POSC Specifications: Epicentre Version 3.0 | Logical Data Model |
The description of the fractional participation (allocation) of a well completion in a well pattern. A corner well completion in a five spot pattern may have an allocation factor of one-fourth, for example. For well completions involving multiple zones, a vertical allocation factor may also be specified. If both factors are specified, the allocation factor is the product of the two factors. If either factor is no provided, the other factor is the allocation factor. These participations may change with time due to changes in reservoir behavior, operational parameters (rates), or when well completions are added to or deleted from the pattern.
- end_time (O, K, I: ndt_date_tod)
- End time of the association. Inherited from transient_association.
- start_time (O, K, I: ndt_date_tod)
- Start time of the association. Inherited from transient_association.
- pfnu (M: well_completion) (C112)
- This is the well completion for which this participation factor is defined. Each well_pattern_participation must define the participation of one well_completion. Redeclaration of attribute inherited from pfnu_group_allocation.
- pfnu_group (M: well_pattern) (C112)
- This is the well pattern that the designated well completion is a part of. Each well_pattern_participation must be defined for one well_pattern. Redeclaration of attribute inherited from pfnu_group_allocation.
- 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.
- horizontal_factor (O, I: ndt_pfrac_le_1)
- The allocation factor for a product flow network unit in a product flow network group. This factor is based upon the areal distribution or capture of fluids entering or leaving the group, and should be non-zero for all participating product flow network units. This fraction should be used to allow a product flow network unit to contribute all or any part of its production or injection behavior to the group. Inherited from pfnu_group_allocation.
- 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.
- vertical_factor (O: ndt_pfrac_le_1)
- The vertical factor for a well completion in a well pattern. This factor is based upon the vertical separation of injected and produced fluids between separate zones for which overlapping well patterns are defined (i.e., upper pattern or lower pattern). This factor should be non-zero for all completions participating in the well pattern, and should be one for well patterns that are not split vertically. These fractions may be based upon production logs (spinner, temperature or tracer surveys) or estimated from performance and geological data (fraction of permeability-thickness, pressure, etc.)
- caused_by (O, I: activity(cause_association))
- Specifies the activity which establishes this association. Each well_pattern_participation 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 well_pattern_participation 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 well_pattern_participation 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 well_pattern_participation may be depicted by one or more graphical_element. Inherited from e_and_p_data.
- 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 well_pattern_participation may represent a period of one ref_transient_period. Inherited from transient_association.
- ref_well_participation_geom (O: ref_well_participation_geom(well_pattern_participation)) (C112, C138)
- The geometrical participation of a well completion in a well pattern, such as a central well, corner well, edge well, and off-pattern well. Each well_pattern_participation may have one ref_well_participation_geom.
- ref_well_participation_role (O: ref_well_participation_role(well_pattern_participation)) (C138)
- The role for a well completion participating in the well pattern, either producing or injecting. Each well_pattern_participation may have one ref_well_participation_role.
- terminated_by (O, I: activity(terminate_association))
- Specifies the activity which established the termination of a transient association between two objects. Each well_pattern_participation may be terminated by one activity. Inherited from transient_association.
Local rules:
- [I: pfnu_group_allocation] Uniqueness Constraint
- end_time, start_time, pfnu_group, pfnu
- [I: transient_association] Instance Value Constraint (C050)
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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)
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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.
Supertype path(s):
Referenced in Diagrams:
Generated on Tue Jul 10 15:56:18 2001
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