POSC Specifications: Epicentre Version 3.0 | Logical Data Model |
An exponential decline rate calculated as the change in producing rate over a unit interval of time (such as a month or year) divided by the rate at the beginning of the time period.
- end_time (O, K, I: ndt_date_tod)
- The date and time of day designated as the end of the valid or effective time interval over which the property applies. Inherited from pty_transient_property.
- ref_transient_period (O, K, I: ref_transient_period(pty_transient_property)) (C138)
- The type of period over which the property applies, such as day, month, quarter, cumulative, etc. Each pty_eff_expon_decline_rate may represent a period of one ref_transient_period. Inherited from pty_transient_property.
- start_time (O, K, I: ndt_date_tod)
- The date and time of day that designated the start of the valid or effective time interval over which the property applies. Inherited from pty_transient_property.
- activity (O, K, I: activity(process_data))
- Defines the activity which created this instance. Each pty_eff_expon_decline_rate may be the result of one activity. Inherited from process_data.
- fluid_flow_stream (O, K, I: fluid_flow_stream(pty_decline_rate))
- This describes the flow stream that this decline rate characterizes. Each pty_eff_expon_decline_rate may be a property of one fluid_flow_stream. Inherited from pty_decline_curve.
- data_value (M: ndt_percent_le_100)
- The value of the effective exponential decline rate.
- initial_rate (M: ndt_any_quantity)
- The initial production or injection rate (at the start time) used to define the decline rate.
- description (O, I: ndt_comment) (C117)
- A remark or comment about the instance. Inherited from e_and_p_data.
- 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.
- 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.
- preferred_flag (O, I: ndt_boolean)
- The flag is set to True if this instance of property is the preferred value in this data store of this type of property for the object which this property describes. Inherited from property.
- 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.
- 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 pty_eff_expon_decline_rate 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 pty_eff_expon_decline_rate 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 pty_eff_expon_decline_rate may be depicted by one or more graphical_element. Inherited from e_and_p_data.
- process_data_item (I, V: SET[0:?] process_data_item(process_data))
- Defines where this data was used by an activity. Each pty_eff_expon_decline_rate may be the value for one or more process_data_item. Inherited from process_data.
- represent (O, I: property(representations)) (C125)
- This is the property that is the original for which this representation is an equivalent representation. Each pty_eff_expon_decline_rate may be an equivalent representation of one property. Inherited from property.
- representations (I, V: SET[0:?] property(represent)) (C125)
- This designates other properties that are stated to be equivalent representations of this property representation, such as the same geometry using another coordinate system. Each pty_eff_expon_decline_rate may have as equivalent representations one or more property. Inherited from property.
Local rules:
- Uniqueness Constraint
- end_time, ref_transient_period, start_time, activity, fluid_flow_stream
- [I: property] Mandatory Relationship Set
-
Each PROPERTY must "be a property of" one object.
- [I: pty_transient_property] Instance Value Constraint (C050)
-
If REF_PERIOD_TYPE is EVENT, then both START_TIME and END_TIME must either be blank or be identical.
- [I: pty_transient_property] 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: pty_transient_property] 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.
Supertype path(s):
Entity consolidated into table P_DECLINE_CURVE.
Referenced in Diagrams:
Generated on Tue Jul 10 15:47:07 2001
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