| 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 |
| Name | Value Domain | Property / Storage Unit | Description | Required / 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) |
| From Entity | Link | Description | Implementation Technique | Required |
|---|---|---|---|---|
| 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 |
| Link | To Entity | Description | Implementation Technique | Required |
|---|---|---|---|---|
| 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 |