Case Studies

Network schematics

Strategic Permian demo network.

Strategic toy case study network.

Strategic small case study network.

Strategic treatment demo network.

Strategic model network developed for use in PARETO workshops.

Comparison table

	Strategic Permian demo	Strategic toy case study	Strategic small case study	Strategic treatment demo	Strategic surrogate demo	Strategic workshop baseline	Operational case study
Input file	strategic_permian_demo.xlsx	strategic_toy_case_study.xlsx	strategic_small_case_study.xlsx	strategic_treatment_demo.xlsx	strategic_treatment_demo_surrogates.xlsx	workshop_baseline_all_data.xlsx	operational_generic_case_study.xlsx
Model type	Strategic	Strategic	Strategic	Strategic	Strategic	Strategic	Operational
Description	A representative example of a Permian system. Nearly identical to treatment demo, but with reduced CAPEX options.	A very small, toy-sized network. Useful for testing and debugging.	Larger network, but “small” in the sense that disposal and pipeline expansion are not allowed, so the model solves quickly.	Larger network, and disposal and pipeline expansion are allowed. Takes a bit longer to solve. This can be seen as the “default” case study for the strategic model.	Same as strategic treatment demo, but allows for the option (but not the requirement) to use surrogate models for desalination sites (MD and MVC).	Network developed for use in PARETO workshops. Solves quickly.	Generic case study for the operational model. Note that this case study cannot currently be run in PARETO UI - it can only be run using the Python command line interface.
Decision period	Week	Week	Week	Week	Week	Week	Day
Decision horizon	52 weeks	52 weeks	52 weeks	52 weeks	52 weeks	10 weeks	5 days
Network nodes	28	9	28	28	28	9	0
Production pads	14	4	15	14	14	4	5
Production tanks	N/A	N/A	N/A	N/A	N/A	N/A	14
Completions pads	3	1	4	3	3	2	1
External completions pads [1]	1 (CP03)	0	0	1 (CP03)	1 (CP03)	1 (CP02)	N/A
Disposal sites (SWD)	5	2	3	5	5	2	2
Disposal expansion allowed? [2]	Yes, for K03 and K05	No	No	Yes, for K03 and K05	Yes, for K03 and K05	No	No
Storage sites	3	3	2	3	3	3 Only one storage site (S02) is shown in the above schematic and used in the workshop baseline scenario. Two additional storage sites (S03 and S04) are unused in the baseline scenario, but are included in the input file so they can used in the beneficial reuse scenario (which builds off of the baseline scenario).	0
Storage expansion allowed?	Yes	Yes	No	Yes	Yes	Yes	No
Completions pad storage?	No	No	Yes	No	No	No	Yes
Treatment sites	4 Non-desalination sites: R02, R04, R05 Desalination sites: R03 All sites have zero initial treatment capacity	2 Non-desalination site: R02 Desalination site: R01 Both sites have zero initial treatment capacity	2 Both are non-desalination sites Both sites have nonzero initial treatment capcity	6 Non-desalination sites: R02, R04, R05 Desalination sites: R01, R03, R06 All sites have zero initial treatment capacity	6 Non-desalination sites: R02, R04, R05 Desalination sites: R01, R03, R06 All sites have zero initial treatment capacity	2 Non-desalination site: R02 Desalination site: R01 Both sites have zero initial treatment capacity	2
Treatment technologies	Non-desalination: CB, CB-EV Desalination: FF	Non-desalination: CB, CB-EV Desalination: MVC, MD, OARO	Non-desalination: CB	Non-desalination: CB, CB-EV Desalination: FF, HDH	Non-desalination: CB, CB-EV Desalination (simple): FF, HDH Desalination (surrogate): MVC, MD	Non-desalination: CB, CB-EV Desalination: MVC, MD	N/A
Treatment expansion allowed?	Yes	Yes	Yes (but only one capacity option)	Yes	Yes	Yes	No
Pipeline expansion allowed?	Yes	Yes	No	Yes	Yes	Yes	No
Hydraulics settings	Roughness factor: 110 Head loss: 0.03	Roughness factor: 110 Head loss: 0.03	Roughness factor: 110 Head loss: 0.03	Roughness factor: 110 Head loss: 0.03	Roughness factor: 110 Head loss: 0.03	Roughness factor: 110 Head loss: 0.03	N/A
Economics	Discount rate: 8% CAPEX lifetime: 20 years	Discount rate: 8% CAPEX lifetime: 20 years	Discount rate: 8% CAPEX lifetime: 20 years	Discount rate: 8% CAPEX lifetime: 20 years	Discount rate: 8% CAPEX lifetime: 20 years	Discount rate: 8% CAPEX lifetime: 20 years	N/A
Notes	Recommend solving with Gurobi, or with >15min runtime with CBC.			Recommend solving with Gurobi.	Recommend solving with Gurobi.

[1]

In the strategic model, external completions pads can be used to model opportunities for water sharing outside of the main network.

[2]

In the strategic model, disposal capacity expansion is only allowed for SWD sites for which the initial disposal capacity is 0.

Abbreviations

• CB: Clean brine treatment

• CB-EV: Clean brine treatment with enhanced evaporation

• FF: Falling film evaporation

• HDH: Humidification-dehumidification

• MD: Membrane distillation

• MVC: Mechanical vapor compression

• OARO: Osmotically assisted reverse osmosis

• SWD: Salt water disposal