The Geysers geothermal field is the largest developed geothermal system in the world. The total installed capacity is presently 2,056 MW although actual production in early 1994 was estimated to be only 1,200 MW(net). The inability to produce at higher generation levels is due to the significant pressure decline that has occurred within the reservoir, particularly since the mid- 1980's. In 1992, a comprehensive field-wide numerical simulation model of The Geysers field was completed, based on drilling, well-test and production data provided by four of the five major field operators. The numerical simulation model was originally developed by UNO CAL, based primarily on data from the UNOCAL-NEC-Thermal (U-N-T) lease areas, and was extended in this study to incorporate data from the other operators.

This spreadsheet is a compilation of thermal spring temperature observations compiled by the Wyoming Geological Survey, published as a Web feature service for the National Geothermal Data System. The document contains 7 worksheets, including information about the template, instructions on using the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view) and a worksheet with vocabularies for use in populating the spreadsheet (data valid terms). Data from 126 springs are included. Fields in the data table include ThermalSpringURI, Name, Label, OtherName, OtherIdentifier, Description, Source, SourceURI, FeatureType, LandLeaseOwner, OtherLocationName, County, State, PLSS_Meridians, Township, Range, Section, SectionPart, Parcel, UTM_E, UTM_N, UTMDatumZone, LatDegree, LongDegree, SRS, LocationUncertaintyStatement, ObservationURI, Temperature, TemperatureUnits, TempMeasurementProcedure, TempMeasurementDateTime, Flow, FlowUnits, FlowMeasurementProcedure, FlowMeasurementDateTime, MeasurementSource, FlowContinuity, Classification, RelatedWaterChemistry, DataEntrySource, RelatedResources and Remarks.

This spreadsheet is a compilation of Active Fault features compiled by the California Geological Survey, published as a Web feature service for the National Geothermal Data System. The document contains 7 worksheets, including information about the template, instructions on using the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view) and a worksheet with vocabularies for use in populating the spreadsheet (data valid terms). Each feature in an active fault data set (row in this spreadsheet) should be characterized by a unique combination of name, URI, geologic history, slip, locatability and orientation properties, as well as being physically connected or inferred to be connected in the Earth. For mapped active faults ,which are the scope of this scheme, the deformation style is assumed to be brittle (as opposed to ductile). Fields in the data table include FeatureURI, Name, FullName, ParentFeatureURI, Label, Description, Symbol, OtherID, SpecificationURI, FeatureType, GeologicHistory, RepresentativeAgeURI, YoungerAgeURI, OlderAgeURI, IntervalSinceMovement, Shape, ObservationMethod, PositionAccuracyMeters, PositionAccuracy, Displacement, SlipRate, SlipAccumulationInterval, MovementType, MovementSense, DipDirection, DateMostRecentEvent, RecurrenceInterval, TotalSlip, Source and MetadataURI.

This spreadsheet is a compilation of Well header information compiled by the Massachusetts Geological Survey, published as a Web feature service for the National Geothermal Data System. The document contains 9 worksheets, including information about the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view) and a worksheet with vocabularies for use in populating the spreadsheet (data valid terms). Fields in the template include : HeaderURI, WellName , APINo, OtherID, OtherName, BoreholeName, ParentWellURI, Operator, MineralOwner, Driller, LeaseName, SpudDate, EndedDrillingDate, DrillingMethod, WellType, Status, CommodityOfInterest, StatusDate, Function, Production , ProducingInterval , ReleaseDate, County, State, Field, OtherLocationName, PLSS_Meridians, TWP, RGE, Section, SectionPart, Parcel, UTM_E, UTM_N, UTMDatumZone, LatDegree, LongDegree, , SRS, LocationUncertaintyStatement, LocationUncertaintyCode, LocationUncertaintyRadius, DrillerTotalDepth, DepthReferencePoint, LengthUnits, WellBoreShape, TrueVerticalDepth, ElevationKB, ElevationDF, ElevationGL, FormationTD, BitDiameterCollar, BitDiameterTD, DiameterUnits, RelatedResource, Notes, CasingBottomDepthDriller, CasingTopDepth, CasingPipeDiameter, CasingWeight, CasingWeightUnits, CasingThickness and InformationSource.

This spreadsheet is a compilation of borehole temperature observations compiled by the Massachusetts Geological Survey, published as a Web feature service for the National Geothermal Data System. The document contains 6 worksheets, including information about the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view) and a worksheet with vocabularies for use in populating the spreadsheet (data valid terms). Fields in the data table include ObservationURI, WellName, APINo, HeaderURI, OtherID, OtherName, BoreholeName, Operator, LeaseOwner, LeaseNo, SpudDate, EndedDrillingDate, WellType, Status, CommodityOfInterest, StatusDate, Function, Production, Field, County, State, PLSS_Meridians, TWP, RGE, Section, SectionPart, Parcel, UTM_E, UTM_N, UTMDatumZone, LatDegree, LongDegree, SRS, LocationUncertaintyStatement, DrillerTotalDepth, DepthReferencePoint, Shape, TrueVerticalDepth, LengthUnits, ElevationKB, ElevationDF, ElevationGL, BitDiameterCollar, BitDiameterTD, DiameterUnits, Notes, MaximumRecordedTemperature, MeasuredTemperature, CorrectedTemperature, TemperatureUnits, TimeSinceCirculation, MeasurementProcedure, CorrectionType, DepthOfMeasurement, MeasurementDateTime, MeasurementFormation, MeasurementSource, CasingLogger, CasingDepthDriller, CasingPipeDiameter, CasingWeight, CasingWeightUnits, CasingThickness, InformationSource, DrillingFluid, Salinity, MudResisitivity, Density, FluidLevel, pH, Viscosity, FluidLoss and MeasurementNotes.

This spreadsheet is a compilation of Aqueous Well Chemistry observations compiled by the California Geological Survey, published as a Web feature service for the National Geothermal Data System. The document contains 12 worksheets, including information about the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view), An Analyte Dictionary and a worksheet with vocabularies for use in populating the spreadsheet (data valid terms). Data from 468 wells are included.

This spreadsheet is a compilation of borehole observations compiled by the Ohio Department of Natural Resources, published as a Web feature service for the National Geothermal Data System. The document contains 6 worksheets, including information about the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view) and a worksheet with vocabularies for use in populating the spreadsheet (data valid terms). Data from 334 wells are included. Fields in the data table include ObservationURI, WellName , APINo, HeaderURI, OtherID, OtherName, BoreholeName, Operator, LeaseOwner, LeaseNo, SpudDate, EndedDrillingDate, WellType, Status, CommodityOfInterest, StatusDate, Function, Production , Field, County, State, PLSS_Meridians, TWP, RGE, Section, SectionPart, Parcel, UTM_E, UTM_N, UTMDatumZone, LatDegree, LongDegree, SRS, LocationUncertaintyStatement, DrillerTotalDepth, WellboreShape, TrueVerticalDepth, LengthUnits, ElevationGL, BitDiameterCollar, BitDiameterTD, DiameterUnits, Notes, MaximumRecordedTemperature , MeasuredTemperature, CorrectedTemperature, TemperatureUnits, TimeSinceCirculation , CirculationDuration, MeasurementProcedure, CorrectionType, DepthOfMeasurement, MeasurementDateTime, MeasurementFormation, MeasurementSource, CasingLogger, CasingDepthDriller, CasingPipeDiameter, CasingWeight, CasingWeightUnits, CasingThickness, DrillingFluid, Salinity, MudResisitivity, Density, FluidLevel, pH, Viscosity, FluidLoss, InformationSource.

This spreadsheet is a compilation of borehole temperature observations compiled by the West Virginia Geological and Economic Survey, published as a Web feature service for the National Geothermal Data System. The document contains 6 worksheets, including information about the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view) and a worksheet with vocabularies for use in populating the spreadsheet (data valid terms). Data from 48 wells are included. Fields in the data table include ObservationURI, WellName, APINo, HeaderURI, OtherID, OtherName, BoreholeName, Operator, LeaseOwner, LeaseNo, SpudDate, EndedDrillingDate, WellType, Status, CommodityOfInterest, StatusDate, Function, Production, Field, County, State, PLSS_Meridians, TWP, RGE, Section, SectionPart, Parcel, UTM_E, UTM_N, UTMDatumZone, LatDegree, LongDegree, SRS, LocationUncertaintyStatement, DrillerTotalDepth, DepthReferencePoint, Shape, TrueVerticalDepth, LengthUnits, ElevationKB, ElevationDF, ElevationGL, BitDiameterCollar, BitDiameterTD, DiameterUnits, Notes, MaximumRecordedTemperature, MeasuredTemperature, CorrectedTemperature, TemperatureUnits, TimeSinceCirculation, MeasurementProcedure, CorrectionType, DepthOfMeasurement, MeasurementDateTime, MeasurementFormation, MeasurementSource, CasingLogger, CasingDepthDriller, CasingPipeDiameter, CasingWeight, CasingWeightUnits, CasingThickness, InformationSource, DrillingFluid, Salinity, MudResisitivity, Density, FluidLevel, pH, Viscosity, FluidLoss, MeasurementNotes.

This dataset contains well log observations compiled by the Ohio Department of Natural Resources, and published as a Web feature service for the National Geothermal Data System. Fields in the Well Log Observation Content Model will become XML elements in interchange documents for WMS simple features provided by a node in the USGIN network. Each feature includes an Display name, Log type as well as Latitude and Longitude spatially referenced to EPSG: 4326 (for interoperability). The data contained in the submitted dataset is available as an Excel Spreadsheet, ESRI service, WMS and WFS service. Link to Well Log Observation Content Model: http://www.stategeothermaldata.org/data_delivery/content_models/well_log_observation.

This spreadsheet is a compilation of thermal spring temperature observations compiled by the Arizona Geological Survey, published as a Web feature service for the National Geothermal Data System. The document contains 7 worksheets, including information about the template, instructions on using the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view) and a worksheet with vocabularies for use in populating the spreadsheet (data valid terms). Data from 130 springs are included. Fields in the data table include ThermalSpringURI, Name, Label, OtherName, OtherIdentifier, Description, Source, SourceURI, FeatureType, LandLeaseOwner, OtherLocationName, County, State, PLSS_Meridians, Township, Range, Section, SectionPart, Parcel, UTM_E, UTM_N, UTMDatumZone, LatDegree, LongDegree, SRS, LocationUncertaintyStatement, ObservationURI, Temperature, TemperatureUnits, TempMeasurementProcedure, TempMeasurementDateTime, Flow, FlowUnits, FlowMeasurementProcedure, FlowMeasurementDateTime, MeasurementSource, FlowContinuity, Classification, RelatedWaterChemistry, DataEntrySource, RelatedResources and Remarks.