DataCard (Gas Material Balance)

With this feature...	Do this...
	Click to print the data displayed in the current tab.
	Click to select the next item that appears in the Gas Material Balance tab. This option isn't available when Group Wells ( ) is enabled.
Method	Select either a linear or parabolic equation for estimation. The classic straight line is commonly used in medium and high permeability, normally pressured gas reservoirs. For parabolic equations, an upward curvature demonstrates additional tight gas contribution from adjacent tight rock, or pressure support associated with a strong water drive. A non-linear downward trend demonstrates formation compaction or unaccounted-for well production.
Source	Select the gas analysis source with which to perform the material balance. The different sources appear on the DataCard Gas Analysis/Pressure tab.
Left Estimation Bound	Drag the line on the graph to the right to exclude P/Z points associated with early production.
Right Estimation Bound	Drag the line on the graph to the left to exclude P/Z points associated with late production.
Abandonment P/Z	Drag the horizontal Abandonment P/Z line up to estimate the expected cumulative gas and recovery. To enter an exact abandonment P/Z, click the numerical Abandonment P/Z value that appears on the left of the chart, type the value, and then press ENTER.
Copy	Right-click and select Copy to paste the P/Z plot into a third-party application.

Click to print the data displayed in the current tab.

Click to select the next item that appears in the Gas Material Balance tab. This option isn't available when Group Wells (

) is enabled.

Method

Select either a linear or parabolic equation for estimation. The classic straight line is commonly used in medium and high permeability, normally pressured gas reservoirs. For parabolic equations, an upward curvature demonstrates additional tight gas contribution from adjacent tight rock, or pressure support associated with a strong water drive. A non-linear downward trend demonstrates formation compaction or unaccounted-for well production.

Source

Select the gas analysis source with which to perform the material balance. The different sources appear on the DataCard Gas Analysis/Pressure tab.

Left Estimation Bound

Drag the line on the graph to the right to exclude P/Z points associated with early production.

Right Estimation Bound

Drag the line on the graph to the left to exclude P/Z points associated with late production.

Abandonment P/Z

Drag the horizontal Abandonment P/Z line up to estimate the expected cumulative gas and recovery. To enter an exact abandonment P/Z, click the numerical Abandonment P/Z value that appears on the left of the chart, type the value, and then press ENTER.

Copy

Right-click and select Copy to paste the P/Z plot into a third-party application.