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Line 31:
Line 31: − + − ! Radial Distance for 90% Effect, in − ! Radial Distance for 90% Effect, cm − ! Formation Volume Investigated, ft<sup>3</sup> − ! Formation Volume Investigated, m<sup>3</sup> − + − − − − − + − − − − − + − − − − − + − − − − − + − − − −
Borehole gravity tool (view source)
Revision as of 21:17, 10 November 2014
, 21:17, 10 November 2014→Depth of investigation of various logging methods
{| class = "wikitable"
{| class = "wikitable"
|-
|-
! Logging Method
! Logging Method || Radial Distance for 90% Effect, in || Radial Distance for 90% Effect, cm || Formation Volume Investigated, ft<sup>3</sup> || Formation Volume Investigated, m<sup>3</sup>
|-
|-
| Conventional 5.25-in. (13-cm) core
| Conventional 5.25-in. (13-cm) core || 2.6 || 6.6 || 1.5 || 0.04
| 2.6
| 6.6
| 1.5
| 0.04
|-
|-
| Gamma-gamma log
| Gamma-gamma log || 8 || 20 || 17 || 0.5
| 8
| 20
| 17
| 0.5
|-
|-
| Neutron log
| Neutron log || 14 || 36 || 40 || 1.1
| 14
| 36
| 40
| 1.1
|-
|-
| Sonic log
| Sonic log || 18 || 46 || 59 || 1.7
| 18
| 46
| 59
| 1.7
|-
|-
| Borehole gravity log
| Borehole gravity log || 600 || 1,500 || 78,532 || 2,224
| 600
| 1,500
| 78,532
| 2,224
|}
|}