Log_Channel_Set


[Columns] [Composed Of] [Referenced By] [Refers To]

General Information

[Next]
Name Log_Channel_Set
Entity Type Table
Description Each Log_Channel_Set defines the set of channels recorded in an ordered series and characterizes the index of the set.
Submodel Well_Log
Entity Scope Project
Primary Key Id
Natural Key
Generalizations Entity , IT_Object , Tracked_Object
Specializations


Columns

[Previous] [Next] [Top]
NameValue DomainProperty /
Storage Unit
DescriptionRequired /
Default
Type
Borehole_Id Borehole
The identifier of the borehole from which the data in the set of log channels was derived. Yes
NUMBER(38)
Bulk_Array_Id Bulk_Array
The identifier of the bulk array containing the data associated with the Log Channel Set. No
NUMBER(38)
Compound_Channel_Set_Id Log_Channel_Set
A compound channel set allows a user to dynamically add or remove extended channels to a parent channel set. An example of this usage is establishing depth reference where an initial log channel set provides the depth tie-in for later log channel sets. No
NUMBER(38)
Compound_Index_Offset int No_Unit
Specifies the number of samples the child Log_Channel_Set is offset from the first sample of the parent Log_Channel_Set. This provides an implicit index mechanism for the child Log_Channel_Set and replaces any other indexes found within the child Log_Channel_Set. If this attribute is NULL the child Log_Channel_Set must have its own valid implicit or explicit indexes. No
NUMBER(10)
Direction CODE NA
The Direction attribute specifies the behavior of the signed value of the Index. If this Attribute is absent, then Index direction is unknown or irrelevant. Options are DECREASING (Index decreases monotonically) or INCREASING (Index increases monotonically). No
VARCHAR2(64)
Encrypted_Flag boolean NA
Flag value that indicates if a Log_Channel_Set is encrypted. Y means it is encrypted, N means it is not encrypted. No
NUMBER(1)
Existence_Kind REF_EXISTENCE_KIND NA
A reference value that describes the state of existence in the lifecycle of the entity, for example, Planned, Predicted, Required, Simulated, and Actual. Yes
Actual
VARCHAR2(64)
GUID STRING128 NA
Globally Unique IDentifier for an instance of a class. USAGE NOTES: There are two cases: 1) GUID is not populated or used; and 2) it is populated with a value that is globally unique. If the GUID is populated there are two means of doing so for a given project: 2a) Seabed automatically generates and populates the GUID when an instance is created (valid only on Oracle based systems); and 2b) the GUID is generated and populated by an application (other than Seabed) on instance creation. Whether Seabed automatically generates GUIDs for a project is determined by the Auto_GUID flag in SDS_Account. Note that techniques 2a and 2b can coexist in the same project. When GUIDs are automatically generated an application can override the automatically generated GUID with its own GUID by simply supplying the GUID value. Applications that generate their own GUIDs and populate the GUID column will function correctly on projects which have automatic GUID generation turned on. No
VARCHAR2(128)
Id ID No_Unit
Unique identifier for this entity. Yes
NUMBER(38)
Index_Max double No_Unit
Specifies the maximum value of the Index Channel. No
NUMBER
Index_Min double No_Unit
Specifies the minimum value of the Index Channel. No
NUMBER
Index_Property R_Property
The property type attribute describes implicit indexes defined by the Index_Min, Index_Max and Spacing. This value will be NULL for Log_Channel_Sets with well defined explicit Log_Channel indexes, such as MD or TVD, No
VARCHAR2(64)
Index_Type CODE NA
The index type attribute specifies the type of Index, if present. Typical options include ANGULAR-DRIFT (Index measures angle about the Vertical Generatrix), BOREHOLE-DEPTH, (Index measures depth along the borehole) NON-STANDARD (Index is not a standard measurement), RADIAL-DRIFT (Index measures distance from the Vertical Generatrix), TIME (Index measures elapsed time), VERTICAL-DEPTH (Index measures depth along the Vertical Generatrix). If index type is absent, then there is no Index Channel and attributes Direction and Spacing provide the implicit index method. No
VARCHAR2(64)
Index_UOM R_Unit
The unit for the index axis as stored in the bulk data or offline on the original tape. Yes
VARCHAR2(64)
Insert_Date DATE NA
Date the entity was created in the repository No
DATE
Insert_User STRING64 NA
The name of the user responsible for the creation of this entity in the repository. No
VARCHAR2(64)
Log_Acq_Activity_Id Logging_Activity
The logging acquisition activity that created this channel. No
NUMBER(38)
Name ENTITY_NAME NA
The name given to any object or data item, e.g. name of Well, name of Field, etc. No
VARCHAR2(255)
Original_Source STRING64 NA
The name of the person, Organization or project source that originally provided this entity, e.g. "IHS-EnergyData" or "FinderUpper Stratton Deeper Pool 15" No
VARCHAR2(64)
Produced_By STRING64 NA
The name of application role that created the entity, for data created programmatically. No
VARCHAR2(64)
Reference_Datum_Id Coordinate_System
The vertical coordinate system that specifies the reference, or working, datum providing the zero reference point from which vertical distances are measured. A common example is Kelly Bushing. Yes
NUMBER(38)
Remarks STRING2000 NA
Any type of remarks added to an entity instance. No
VARCHAR2(2000)
SDAT_Label int No_Unit
Label used by the security system for entitlements. SDAT is Secure Data Access Technology. No
NUMBER(10)
Sample_Count int No_Unit
The total number of valid (not null) data values in the log channel set. Note: this attribute should only be used for log channel sets taken with an irregular sample rate. No
NUMBER(10)
Source STRING64 NA
Name of the person or organization responsible for this entitys E and P content and quality. Not the data technologist or IT expert creating the entity, for which see IT_Object.Insert_User and Update_User. No
VARCHAR2(64)
Spacing double No_Unit
The Spacing attribute can be used to indicate a constant spacing of the Index. Its value is the signed difference of the later minus the earlier Index between any (and every) two successive channels of a given set. Thus, the Spacing Attribute is negative if the Index is decreasing (e.g., an up log) and is positive if the Index is increasing (e.g., a down log). No
NUMBER
Time_Vertical_Reference_Id Coordinate_System
The coordinate system in which the time datum is defined as the vertical reference. This is an elevation not a time value. No
NUMBER(38)
Update_Date DATE NA
Date of the most-recent modification to the entity. No
DATE
Update_User STRING64 NA
The name of the user responsible for the last modification to this entity. No
VARCHAR2(64)
Utilized_Survey_Id Deviation_Survey
The deviation survey that provides the preferred 3-D location positions for properties in this log channel set. No
NUMBER(38)
Version STRING255 NA
The form or variant of the entity. Yes
1
VARCHAR2(255)


Referenced By

[Previous] [Next] [Top]
From EntityLinkDescriptionImplementation TechniqueRequired
Log_Channel Log_Channel_Set The Log_Channel_Set that contains this Log_Channel Cascade Yes
Log_Channel_Set Compound_Channel_Set A compound channel set allows a user to dynamically add or remove extended channels to a parent channel set. An example of this usage is establishing depth reference where an initial log channel set provides the depth tie-in for later log channel sets. Restrict No
Log_Header_DOV Log_Channel_Set READ ONLY: Unique identifier for the log channel set. Nullify No
Rock_Sample_Channel_Set Log_Channel_Set The group of one or more log channels produced from the core. Cascade Yes
Study_Log_Channel_Set Log_Channel_Set The identifier of a set of log channels that are an element of the study. Nullify No


Refers To

[Previous] [Next] [Top]
LinkTo EntityDescriptionImplementation TechniqueRequired
Time_Vertical_Reference Coordinate_System The coordinate system in which the time datum is defined as the vertical reference. This is an elevation not a time value. Restrict No
Reference_Datum Coordinate_System The vertical coordinate system that specifies the reference, or working, datum providing the zero reference point from which vertical distances are measured. A common example is Kelly Bushing. Restrict Yes
Log_Acq_Activity Logging_Activity The logging acquisition activity that created this channel. Cascade No
Index_UOM R_Unit The unit for the index axis as stored in the bulk data or offline on the original tape. Restrict Yes
Utilized_Survey Deviation_Survey The deviation survey that provides the preferred 3-D location positions for properties in this log channel set. Restrict No
Compound_Channel_Set Log_Channel_Set A compound channel set allows a user to dynamically add or remove extended channels to a parent channel set. An example of this usage is establishing depth reference where an initial log channel set provides the depth tie-in for later log channel sets. Restrict No
Bulk_Array Bulk_Array The identifier of the bulk array containing the data associated with the Log Channel Set. Control No
Borehole Borehole The identifier of the borehole from which the data in the set of log channels was derived. Cascade Yes
Index_Property R_Property The property type attribute describes implicit indexes defined by the Index_Min, Index_Max and Spacing. This value will be NULL for Log_Channel_Sets with well defined explicit Log_Channel indexes, such as MD or TVD, Restrict No


[Seabed Objects] [Entities in Schema Seabed] [Index]

Copyright © 2018 Schlumberger. All rights reserved.