Name three main physical properties of rocks logged by wirelines.

Name three main physical properties of rocks logged by wirelines.

• A. Electrical, Nuclear, Acoustic
• B. Magnetic, Thermal, Optical
• C. Viscosity, Density, Porosity
• D. Hardness, Elasticity, Toughness

Answer: (A)

Wireline logs characterize rocks in the borehole by probing three broad physical property types: electrical, nuclear, and acoustic. Electrical property logs measure how well the rock conducts electricity, revealing resistivity and conductivity that change with porosity and fluid saturation. Nuclear property logs use radioactive sources to assess hydrogen content, providing porosity information through neutron and related measurements. Acoustic property logs measure the speed of sound through the formation (P-wave velocity), which depends on rock stiffness and porosity and helps identify lithology and fractures. Together, these three families of measurements give insights into porosity, fluid content, and lithology, which is why they are the primary properties logged in wireline surveys.

Wireline logs characterize rocks in the borehole by probing three broad physical property types: electrical, nuclear, and acoustic. Electrical property logs measure how well the rock conducts electricity, revealing resistivity and conductivity that change with porosity and fluid saturation. Nuclear property logs use radioactive sources to assess hydrogen content, providing porosity information through neutron and related measurements. Acoustic property logs measure the speed of sound through the formation (P-wave velocity), which depends on rock stiffness and porosity and helps identify lithology and fractures. Together, these three families of measurements give insights into porosity, fluid content, and lithology, which is why they are the primary properties logged in wireline surveys.