A point on the surface of the Earth that represents the location of a well. For onshore wells, this point is located at ground level. For offshore wells, this point is located at the water line.

identifier (O, K: ndt_name)

The identifying label of a point.


well (M, K: well(well_surface_point))

Indicates the well located by a particular well point. Each well_surface_point must locate one well.


description (O: ndt_comment)

A textual description of the point.


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_surface_point 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_surface_point 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_surface_point 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_surface_point may be part of one or more earth_model. Inherited from spatial_object.


edge (I, V: SET[0:?] edge(vertex))

Defines the edges for which this vertex forms part of the boundary. Each well_surface_point may bind one or more edge. Inherited from vertex.


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

Specifies one or more graphical elements which are depicting this data item. Each well_surface_point 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_surface_point 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_surface_point 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_surface_point may be the intersecting object for one or more space_time_operation. Inherited from topological_object.


local_vertical_datum (I, V: SET[0:?] local_vertical_datum(earth_point))

Indicates the usage of this earth point to establish one or more vertical datum planes Each well_surface_point may intersect one or more local_vertical_datum. Inherited from earth_point.


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_surface_point may object of ranking one or more object_ranking. Inherited from object_of_interest.


observed_baseline (I, V: SET[0:?] observation_definition(baseline_node))

This defines the set of observations where this point was the baseline node for a positioning facility. Each well_surface_point may be baseline node in one or more observation_definition. Inherited from earth_surface_point.


observed_reference (I, V: SET[0:?] observation_definition(reference_node))

This defines the set of observations where this point was the reference node for a positioning facility. Each well_surface_point may be the reference node in one or more observation_definition. Inherited from earth_surface_point.


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_surface_point may be a component of one or more other_composite_spatial_object. Inherited from spatial_object.


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_surface_point 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_surface_point may be primarily involved in one or more topological_relationship. Inherited from topological_object.


pty_legal_survey_location (V: SET[0:?] pty_legal_survey_location(well_surface_point))

Each well_surface_point may have a property of one or more pty_legal_survey_location.


pty_location_1d (V: SET[0:?] pty_location_1d(well_surface_point))

Each well_surface_point may have a property of one or more pty_location_1d.


pty_location_2d (V: SET[0:?] pty_location_2d(well_surface_point))

Each well_surface_point may have a property of one or more pty_location_2d.


pty_magnetic_declination (I, V: SET[0:?] pty_magnetic_declination(earth_surface_point))

Each well_surface_point may have a property of one or more pty_magnetic_declination. Inherited from earth_surface_point.


pty_magnetic_inclination (I, V: SET[0:?] pty_magnetic_inclination(earth_point))

Each well_surface_point may have a property of one or more pty_magnetic_inclination. Inherited from earth_point.


pty_water_depth (V: SET[0:?] pty_water_depth(well_surface_point))

Each well_surface_point may have a property of one or more pty_water_depth.


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_surface_point 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_surface_point may be involved in one or more topological_relationship. Inherited from topological_object.


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_surface_point 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_surface_point 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_surface_point may be subject to one or more contract_designation. Inherited from business_object.


vertical_datum_offset (I, V: SET[0:?] vertical_datum_offset(earth_point))

These are the offsets between vertical datums that are defined as passing through this point. This earth point is being used to locate the offset. Each well_surface_point may be used to define one or more vertical_datum_offset. Inherited from earth_point.

Local rules:

Uniqueness Constraint
identifier, well
Supertype path(s):
topological_object > spatial_object > simple_spatial_object > vertex > earth_point > earth_surface_point > well_surface_point.
e_and_p_data > object_of_interest > business_object > well_surface_point.

Entity projects as table WELL_SURFACE_PT.

Referenced in Diagrams:

• CT2: Earth Surface Topology (0712)
• CT4: General Positioning
• WI1: Well and Wellbore (1123)