WIRELINE 3(WIRELINE LOGGING)


Wireline logging can address questions about:
           Mechanical condition of the well.
          Fluid movement between zones.
          Design and evaluation of stimulation treatment.
          Reservoir management.
 
Collar Locator
        It shows the location of casing collars, where the  thickness is high.
        It is run with perforating guns or plugs.
        In a magnetic CCL, when the unit moves through collar, the increase in metal thickness disturbs the magnetic field and causes a blip to be recorded.
Temperature devices
       The thermometer uses an electrical bridge with an exposed sensing  wire as the fourth arm.
        Temperature is affected by heat flow and fluid expansion.
        Temperature log may be run under either dynamic and static conditions.


Spinner Flowmeter

 
       Based on propeller movement.
        Rotation rate and direction are determined.
Gradiomanometer
       Gradiomanometer is based on pressure measurement at two fixed points.
        Good for identifying gas entry point and locating standing water levels.
        It can also be used to calculate water hold up.


Noise devices
       Noise log is a recording at various points in the well of the amplitude of the noise generated by moving liquid or gas using an assembly of microphone, amplifier and a speaker.
Caliper
       Measures any change in the borehole due to solid deposition.
        Multi-arm caliper can measure metal loss due to corrosion or erosion.
        They can be used in openhole completions.
Combination Tool
       CCL.
        Thermometer.
        Manometer.
        Caliper.
        Gradiomanometer.
        Flow meter.
Cement Evaluation Tool  (CEV)
       For identifying mud channels.
        Consists of 8 ultra sonic transducers arranged helically over 2 ft.
        Each transducers in turn transmits a signal, then measure the signal decay rate.
        Sonic decay rate is related to the compressive strength of the material around the casing.