A well is a collection of (zero or more) wellbores drilled into the Earth for the purpose of either (1) finding or producing underground resources; or (2) providing services related to the production of underground resources.

identifier (M, K: ndt_name)

A unique identifying name for the well.


ref_existence_kind (M, K, I: ref_existence_kind)

The existence kind for the facility e.g. actual, planned, required or predicted. Inherited from facility.


abandonment_date (O: ndt_date_tod) (0840)

This is the date when operations on this well cease permanently.


description (O, I: ndt_comment)

A description of the facility. Inherited from facility.


spud_date (O: ndt_date_tod) (0840)

This is the spud date of the well. This date describes the date and time when activities to drill the well begin to create a hole in the earth.


activity (I, V: SET[0:?] activity(facility))

Defines the activities which have made use of or plan to use this facility. Each well may utilized by one or more activity. Inherited from facility.


address (I, V: SET[0:?] address(facility)) (1159)

The set of addresses which have been defined for this facility. Each well may have one or more address. Inherited from facility.


application_for_permit (I, V: SET[0:?] application_for_permit(facility))

These are the applications for permit which have been submitted for this facility. Each well may be the subject of one or more application_for_permit. Inherited from facility.


business_associate_facility_association (I, V: SET[0:?] business_associate_facility_association(facility))

Indicates various involvements with business associates. Each well may have one or more business_associate_facility_association. Inherited from facility.


composed_of_well (V: SET[0:?] well(part_of_well))

These are the wells that this well is composed of. This characteristic is intended to describe a well of structure rule simplex, complex or network to be composed of other wells. The structure rule of this well must not violate the structure rules of the component wells. For example, network well SJ-1 may be composed of simple well SJ-1a, but compound well AH-2 should not be composed of simplex wells HQ-2a and HQ-3a. Each well may be composed of one or more well.


data_collection (I, V: SET[0:?] data_collection(collection_content))

Indicates the data collections that include this instance of E and P data. Each well may be a member of one or more data_collection. Inherited from e_and_p_data.


datum_for_ranking (I, V: SET[0:?] object_ranking(base_object))

Indicates that an object is being used as a basis for comparison with another object. Each well may datum for ranking one or more object_ranking. Inherited from object_of_interest.


derived_interest (I, V: SET[0:?] derived_interest_makeup(interest_for))

These are the ownership fractions for business associates of this business object. Each well may be owned according to one or more derived_interest_makeup. Inherited from business_object.


earth_model (I, V: SET[0:?] earth_model(spatial_object))

Indicates various earth models which include this spatial representation. Each well may be part of one or more earth_model. Inherited from spatial_object.


equipment_installation (I, V: SET[0:?] equipment_installation(facility))

Gives the equipment utilizations that contribute to the service or business function of the facility, otherwise described as installation. Each well may define the service resulting from one or more equipment_installation. Inherited from facility.


facility_classification (I, V: SET[0:?] facility_classification(facility))

Gives the classifications that have been made of the facility. Each well may be classified by one or more facility_classification. Inherited from facility.


fulfill (I, V: SET[0:?] facility_fulfillment(fulfillment))

Shows the fulfillment of this facility (planned, required, or) expected) by another facility via the fulfillment association. Each well may be fulfilled by one or more facility_fulfillment. Inherited from facility.


fulfillment (I, V: SET[0:?] facility_fulfillment(fulfill))

Indicates the various planned facilities from which this facility is derived. Each well may be fulfillment of one or more facility_fulfillment. Inherited from facility.


graphical_element (I, V: SET[0:?] graphical_element(depicted_object))

Specifies one or more graphical elements which are depicting this data item. Each well may be depicted by one or more graphical_element. Inherited from e_and_p_data.


guideline_or_privilege (I, V: SET[0:?] guideline_or_privilege(business_object))

These are the guidelines, limitations, regulations or privileges that are specifically defined for this business object. Other general guidelines, etc., that apply to this business object are defined via the typical and class relationships (if any) defined for this business object. Each well may be the subject of one or more guideline_or_privilege. Inherited from business_object.


guideline_or_privilege_compliance (I, V: SET[0:?] guideline_or_privilege_compliance(business_object))

These are the designations of compliance with guidelines, limitations, regulations and privileges that are made for this business object. Each compliance statement describes the state of compliance for a specified guideline, limitation, regulation or privilege for a period of time. Each well may be the subject of one or more guideline_or_privilege_compliance. Inherited from business_object.


intersection_role (I, V: SET[0:?] space_time_operation(intersecting_object))

Indicates a space/time operation for which the object is involved as an intersecting agent. For projection, this is the screen on which an object is being projected. For proximity, this is the magnet object. Each well may be the intersecting object for one or more space_time_operation. Inherited from topological_object.


materials_characterization (I, V: SET[0:?] materials_characterization(site))

Indicates various materials analysis activities which take place at this site. Each well may be the site of one or more materials_characterization. Inherited from facility.


material_installation (I, V: SET[0:?] material_installation(facility))

Gives all the material utilizations that contribute to the service or business purpose of the facility. Each well may defines the service resulting from one or more material_installation. Inherited from facility.


object_of_ranking (I, V: SET[0:?] object_ranking(ranked_object))

Indicates that an object is being classified in a rank order based on its characteristics. Each well may object of ranking one or more object_ranking. Inherited from object_of_interest.


other_composite_spatial_object (I, V: SET[0:?] other_composite_spatial_object(composite_object))

Defines the set of composite spatial objects of which this spatial object is a component. Each well may be a component of one or more other_composite_spatial_object. Inherited from spatial_object.


part_of_facility (I, V: SET[0:?] facility_composition(part))

Gives the facilities for which this facility is a component part. For example: CDU1 is part of Refinery A. Each well may be the part for one or more facility_composition. Inherited from facility.


part_of_well (O: SET[0:?] well(composed_of_well))

Indicates various wells which make up the components of this well. This characteristic is intended to describe a well of any structure type (simple, simplex, compound, complex or network) to be a component of other wells. For example, simple well SJ-1a is a part of network well SJ-1. Each well may be a part of one or more well.


pfnu_grid_cell_connection (I, V: SET[0:?] pfnu_grid_cell_connection(product_flow_network_unit))

These are the cells that specify the location of this producing object within grids. A well completion, for example, may be connected to one cell within one grid and three cells within another. Each well may be simulated using one or more pfnu_grid_cell_connection. Inherited from product_flow_network_unit.


pfnu_period_report (I, V: SET[0:?] pfnu_period_report(product_flow_network_unit))

These are the externally generated performance reports for this product flow network unit. These reports describe the operational status and the volumes of oil, water, gas and condensate as reported by external sources. Detailed information based upon field measurements, simulation results and production allocation calculations are described in fluid flow streams associated with the product flow network unit ports. Pressures and temperatures are also defined at these ports. Each well may be described by one or more pfnu_period_report. Inherited from product_flow_network_unit.


primary_role (I, V: SET[0:?] space_time_operation(primary_object))

Indicates a space/time operation for which the object is involved as a primary agent. For degeneration, this object is being degenerated. For projection, this object is being projected onto another object. For proximity, this is the container object. Each well may be the primary object for one or more space_time_operation. Inherited from topological_object.


primary_topological_relationship (I, V: SET[0:?] topological_relationship(primary_topological_object))

Indicates a topological relationship in which the topologic object has the role of primary agent. For an object intersection type of "inside" this is the containing role (e.g., if a city is inside a county then the county would be the primary agent). For all other object intersection types the roles are symmetrical and both relationships must be searched for a particular object. For example, if a wellbore and a formation overlap then either could be chosen as the primary agent with the other chosen as the secondary agent. Each well may be primarily involved in one or more topological_relationship. Inherited from topological_object.


production_activity (I, V: SET[0:?] production_activity(product_flow_network_unit))

Indicates the various production activities report to this unit. Each well may be the object of one or more production_activity. Inherited from product_flow_network_unit.


product_flow_network_group_allocation (I, V: SET[0:?] product_flow_network_group_allocation(product_flow_network_unit)) (0655)

These are the descriptions of the product flow network groups and related allocation factors that this product flow network unit participates in. Each well may participate in one or more product_flow_network_group_allocation. Inherited from product_flow_network_unit.


product_flow_network_unit_port (I, V: SET[0:?] product_flow_network_unit_port(product_flow_network_unit))

Indicates the various flow ports of this unit. Each well may contain one or more product_flow_network_unit_port. Inherited from product_flow_network_unit.


property_damage (I, V: SET[0:?] property_damage(facility))

Indicates various records of property damage associated with this facility. Each well may be afflicted with one or more property_damage. Inherited from facility.


pty_bounding_rectangle (I, V: SET[0:?] pty_bounding_rectangle(composite_spatial_object))

Each well may have a property of one or more pty_bounding_rectangle. Inherited from composite_spatial_object.


pty_economic_gor_limit (V: SET[0:?] pty_economic_gor_limit(well))

Each well may have a property of one or more pty_economic_gor_limit.


pty_economic_limit_money (V: SET[0:?] pty_economic_limit_money(well))

Each well may have a property of one or more pty_economic_limit_money.


pty_economic_oil_cut_limit (V: SET[0:?] pty_economic_oil_cut_limit(well))

Each well may have a property of one or more pty_economic_oil_cut_limit.


pty_economic_water_cut_limit (V: SET[0:?] pty_economic_water_cut_limit(well))

Each well may have a property of one or more pty_economic_water_cut_limit.


pty_economic_wor_limit (V: SET[0:?] pty_economic_wor_limit(well))

Each well may have a property of one or more pty_economic_wor_limit.


pty_productivity_index (V: SET[0:?] pty_productivity_index(well))

Each well may have a property of one or more pty_productivity_index.


pty_specific_productivity_index (V: SET[0:?] pty_specific_productivity_index(well))

Each well may have a property of one or more pty_specific_productivity_index.


pty_unit_productivity_index (V: SET[0:?] pty_unit_productivity_index(well))

Each well may have a property of one or more pty_unit_productivity_index.


ref_naming_system (O: ref_naming_system)

The naming system in which the identifier is specified and determined to be unique.


ref_well_structure_rule (O: ref_well_structure_rule)

The rule that governs the structure of the well. Specifically, the description of a well as simple, simplex, compound, complex or network. This rule describes the valid combinations of wellbores that may be defined for a well. This rule is defined by the regulatory entity with the responsibility to approve new wells. It is used to determine when a new wellbore can be added to an existing well or when the new wellbore must be part of a new well.


reserves (I, V: SET[0:?] reserves(product_flow_network_unit))

Indicates various estimates fluid reserves for this facility. Each well may have one or more reserves. Inherited from product_flow_network_unit.


reserves_evaluation (I, V: SET[0:?] reserves_evaluation(product_flow_network_unit))

These are the reserves evaluation activities that have estimated reserves for this instance. Each well may be evaluated by one or more reserves_evaluation. Inherited from product_flow_network_unit.


reservoir_drainage_feature (V: SET[0:?] reservoir_drainage_feature(well))

These are the defined portions of the reservoir that this well influences, either by injection or production. Each well may influence one or more reservoir_drainage_feature.


sample_acquisition (I, V: SET[0:?] sample_acquisition(site))

Indicates various material acquisition activities which take place at this facility. Each well may be the site of one or more sample_acquisition. Inherited from facility.


satisfy_obligation (I, V: SET[0:?] contractual_obligation(contractual_obligation_object))

These are the contractual obligations that this business object is designated as fulfilling, either completely or partially. Each well may satisfy one or more contractual_obligation. Inherited from business_object.


secondary_topological_relationship (I, V: SET[0:?] topological_relationship(secondary_topological_object))

Indicates a topological relationship in which the object is in the role of secondary agent. For an object intersection type of "inside" this is the contained role (e.g., if a well is inside a field then the well would be the secondary agent). For all other object intersection types the roles are symmetrical and both relationships must be searched for a particular object. For example, if a wellbore and a formation overlap then either could be chosen as the secondary agent with the other chosen as the primary agent. Each well may be involved in one or more topological_relationship. Inherited from topological_object.


site_of_activity (I, V: SET[0:?] materials_processing(located_by_facility))

Indicates various materials processing activities which take place at this site. Each well may be the site of one or more materials_processing. Inherited from facility.


source_space_time_operation (I, V: BAG[0:1] space_time_operation(resulting_object))

Indicates the space/time operation from which a topological object was the result. For addition, this is the union of two objects. For degeneration, this is the degenerate object. Each well may be the result of one space_time_operation. Inherited from topological_object.


subject_of_contract (O, I: SET[0:?] contract(contract_business_object))

These are the contracts that specify information about the business object, and the business object is subject to the terms of these contracts. Each well may be a subject of one or more contract. Inherited from business_object.


subject_of_contract_designation (I, V: SET[0:?] contract_designation(contract_designation_object))

This defines the contract designations that are made for this business object. For example, this may be the contract designations that define the specific interest ownership fractions of the business object as it is bought and sold. Each well may be subject to one or more contract_designation. Inherited from business_object.


surface_fluid_phase_condition (I, V: SET[0:?] surface_fluid_phase_condition(product_flow_network_unit))

These are the surface and standard temperatures that are defined for a fluid phase at a product flow network unit. Each well may be characterized by one or more surface_fluid_phase_condition. Inherited from product_flow_network_unit.


typical_facility (O, I: typical_facility(facility))

Gives the typical facility whose specification was used as the generic basis for this facility. Each well may be specified by one typical_facility. Inherited from facility.


wellbore (V: SET[0:?] wellbore(well))

Indicates various wellbore which make up this well. Each well may be composed of one or more wellbore.


well_activity (V: SET[0:?] well_activity(well))

Indicates various activities associated with this well. Each well may be the site of one or more well_activity.


well_alias (V: SET[0:?] well_alias(well))

Indicates the various identifiers by which this well is known. Each well may be known by one or more well_alias.


well_completion (V: SET[0:?] well_completion(well))

Indicates various well completions in this well. Each well may have one or more well_completion.


well_report (V: SET[0:?] well_report(well))

Indicates various well reports of the information about this well. Each well may be described by one or more well_report.


well_slot (O: well_slot(well))

Specifies the well slot utilized to develop this well. Each well may be developed from one well_slot.


well_status (V: SET[0:?] well_status(well))

Indicates the various states of operational status of this well. Each well may be classified by one or more well_status.


well_surface_feature_role (V: SET[0:?] well_surface_feature_role(well))

Indicates various relationships this well may have with respect to various earth surface features. Roles may include: containment in a feature, for example. Each well may be related to one or more well_surface_feature_role.


well_surface_point (V: BAG[0:1] well_surface_point(well))

Specifies the surface location of a well as a point on the earth surface. Each well may be located by one well_surface_point.

Local rules:

Uniqueness Constraint
identifier, ref_existence_kind
Supertype path(s):
e_and_p_data > object_of_interest > business_object > facility > well.
product_flow_network_unit > well.
topological_object > spatial_object > composite_spatial_object > well.

Entity projects as table WELL.

Referenced in Diagrams:

• EMG2: Reservoir Geology (1226)
• EQF3: Facility Subtypes (1051, 1058)
• HL4: Object Aliasing
• POV1: PFNU Business Objects (0655, 0810, 1137, 1169)
• WI1: Well and Wellbore (1123)
• WI3: Well Completions
• WL2: Well Logging Activities
• WO1: Well Operations (0947, 1126, 1129)
• WO2: Wellbore Survey and Targets (1123, 1177)