrates: (A) Core data, well logs, and test data (B) Mud logging only (C) Seismic data only (D) Drilling fluid properties FOUNDATIONAL SUBJECTS (Year 1 – Year 2)Engineering Mechanics (Statics & Dynamics) – MCQsFluid Mechanics – MCQsThermodynamics – MCQsComputer Programming (e.g., MATLAB, Python) – MCQsIntroduction to Engineering – MCQsGeology for Engineers – MCQsTechnical Communication – MCQs CORE PETROLEUM ENGINEERING SUBJECTS (Year 2 – Year 4)Introduction to Petroleum Engineering – MCQsPetroleum Geology – MCQsDrilling Engineering – MCQsReservoir Engineering – MCQsProduction Engineering – MCQsPetroleum Fluid Properties – MCQsWell Logging and Formation Evaluation – MCQsPetroleum Economics – MCQsPetroleum Refining and Processing – MCQs Natural Gas Engineering – MCQsEnhanced Oil Recovery (EOR) – MCQsWell Testing – MCQsReservoir Simulation – MCQsDrilling Fluids and Cementing – MCQsOffshore Petroleum Engineering – MCQsHealth, Safety and Environment (HSE) – MCQsPetroleum Project Management – MCQsCorrosion Engineering – MCQsArtificial Lift Techniques – MCQsPetrophysics – MCQs LABORATORIES & PRACTICALS (Theory-based MCQs can be made from these)Drilling Fluids Lab – MCQsCore Analysis Lab – MCQsReservoir Simulation Lab – MCQsRock and Fluid Properties Lab – MCQsWell Logging Lab – MCQs ELECTIVES (Optional/Advanced)Energy Transition and Sustainability – MCQsUnconventional Resources (Shale, Tight Gas, etc.) – MCQsData Analytics in Petroleum Engineering – MCQsGeographic Information Systems (GIS) – MCQsPetroleum Law and Policy – MCQsPipeline Engineering – MCQsRenewable Energy Integration – MCQs