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The Gas Plant - Gas Product Configuration is set up so that Gas is the Major Phase. The Plant Shrinkage and NGL yield are both projected on this case, resulting in calculated Sales Gas and NGL volumes. A Gas Plant receives the gas that has already been extracted by individual wells. This gas contains many impurities that make it unfit for commercial use, so the Gas Plant must purify the gas before shipping it out. Because a Gas Plant receives gas from several different wells, it can often be represented as a group case. The operating cost for the Gas Plant will be allocated among the individual wells based on their profitability. However, the Gas Plant can also sell some of the products (ex: propane, butane, etc.) that it extracts from the gas to offset this cost.The Shrinkage in this process occurs as the gas enters the plant, goes through the plant itself (removing impurities/by products), and as the gas exits the plant.
What Default Products Are in the Gas Plant Configuration?
Projected products To set this up, Gas, NGL Yield, and Plant Shrink will be scheduled into the future as a rate/time projection. The projection can be forecasted on the graph using Arps, SEDM, other types of decline curves, or the future monthly volumes can be directly inputted as a scheduled projection. The rates for NGL Yield and Plant Shrink can be inputted as a flat values or it can be projected to change over time. The best way to input a flat rate is by using a flat projection segment. All Projected products are: •Gas (major phase) - Must project this product. •NGL Yield - The rate for NGL Yield can be inputted as a flat value or it can be projected to change over time. The best way to input a flat rate is by using a flat projection segment. •Plant Shrink - The rate for Plant Shrink can be inputted as a flat value or it can be projected to change over time. The best way to input a flat rate is by using a flat projection segment.
Calculated products Once the projections for Gas, NGL Yield, and Plant Shrink are set up, Sales Gas and NGL are calculated based on those values using formulas. Historical values for Sales Gas and NGL can still be inputted/scheduled in the Monthly History form. Calculated products & their formula definitions: •SalesGas = Gas * PlantShrink (SalesGasYield) •NGL = SalesGas * NGLYield |
How Do I Create a Standalone Gas Plant Case?
1.Create a new case if it is not already built to model the Gas Plant. 2.Go to the Projection Ribbon and change the Phase Configuration to Gas Plant. 3.Go to the Graph to input the projections. If there isn't a graph open, go to the Graphs flyout and double-click on the name of a graph to display it in the view. 4.On the Graphs, double-click on the empty graph to add products. Double-click on a product in the Products pane on the left to add it to the graph. A maximum of six products can be displayed at the same time on the graph. Drag and drop the products from the available list on the left onto the section on the right. Make sure to display at least Gas, NGL Yield, and Plant Shrinkage - these are the products to project. Also display Sales Gas and NGL to view the resulting values as the projections are updated for the other products. (SalesGas = Gas * PlantShrink, NGL = SalesGas * NGLYield) 5.Go to the Projection ribbon and create forecasts for Gas, NGL Yield, and Plant Shrinkage. For more information, see how to create projections on the graph. |
How Do I Create a Gas Plant Unit from a Group of Wells?
1.In V3, a Gas Plant unit is set up using a projection unit. 2.Create a new Projection Unit Economic Group Case if it is not already built: In the Home Ribbon, click Add/Import, select Economic Group Case and then select Projection Unit. 3.Select the cases for the Gas Plant by dragging them from the Case List into the bottom of the Case Settings form where it says Cases. Click Compile to gather the required volumes. 4.Go to the Projection Ribbon and change the Phase Configuration to Gas Plant. Remember to edit the General Info form to provide appropriate information for the Projection Unit set up. 5.Go to the Graph to input the projections. If there isn't a graph open, go to the Graphs flyout and double-click on the name of a graph to display it in the view. 6.On the Graphs, double-click on the empty graph to add products. Double-click on a product in the Products pane on the left to add it to the graph. A maximum of six products can be displayed at the same time on the graph. Drag and drop the products from the available list on the left onto the section on the right. Make sure to display at least Gas, NGL Yield, and Plant Shrinkage - these are the products to project. Also display Sales Gas and NGL to view the resulting values as the projections are updated for the other products. (SalesGas = Gas * PlantShrink, NGL = SalesGas * NGLYield) 7.Go to the Projection ribbon and create forecasts for Gas, NGL Yield, and Plant Shrinkage. Sales Gas and NGLare calculated from these values per the formulas above. For more information, see how to create projections on the graph |