POSC Specifications: Epicentre Version 3.0 | Logical Data Model |
A wellbore geologic target is either a geologic feature or a local rock feature that is defined as a target for a wellbore. Generally, local rock features represent specific regions of the subsurface, such as a drilling target. Geologic features represent more general targets, such as the intended penetrations of a wellbore.
- geologic_feature (O, K: geologic_feature(wellbore_geologic_target))
- This is the geologic feature for which this wellbore geologic target is defined. Each wellbore_geologic_target may defines as a target one geologic_feature.
- local_rock_feature (O, K: local_rock_feature(wellbore_geologic_target))
- This is the local rock feature which is defined as a target. Each wellbore_geologic_target may defines as a target one local_rock_feature.
- wellbore (M, K: wellbore(wellbore_geologic_target))
- This is the wellbore for which this target is defined. Each wellbore_geologic_target must is defined for one wellbore.
- description (O, I: ndt_comment) (C117)
- A remark or comment about the instance. Inherited from e_and_p_data.
- duration (O, I: ndt_time)
- Defines the duration of the association expressed in any valid units of time. Inherited from transient_association.
- end_time (O, I: ndt_date_tod)
- End time of the association. Inherited from transient_association.
- instance_create_date (O, I: ndt_date_tod) (C126)
- This is the date that this instance was created. This date is defined by the source if imported, or is the date the instance is created if a new instance. Inherited from e_and_p_data.
- instance_creator (O, I: ndt_identifier) (C126)
- This is the person, company or application that created this instance. This identifies the party responsible for loading this instance. Inherited from e_and_p_data.
- is_current (O, I: ndt_boolean) (C137)
- When TRUE, this flag indicates that this instance is designated as a current instance. This flag can be used in place of time based attributes or can be used in conjunction with them; however, it should not conflict with them. Inherited from transient_association.
- last_updated (O, I: ndt_date_tod) (C126)
- This is the date that this instance was last updated. This value should be updated when any part of this instance is altered (except for inverse relationships). Inherited from e_and_p_data.
- last_updated_by (O, I: ndt_identifier) (C126)
- This records the person or application making the update to this instance. Inherited from e_and_p_data.
- source (O, I: ndt_identifier) (C126)
- The provider of this instance, which is usually a data provider for imported/purchased data. If this instance is provided by POSC, then this attribute must be "POSC". Inherited from e_and_p_data.
- start_time (O, I: ndt_date_tod)
- Start time of the association. Inherited from transient_association.
- caused_by (O, I: activity(cause_association))
- Specifies the activity which establishes this association. Each wellbore_geologic_target may be caused by one activity. Inherited from transient_association.
- data_collection (I, V: SET[0:?] data_collection_content(collection_part)) (C020)
- Indicates the data collections that include this instance of E and P data. Each wellbore_geologic_target may be a member of one or more data_collection_content. Inherited from e_and_p_data.
- document_information_content (I, V: SET[0:?] document_information_content(e_and_p_data)) (C136)
- These are the document specification parts that include this data value and define its meaning within a document specification. Each use may define a different meaning, and many uses are allowed. Each wellbore_geologic_target may be included in one or more document_information_content. Inherited from e_and_p_data.
- graphical_element (I, V: SET[0:?] graphical_element(depicted_object))
- Specifies one or more graphical elements which are depicting this data item. Each wellbore_geologic_target may be depicted by one or more graphical_element. Inherited from e_and_p_data.
- next_target (O: wellbore_geologic_target(previous_target))
- This is the next target defined in this wellbore, usually deeper. The order is determined from surface to bottomhole. Each wellbore_geologic_target may is above one wellbore_geologic_target.
- previous_target (V: SET[0:1] wellbore_geologic_target(next_target)) (C151)
- This is the previous target defined in this wellbore, usually shallower. The order is determined from surface to bottomhole. Each wellbore_geologic_target may is below one wellbore_geologic_target.
- ref_transient_period (O, I: ref_transient_period(transient_association)) (C138)
- The type of period over which the property applies, such as day, month, quarter, cumulative, etc. Each wellbore_geologic_target may represent a period of one ref_transient_period. Inherited from transient_association.
- terminated_by (O, I: activity(terminate_association))
- Specifies the activity which established the termination of a transient association between two objects. Each wellbore_geologic_target may be terminated by one activity. Inherited from transient_association.
Local rules:
- Uniqueness Constraint (C056)
- geologic_feature, local_rock_feature, wellbore
- [I: transient_association] Instance Value Constraint (C050)
-
If REF_TRANSIENT_PERIOD is either YEAR TO DATE, MONTH TO DATE or CUMULATIVE, then END_TIME must be instantiated.
- [I: transient_association] Instance Value Constraint (C050)
-
If REF_TRANSIENT_PERIOD is ANNUAL, SEMIANNUAL, QUARTER, MONTHLY, DAILY, or HOURLY, then either both START_TIME and END_TIME are blank or both must be instantiated.
- [I: transient_association] Instance Value Constraint (C050)
-
If REF_TRANSIENT_PERIOD is EVENT, then both START_TIME and END_TIME must either be blank or be identical.
- Mandatory Relationship Set
-
An instance of WELLBORE_GEOLOGIC_TARGET must have either a GEOLOGIC_FEATURE or a LOCAL_ROCK_FEATURE.
- Same Related Instance (C050)
-
The next wellbore geologic target must be defined in the same wellbore.
Supertype path(s):
Referenced in Diagrams:
Generated on Tue Jul 10 15:55:47 2001
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