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| SAGD Development Optimization |
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This section will assist you with development planning for Steam Assisted Gravity Development (SAGD). It demonstrates how have constrained production on oil handling as well as steam production, and how to shift wells in time in order to fit within these constraints.
Creating the Network
A flow schematic is easily created in WellSpring to represent the field wells and facilities.
Optimization via Constraints
Actual production potential is higher than the facilities can handle, so not all wells can be brought on at the same time. Which wells should we defer, and by how much?
From either the network tab or the data tab, production limits or 'constraints' can be added at each of the facility nodes.
Optimized Scenario
Based on these restraints, WellSpring then re-calculates the model, shifting individual wells in time in order to meet the constraints. After the optimization, the field is producing within the facility constraints.
Results - Incremental Scenario Comparison
This model can then be used to compare Steam Oil Rates (SOR) sensitivities. We can create a second scenario with an SOR of 3.2 (32,000 Bbl/d steam) and then compare the production and economics with the original SOR 3.2 case. The plot below show the SOR 3.2 case subtracted from the SOR 3.4 case. Steam requirements are accelerated, as is oil production.
Within the respective capital and operating costs entered for these scenarios, an incremental comparison of the economics can be calculated to evaluate the alternatives.
See also