Well Logging Lab – MCQs 50 Score: 0 Attempted: 0/50 Subscribe 1. Well logging is primarily used to determine: (A) Drilling mud properties (B) Subsurface rock and fluid properties (C) Refining efficiency (D) Offshore structure design 2. The measurement of natural gamma radiation in formations is performed by: (A) Resistivity log (B) Gamma ray log (C) Density log (D) Sonic log 3. High gamma ray readings usually indicate: (A) Clean sandstone (B) Shale presence (C) High porosity (D) Gas saturation 4. Which log is used to determine porosity? (A) Gamma ray log (B) Density log (C) Spontaneous potential log (D) Resistivity log 5. Sonic log measures: (A) Formation resistivity (B) Velocity of sound through formation (C) Formation density (D) Gamma radiation 6. Resistivity log is mainly used to identify: (A) Hydrocarbon-bearing zones (B) Shale content (C) Porosity (D) Permeability 7. Low resistivity in a formation usually indicates: (A) Hydrocarbons (B) Water saturation (C) High porosity (D) Gas zones 8. The spontaneous potential (SP) log records: (A) Formation acoustic velocity (B) Natural electrical potentials (C) Gamma rays (D) Hydrocarbon density 9. SP logs are most useful for identifying: (A) Gas zones (B) Permeable formations and bed boundaries (C) Rock density (D) Shale content 10. Neutron logs respond primarily to: (A) Formation density (B) Hydrogen content (porosity) (C) Resistivity (D) Sonic velocity 11. Cross-plotting density and neutron logs helps identify: (A) Shale volume (B) Lithology and gas presence (C) Water saturation (D) Wellbore stability 12. In clean sandstone, density porosity and neutron porosity usually: (A) Match closely (B) Diverge greatly (C) Show negative values (D) Remain constant at zero 13. Caliper log measures: (A) Borehole diameter (B) Formation porosity (C) Formation resistivity (D) Gamma radiation 14. The main purpose of a caliper log is: (A) Porosity estimation (B) Borehole condition monitoring (C) Resistivity evaluation (D) Oil density measurement 15. Which of the following is NOT a primary well log type? (A) Gamma ray log (B) Sonic log (C) Mud balance log (D) Resistivity log 16. Dipmeter logs are used to determine: (A) Formation porosity (B) Dip angle and direction of beds (C) Permeability (D) Water saturation 17. The Archie equation relates resistivity to: (A) Porosity and water saturation (B) Sonic velocity and density (C) API gravity and viscosity (D) Capillary pressure and wettability 18. In well logging, API units are used for: (A) Gamma ray log readings (B) Oil density (C) Resistivity (D) Sonic travel time 19. Which log is most useful for lithology identification? (A) Gamma ray log (B) Density log (C) Resistivity log (D) SP log 20. Cement bond log (CBL) is used to evaluate: (A) Porosity (B) Cement integrity around casing (C) Resistivity (D) Permeability 21. A sharp drop in resistivity indicates: (A) Gas zone (B) Water-bearing formation (C) Tight rock (D) Hydrocarbon saturation 22. Microresistivity logs are designed to: (A) Measure borehole diameter (B) Resolve thin beds and flushed zones (C) Detect fractures (D) Record gamma radiation 23. The main function of borehole compensation in sonic logging is: (A) Reduce mud noise (B) Correct for borehole size and mud effects (C) Eliminate shale content (D) Increase logging speed 24. Which log provides the best indication of gas presence when cross-plotted with density? (A) SP log (B) Neutron log (C) Caliper log (D) Dipmeter log 25. Shale volume can be estimated using: (A) SP log (B) Gamma ray log (C) Density log (D) Sonic log 26. NMR (Nuclear Magnetic Resonance) logs measure: (A) Capillary pressure (B) Pore size distribution and fluid types (C) Gamma radiation (D) Sonic velocity 27. Deep resistivity tools measure: (A) Mud filtrate zone (B) Formation beyond invasion zone (C) Shale volume (D) Borehole size 28. Well logging data is usually presented in: (A) Cross-sections (B) Log curves vs. depth (C) Isometric diagrams (D) Histograms 29. Shale baseline in SP logs is usually: (A) Flat and stable (B) Highly variable (C) Negative only (D) Positive only 30. Formation water resistivity is denoted as: (A) Rw (B) Rt (C) Ro (D) Sw 31. The resistivity of formation fully saturated with water is: (A) Rt (B) Ro (C) Rw (D) Ri 32. The invaded zone resistivity is measured as: (A) Rt (B) Rxo (C) Ro (D) Rw 33. Cement bond logs use: (A) Acoustic energy (B) Gamma rays (C) Electrical resistivity (D) Neutrons 34. Which property is best estimated using neutron-density combination? (A) Shale volume (B) Lithology and porosity (C) Formation resistivity (D) Wellbore stability 35. What does a high-density log reading indicate? (A) High porosity (B) Low porosity (C) High permeability (D) Gas presence 36. The unit of sonic log travel time is: (A) ms/ft (B) cP (C) API (D) ohm-m 37. Which well log is most commonly used to identify coal beds? (A) Gamma ray log (B) Density log (C) Neutron log (D) Sonic log 38. Dipmeter logs require: (A) Multiple electrodes (B) Neutron detectors (C) Gamma ray detectors (D) Acoustic transducers 39. Formation evaluation using logs mainly estimates: (A) Oil reserves (B) Porosity, lithology, and saturation (C) Cement strength (D) API gravity 40. Mudcake effect is corrected using: (A) Caliper log (B) Borehole-compensated logs (C) SP log (D) Cement bond log 41. In well logging, “kick-off” refers to: (A) Casing setting depth (B) Depth of directional deviation (C) Resistivity cut-off value (D) Shale volume calculation 42. Which log is commonly run in open hole immediately after drilling? (A) Gamma ray log (B) Cement bond log (C) Caliper log (D) Dipmeter log 43. Neutron porosity logs may give false high readings in: (A) Gas-bearing formations (B) Water-bearing zones (C) Oil zones (D) Shale formations only 44. The depth correlation between logs is achieved using: (A) Caliper data (B) Casing collar locator (C) SP curve (D) Mud logs 45. A dual induction log is primarily used for: (A) Shallow resistivity measurement (B) Deep resistivity measurement in conductive mud (C) Borehole diameter measurement (D) Gamma ray detection 46. Lithology identification using logs relies mainly on: (A) Gamma, density, and neutron logs (B) Resistivity and SP logs (C) Cement bond logs (D) Caliper logs only 47. Hydrocarbon saturation can be estimated using: (A) Archie’s equation with resistivity logs (B) Gamma ray logs only (C) Caliper logs (D) Cement bond logs 48. Which log is least affected by borehole diameter variations? (A) Sonic log (B) Density log (C) Neutron log (D) Gamma ray log 49. A neutron-density crossover is a classic indicator of: (A) Gas zone (B) Shale content (C) Water saturation (D) Cement failure 50. Well logging labs primarily train students in: (A) Core flooding (B) Interpretation of subsurface properties from log data (C) Mud rheology testing (D) PVT analysis 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