Electrical Resistivity Logging is a type of downhole survey that uses electrical currents to measure the resistivity of the rock and fluid in the wellbore. The ERV tool is lowered into the wellbore on a wireline or conveyed on a drilling assembly, and it sends electrical currents into the rock and fluid in the wellbore. The electrical resistivity of the rock and fluid is then measured and recorded.
What Does Electrical Resistivity Logging Measure?
Electrical Resistivity Logging measures the electrical resistivity of the rock and fluid in the wellbore. Electrical resistivity is a measure of the resistance to the flow of an electrical current through the rock and fluid.
Resistivity of Rock Formation
Electrical Resistivity Logging can measure the electrical resistivity of the rock formation, which can be used to identify the type of rock and to estimate the porosity and fluid saturation of the rock.
Fluid identification
Electrical Resistivity Logging can be used to identify the type of fluid present in the rock formation, such as oil, gas or water, based on the variations of resistivity in the wellbore.
Saturation
Electrical Resistivity Logging can measure the fluid saturation of the rock formation which is important for reservoir characterization and production optimization.
Formation resistivity
Electrical Resistivity Logging can measure the formation resistivity which is a crucial parameter for determining the presence of hydrocarbons, water, and other fluids in the formation.
Well integrity check
Electrical Resistivity Logging can be used to evaluate the condition of the well and detect any signs of fluid influx or fluid leakage, which can cause well integrity issues.
Production optimization
Electrical Resistivity Logging can be used to measure fluid saturation and fluid identification, which are important for the production of oil and gas.
What Is The Electrical Resistivity Logging Used For?
Electrical Resistivity Logging is used for a variety of purposes in the oil and gas industry, such as:
