Required Well Conditions

Required Well Conditions In Interval To Be Logged

Technique

Casing

Contents

Information Beyond Casing, If Present ?

Natural Gamma (ng)

None, Steel or PVC – Solid or Screen

Air or Water – Clear or Turbid

Yes

Short Normal Resistivity

None or PVC Screen

Clear or Turbid Water

Yes

Long Normal Resistivity

None or PVC Screen

Clear or Turbid Water

Yes

Single Point Resistance (SPR)

None or PVC Screen

Clear or Turbid Water

Yes

Spontaneous Potential (SP)

None or PVC Screen

Clear or Turbid Water

Yes

Magnetic Susceptibility

None, or PVC – Screen or Solid

Air or Water – Clear or Turbid

Yes

Magnetic Field Vector

None, or PVC – Screen or Solid

Air or Water – Clear or Turbid

Yes

Caliper

None, Steel or PVC – Solid or Screen

Air or Water – Clear or Turbid

No

Fluid Temperature

None, Steel or PVC – Solid or Screen

Clear or Turbid Water – Fully Equilibrated

No

Fluid Conductivity

None, Steel or PVC – Solid or Screen

Clear or Turbid Water – Fully Equilibrated

No

Electromagnetic Induction (Formation Conductivity)

None, or PVC – Screen or Solid

Air or Water – Clear or Turbid

Yes

Verticality

None, or PVC – Screen or Solid

Air or Water – Clear or Turbid

No

Full Waveform Sonic

None

Clear or Turbid Water

Yes

Digital Video

None, Steel or PVC – Solid or Screen

Air or Clear Water

No

Borehole Acoustic Televiewer (BHTV)

None, Steel or PVC – Solid or Screen

Clear or Turbid Water

No

Borehole Optical Televiewer (OPTV)

None, Steel or PVC – Solid or Screen

Air or Clear Water

No

Heat Pulse Flowmeter

None, Steel or PVC – Solid or Screen

Clear or Turbid Water – Slow Moving

No

Impeller Flowmeter

None, Steel or PVC – Solid or Screen

Clear or Turbid Water – Fast Moving

No

Induced Polarization (IP)

None or PVC Screen

Clear or Turbid Water

Yes

Borehole Gravity

None, Steel or PVC – Solid or Screen

Air or Water – Clear or Turbid

Yes

Gamma Density (gg)

None, Steel or PVC – Solid or Screen

Air or Water – Clear or Turbid

Yes

Neutron Density

None, Steel or PVC – Solid or Screen

Air or Water – Clear or Turbid

Yes

pH

None, Steel or PVC – Solid or Screen

Clear or Turbid Water – Fully Equilibrated

No

Dissolved Oxygen (O2)

None, Steel or PVC – Solid or Screen

Clear or Turbid Water – Fully Equilibrated

No

Cavity Sonar

None

Clear or Turbid Water

No

Cavity Ultrasound

None

Air

No

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Government

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militry

Military

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private

Private

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historical

Historical

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superfund

Superfund

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