Changes

[[:file:applying-gravity-in-petroleum-exploration_fig15-17.png|Figure 6]] shows an example of a borehole gravity tool that succeeded where conventional open-hole and cased-hole logging methods had failed. In the upper part of the log, the gamma-gamma density log underestimates the gas saturation by about 15%. In the lower part of the log, wash-out zones are dominant, affecting the gamma-gamma log but not the BHGM log. Over these intervals, borehole gravity gives a more reliable and higher overall density measurement. The reservoir was fractured at [[length::853 m]], and a normally tight reservoir started to produce gas. The second BHGM logging run shows the lower density of the fractured, gas-filled producing interval. Shallower than [[length::810 m]], both gamma-gamma and BHGM logs agree. The borehole gravity tool was used to measure secondary gas saturation in a fractured limestone reservoir.

[[:file:applying-gravity-in-petroleum-exploration_fig15-17.png|Figure 6]] shows an example of a borehole gravity tool that succeeded where conventional open-hole and cased-hole logging methods had failed. In the upper part of the log, the gamma-gamma density log underestimates the gas saturation by about 15%. In the lower part of the log, wash-out zones are dominant, affecting the gamma-gamma log but not the BHGM log. Over these intervals, borehole gravity gives a more reliable and higher overall density measurement. The reservoir was fractured at [[length::853 m]], and a normally tight reservoir started to produce gas. The second BHGM logging run shows the lower density of the fractured, gas-filled producing interval. Shallower than [[length::810 m]], both gamma-gamma and BHGM logs agree. The borehole gravity tool was used to measure secondary gas saturation in a fractured limestone reservoir.

==See also==

==See also==