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Line 48: − − [[file:drive-mechanisms-and-recovery_fig1.png|left|thumb|{{figure_number|1}}Reservoir pressure trends by drive mechanism.]] − − [[file:drive-mechanisms-and-recovery_fig2.png|thumb|{{figure_number|2}}Producing gas-oil ratio trends by drive mechanism.]]
Drive mechanisms and recovery (view source)
Revision as of 15:03, 13 March 2014
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[[file:drive-mechanisms-and-recovery_fig1.png|thumb|{{figure_number|1}}Reservoir pressure trends by drive mechanism.]]
[[file:drive-mechanisms-and-recovery_fig2.png|thumb|{{figure_number|2}}Producing gas-oil ratio trends by drive mechanism.]]
The natural energy of a reservoir can be used to move oil and gas toward the wellbore. Used in such a fashion, these sources of energy are called ''drive mechanisms''. Early determination and characterization of the drive mechanism(s) present within a reservoir may allow a greater ultimate recovery of hydrocarbons. Drive mechanisms are determined by the analysis of historical production data, primarily reservoir pressure data and fluid production ratios.
The natural energy of a reservoir can be used to move oil and gas toward the wellbore. Used in such a fashion, these sources of energy are called ''drive mechanisms''. Early determination and characterization of the drive mechanism(s) present within a reservoir may allow a greater ultimate recovery of hydrocarbons. Drive mechanisms are determined by the analysis of historical production data, primarily reservoir pressure data and fluid production ratios.
==Solution gas drive==
==Solution gas drive==
In a solution (or dissolved) gas drive reservoir, the oil-bearing rock is completely surrounded by impermeable barriers. As the reservoir pressure drops during production, expansion of the oil and its dissolved gas provides most of the reservoir's drive energy ([[:File:Drive-mechanisms-and-recovery_fig3.png|Figure 3]]). Additional energy is obtained from the expansion of the rock and its associated water.
In a solution (or dissolved) gas drive reservoir, the oil-bearing rock is completely surrounded by impermeable barriers. As the reservoir pressure drops during production, expansion of the oil and its dissolved gas provides most of the reservoir's drive energy ([[:File:Drive-mechanisms-and-recovery_fig3.png|Figure 3]]). Additional energy is obtained from the expansion of the rock and its associated water.