2025 Geothermal Drilling Cost Curves Update [v3.8.6]

.bumpversion.cfg

@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.8.4
+current_version = 3.8.6
 commit = True
 tag = True
 

.cookiecutterrc

@@ -54,7 +54,7 @@ default_context:
     sphinx_doctest: "no"
     sphinx_theme: "sphinx-py3doc-enhanced-theme"
     test_matrix_separate_coverage: "no"
-    version: 3.8.4
+    version: 3.8.6
     version_manager: "bump2version"
     website: "https://github.com/NREL"
     year_from: "2023"

CHANGELOG.rst

@@ -13,6 +13,12 @@ GEOPHIRES-X (2023-2025)
 Revenue & Cashflow Profile period output aligned with NREL convention used to calculate NPV.
 See https://github.com/NREL/GEOPHIRES-X/discussions/344
 
+3.8.6: Baseline well drilling cost curves updated to NREL's 2025 cost curve update:
+Akindipe, D. and Witter. E. 2025. "2025 Geothermal Drilling Cost Curves Update". https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2025/Akindipe.pdf?t=1740084555.
+
+Intermediate and ideal correlations retain existing values from GeoVision:
+DOE 2019. "GeoVision" p. 163. https://www.energy.gov/sites/prod/files/2019/06/f63/GeoVision-full-report-opt.pdf.
+
 3.7
 ^^^
 

README.rst

@@ -56,9 +56,9 @@ Free software: `MIT license <LICENSE>`__
     :alt: Supported implementations
     :target: https://pypi.org/project/geophires-x
 
-.. |commits-since| image:: https://img.shields.io/github/commits-since/softwareengineerprogrammer/GEOPHIRES-X/v3.8.4.svg
+.. |commits-since| image:: https://img.shields.io/github/commits-since/softwareengineerprogrammer/GEOPHIRES-X/v3.8.6.svg
     :alt: Commits since latest release
-    :target: https://github.com/softwareengineerprogrammer/GEOPHIRES-X/compare/v3.8.4...main
+    :target: https://github.com/softwareengineerprogrammer/GEOPHIRES-X/compare/v3.8.6...main
 
 .. |docs| image:: https://readthedocs.org/projects/GEOPHIRES-X/badge/?style=flat
     :target: https://nrel.github.io/GEOPHIRES-X

docs/conf.py

@@ -18,7 +18,7 @@
 year = '2025'
 author = 'NREL'
 copyright = f'{year}, {author}'
-version = release = '3.8.4'
+version = release = '3.8.6'
 
 pygments_style = 'trac'
 templates_path = ['./templates']

setup.py

@@ -13,7 +13,7 @@ def read(*names, **kwargs):
 
 setup(
     name='geophires-x',
-    version='3.8.4',
+    version='3.8.6',
     license='MIT',
     description='GEOPHIRES is a free and open-source geothermal techno-economic simulator.',
     long_description='{}\n{}'.format(

src/geophires_x/Economics.py

@@ -4,7 +4,8 @@
 import numpy as np
 import numpy_financial as npf
 import geophires_x.Model as Model
-from geophires_x.OptionList import Configuration, WellDrillingCostCorrelation, EconomicModel, EndUseOptions, PlantType
+from geophires_x.OptionList import Configuration, WellDrillingCostCorrelation, EconomicModel, EndUseOptions, PlantType, \
+    _WellDrillingCostCorrelationCitation
 from geophires_x.Parameter import intParameter, floatParameter, OutputParameter, ReadParameter, boolParameter, \
     coerce_int_params_to_enum_values
 from geophires_x.Units import *
@@ -1004,9 +1005,15 @@ def __init__(self, model: Model):
             UnitType=Units.NONE,
             ErrMessage="assume default well drilling cost correlation (10)",
             ToolTipText="Select the built-in well drilling and completion cost correlation: " +
-                        '; '.join([f'{it.int_value}: {it.value}' for it in WellDrillingCostCorrelation])
-        )
+                        '; '.join([f'{it.int_value}: {it.value}'
+                                   for it in WellDrillingCostCorrelation]) +
+                        f'. '
+                        f'Baseline correlations (1-4) are from '
+                        f'{_WellDrillingCostCorrelationCitation.NREL_COST_CURVE_2025.value}.'
+                        f' Intermediate and ideal correlations (6-17) are from '
+                        f'{_WellDrillingCostCorrelationCitation.GEOVISION.value}.'
 
+        )
         self.DoAddOnCalculations = self.ParameterDict[self.DoAddOnCalculations.Name] = boolParameter(
             "Do AddOn Calculations",
             DefaultValue=False,
@@ -1778,18 +1785,25 @@ def __init__(self, model: Model):
             PreferredUnits=PercentUnit.PERCENT,
             CurrentUnits=PercentUnit.PERCENT
         )
+
+        # TODO this is displayed as "Project Net Revenue" in Revenue & Cashflow Profile which is probably not an
+        #   accurate synonym for annual revenue
         self.TotalRevenue = self.OutputParameterDict[self.TotalRevenue.Name] = OutputParameter(
             Name="Annual Revenue from Project",
             UnitType=Units.CURRENCYFREQUENCY,
             PreferredUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR,
             CurrentUnits=CurrencyFrequencyUnit.MDOLLARSPERYEAR
         )
+
+        # TODO this is displayed as "Project Net Cashflow" in Revenue & Cashflow Profile which is probably not an
+        #   accurate synonym for cumulative revenue
         self.TotalCummRevenue = self.OutputParameterDict[self.TotalCummRevenue.Name] = OutputParameter(
             Name="Cumulative Revenue from Project",
             UnitType=Units.CURRENCY,
             PreferredUnits=CurrencyUnit.MDOLLARS,
             CurrentUnits=CurrencyUnit.MDOLLARS
         )
+
         self.ProjectNPV = self.OutputParameterDict[self.ProjectNPV.Name] = OutputParameter(
             "Project Net Present Value",
             UnitType=Units.CURRENCY,

src/geophires_x/GeoPHIRESUtils.py

@@ -252,7 +252,7 @@ def density_water_kg_per_m3(Twater_degC: float, pressure: Optional[PlainQuantity
 
     except (NotImplementedError, ValueError) as e:
         raise ValueError(f'Input temperature & pressure ({Twater_degC}, {pressure}) '
-                         f'are out of range or otherwise could not be used to calculate') from e
+                         f'are out of range or otherwise could not be used to calculate water density.') from e
 
 
 def celsius_to_kelvin(celsius: float) -> float:
@@ -298,7 +298,7 @@ def viscosity_water_Pa_sec(
 
     except (NotImplementedError, ValueError) as e:
         raise ValueError(f'Input temperature & pressure ({Twater_degC}, {pressure}) '
-                         f'are out of range or otherwise could not be used to calculate') from e
+                         f'are out of range or otherwise could not be used to calculate water viscosity.') from e
 
 
 @lru_cache
@@ -334,7 +334,7 @@ def heat_capacity_water_J_per_kg_per_K(
 
     except (NotImplementedError, ValueError) as e:
         raise ValueError(f'Input temperature & pressure ({Twater_degC}, {pressure}) '
-                         f'are out of range or otherwise could not be used to calculate') from e
+                         f'are out of range or otherwise could not be used to calculate heat capacity of water.') from e
 
 
 @lru_cache

src/geophires_x/OptionList.py

@@ -36,7 +36,7 @@ class EndUseOptions(GeophiresInputEnum):
     COGENERATION_PARALLEL_EXTRA_ELECTRICITY = 52, "Cogeneration Parallel Cycle, Electricity sales considered as extra income"
 
     @staticmethod
-    def from_input_string(input_string:str):
+    def from_input_string(input_string: str):
         """
         :rtype: EndUseOptions
         """
@@ -66,7 +66,7 @@ class PlantType(GeophiresInputEnum):
     INDUSTRIAL = 9, "Industrial"
 
     @staticmethod
-    def from_input_string(input_string:str):
+    def from_input_string(input_string: str):
         """
         :rtype: PlantType
         """
@@ -97,7 +97,7 @@ def from_int(int_val):
                 return member
 
     @staticmethod
-    def from_input_string(input_string:str):
+    def from_input_string(input_string: str):
         for member in __class__:
             if input_string == str(member.int_value):
                 return member
@@ -117,7 +117,7 @@ class ReservoirModel(GeophiresInputEnum):
     SBT = 8, "SBT"
 
     @staticmethod
-    def get_reservoir_model_from_input_string(input_string:str):
+    def get_reservoir_model_from_input_string(input_string: str):
         """
         :rtype: ReservoirModel
         """
@@ -148,41 +148,89 @@ def from_int(int_val):
                 return member
 
     @staticmethod
-    def from_input_string(input_string:str):
+    def from_input_string(input_string: str):
         for member in __class__:
             if input_string == str(member.int_value):
                 return member
 
         raise ValueError(f'Unknown Reservoir Volume input value: {input_string}')
 
 
+class _WellDrillingCostCorrelationCitation(str, Enum):
+    """
+    Values are abbreviated citations used in tooltip text.
+    Commented full citations are present in CHANGELOG and could also be used in future documentation.
+    """
+
+    NREL_COST_CURVE_2025 = 'NREL\'s 2025 cost curve update'
+    # ('Akindipe, D. and Witter. E. 2025. '
+    #       '"2025 Geothermal Drilling Cost Curves Update". '
+    #       'https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2025/Akindipe.pdf?t=1740084555')
+
+    SIMPLE = 'Based on Fervo Project Cape cost per meter (~$1846/m)'
+
+    GEOVISION = 'GeoVision'
+    # ('DOE 2019. '
+    #   '"GeoVision" p. 163. '
+    #   'https://www.energy.gov/sites/prod/files/2019/06/f63/GeoVision-full-report-opt.pdf')
+
+
 class WellDrillingCostCorrelation(GeophiresInputEnum):
-    """Note: order must be retained since input is read as an int; first int arg is duplicative of order"""
-
-    VERTICAL_SMALL = 1, "vertical small diameter, baseline", 0.30212, 584.91124, 751368.47270
-    DEVIATED_SMALL = 2, "deviated small diameter, baseline", 0.28977, 882.15067, 680562.50150
-    VERTICAL_LARGE = 3, "vertical large diameter, baseline", 0.28180, 1275.52130, 632315.12640
-    DEVIATED_LARGE = 4, "deviated large diameter, baseline", 0.25528, 1716.71568, 500866.89110
-
-    SIMPLE = 5, "Simple", 0, 1846*1E6, 0 # Based on Fervo Project Cape cost per meter (~$1846/m)
-
-    VERTICAL_SMALL_INT1 = 6, "vertical small diameter, intermediate1", 0.13710, 129.61033, 1205587.57100
-    VERTICAL_SMALL_INT2 = 7, "vertical small diameter, intermediate2", 0.00804, 455.60507, 921007.68680
-    DEVIATED_SMALL_INT1 = 8, "deviated small diameter, intermediate1", 0.15340, 120.31700, 1431801.54400
-    DEVIATED_SMALL_INT2 = 9, "deviated small diameter, intermediate2", 0.00854, 506.08357, 1057330.39000
-    VERTICAL_LARGE_INT1 = 10, "vertical large diameter, intermediate1", 0.18927, 293.45174, 1326526.31300
-    VERTICAL_LARGE_INT2 = 11, "vertical large diameter, intermediate2", 0.00315, 782.69676, 983620.25270
-    DEVIATED_LARGE_INT1 = 12, "deviated large diameter, intermediate1", 0.19950, 296.13011, 1697867.70900
-    DEVIATED_LARGE_INT2 = 13, "deviated large diameter, intermediate2", 0.00380, 838.90249, 1181947.04400
-    VERTICAL_SMALL_IDEAL = 14, "vertical open-hole, small diameter, ideal", 0.00252, 439.44503, 590611.90110
-    DEVIATED_SMALL_IDEAL = 15, "deviated liner, small diameter, ideal", 0.00719, 455.85233, 753377.73080
-    VERTICAL_LARGE_IDEAL = 16, "vertical open-hole, large diameter, ideal", -0.00240, 752.93946, 524337.65380
-    DEVIATED_LARGE_IDEAL = 17, "deviated liner, large diameter, ideal", 0.00376, 762.52696, 765103.07690
-
-    def __init__(self, int_value: int, _: str, c2: float, c1: float, c0: float):
+    """
+    Akindipe, D. and Witter. E. 2025.
+        "2025 Geothermal Drilling Cost Curves Update".
+        https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2025/Akindipe.pdf?t=1740084555
+
+    Robins, J.C., Kesseli, D., Witter, E. and Rhodes, G. 2022.
+        "2022 GETEM Geothermal Drilling Cost Curve Update."
+        https://www.nrel.gov/docs/fy23osti/82771.pdf
+
+    Note: order should be retained since input is read as an int; first int arg is duplicative of order
+    """
+
+    VERTICAL_SMALL = 1, "vertical small diameter, baseline", 0.258496, 357.967, 738531.58, \
+        _WellDrillingCostCorrelationCitation.NREL_COST_CURVE_2025
+    DEVIATED_SMALL = 2, "deviated small diameter, baseline", 0.240624, 646.1621, 503625.06, \
+        _WellDrillingCostCorrelationCitation.NREL_COST_CURVE_2025
+    VERTICAL_LARGE = 3, "vertical large diameter, baseline", 0.248458, 935.8985, 626586.68, \
+        _WellDrillingCostCorrelationCitation.NREL_COST_CURVE_2025
+    DEVIATED_LARGE = 4, "deviated large diameter, baseline", 0.217333, 1362.93, 301066.16, \
+        _WellDrillingCostCorrelationCitation.NREL_COST_CURVE_2025
+
+    SIMPLE = 5, "Simple (per-meter cost)", 0, 1846 * 1E6, 0, \
+        _WellDrillingCostCorrelationCitation.SIMPLE
+
+    VERTICAL_SMALL_INT1 = 6, "vertical small diameter, intermediate1", 0.13710, 129.61033, 1205587.57100, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    VERTICAL_SMALL_INT2 = 7, "vertical small diameter, intermediate2", 0.00804, 455.60507, 921007.68680, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    DEVIATED_SMALL_INT1 = 8, "deviated small diameter, intermediate1", 0.15340, 120.31700, 1431801.54400, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    DEVIATED_SMALL_INT2 = 9, "deviated small diameter, intermediate2", 0.00854, 506.08357, 1057330.39000, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    VERTICAL_LARGE_INT1 = 10, "vertical large diameter, intermediate1", 0.18927, 293.45174, 1326526.31300, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    VERTICAL_LARGE_INT2 = 11, "vertical large diameter, intermediate2", 0.00315, 782.69676, 983620.25270, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    DEVIATED_LARGE_INT1 = 12, "deviated large diameter, intermediate1", 0.19950, 296.13011, 1697867.70900, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    DEVIATED_LARGE_INT2 = 13, "deviated large diameter, intermediate2", 0.00380, 838.90249, 1181947.04400, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    VERTICAL_SMALL_IDEAL = 14, "vertical open-hole, small diameter, ideal", 0.00252, 439.44503, 590611.90110, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    DEVIATED_SMALL_IDEAL = 15, "deviated liner, small diameter, ideal", 0.00719, 455.85233, 753377.73080, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    VERTICAL_LARGE_IDEAL = 16, "vertical open-hole, large diameter, ideal", -0.00240, 752.93946, 524337.65380, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+    DEVIATED_LARGE_IDEAL = 17, "deviated liner, large diameter, ideal", 0.00376, 762.52696, 765103.07690, \
+        _WellDrillingCostCorrelationCitation.GEOVISION
+
+    def __init__(self, int_value: int, _: str, c2: float, c1: float, c0: float,
+                 citation: _WellDrillingCostCorrelationCitation):
         self._c2 = c2
         self._c1 = c1
         self._c0 = c0
+        self.citation: _WellDrillingCostCorrelationCitation = citation
         super().__init__(int_value, _)
 
     def calculate_cost_MUSD(self, meters) -> float:
@@ -216,7 +264,7 @@ def from_int(int_val):
                 return member
 
     @staticmethod
-    def from_input_string(input_string:str):
+    def from_input_string(input_string: str):
         for member in __class__:
             if input_string == str(member.int_value):
                 return member
@@ -243,8 +291,6 @@ def from_input_string(input_string: str):
         raise ValueError(f'Unknown Working Fluid input value: {input_string}')
 
 
-
-
 class Configuration(GeophiresInputEnum):
     ULOOP = 1, "utube"
     COAXIAL = 2, "coaxial"
@@ -285,6 +331,7 @@ def from_input_string(input_string: str):
 
         raise ValueError(f'Unknown Flow Rate Model input value: {input_string}')
 
+
 class InjectionTemperatureModel(GeophiresInputEnum):
     USER_SUPPLIED = 1, "user supplied"
     FILE_SUPPLIED = 2, "file supplied"

src/geophires_x/__init__.py

@@ -1 +1 @@
-__version__ = '3.8.4'
+__version__ = '3.8.6'

src/geophires_x_schema_generator/geophires-request.json

@@ -1671,7 +1671,7 @@
       "maximum": 1.0
     },
     "Well Drilling Cost Correlation": {
-      "description": "Select the built-in well drilling and completion cost correlation: 1: vertical small diameter, baseline; 2: deviated small diameter, baseline; 3: vertical large diameter, baseline; 4: deviated large diameter, baseline; 5: Simple; 6: vertical small diameter, intermediate1; 7: vertical small diameter, intermediate2; 8: deviated small diameter, intermediate1; 9: deviated small diameter, intermediate2; 10: vertical large diameter, intermediate1; 11: vertical large diameter, intermediate2; 12: deviated large diameter, intermediate1; 13: deviated large diameter, intermediate2; 14: vertical open-hole, small diameter, ideal; 15: deviated liner, small diameter, ideal; 16: vertical open-hole, large diameter, ideal; 17: deviated liner, large diameter, ideal",
+      "description": "Select the built-in well drilling and completion cost correlation: 1: vertical small diameter, baseline; 2: deviated small diameter, baseline; 3: vertical large diameter, baseline; 4: deviated large diameter, baseline; 5: Simple (per-meter cost); 6: vertical small diameter, intermediate1; 7: vertical small diameter, intermediate2; 8: deviated small diameter, intermediate1; 9: deviated small diameter, intermediate2; 10: vertical large diameter, intermediate1; 11: vertical large diameter, intermediate2; 12: deviated large diameter, intermediate1; 13: deviated large diameter, intermediate2; 14: vertical open-hole, small diameter, ideal; 15: deviated liner, small diameter, ideal; 16: vertical open-hole, large diameter, ideal; 17: deviated liner, large diameter, ideal. Baseline correlations (1-4) are from NREL's 2025 cost curve update. Intermediate and ideal correlations (6-17) are from GeoVision.",
       "type": "integer",
       "units": null,
       "category": "Economics",
@@ -1701,7 +1701,7 @@
         },
         {
           "name": "SIMPLE",
-          "value": "Simple",
+          "value": "Simple (per-meter cost)",
           "int_value": 5
         },
         {