| Name | Log_Channel |
|---|---|
| Entity Type | Table |
| Description | A measured or computed quantity that occurs as a sequence of samples indexed against time, depth, or some other physical dimension of a well. |
| Submodel | Well_Log |
| Entity Scope | Project |
| Primary Key | Id |
| Natural Key | Log_Channel_Set_Id , Code , Namespace , Preferred , Rank , Name , Existence_Kind , Version |
| Generalizations | Entity , IT_Object , Tracked_Object |
| Specializations |
| Name | Value Domain | Property / Storage Unit | Description | Required / Default | Type |
|---|---|---|---|---|---|
| API_Curve_Modifier | R_API_Curve_Modifier |
|
The code of the API curve modifier describing the pass from which the curve is derived, such as Main, Repeat(1), Repeat(2) and Calibration. | No |
VARCHAR2(64) |
| Axis_Flag | boolean | NA |
A flag value to indicate if this channel describes a coordinate axes of an array. 1 = Channel is an axis. 0 = Channel is not an axis. | No |
NUMBER(1) |
| Borehole_Copy_Number | int | No_Unit |
The system generated sequence for the number of channels with this code loaded to this borehole. This number will not be reused if the channel is deleted. It is not shareable across projects. | No |
NUMBER(10) |
| Code | R_Log_Channel | NA |
A standard abbreviation, mnemonic, or short code that represents the reference value. | Yes |
VARCHAR2(64) |
| Copy_Number | int | No_Unit |
For a curve mnemonic that appears more than once in a file, this number uniquely identifies the occurrence of the mnemonic in the file. (A DLIS parameter) | No |
NUMBER(10) |
| Data_Format | R_Data_Format |
|
Internal storage format of data. Examples are 32-BIT FLOAT, and Exponential | No |
VARCHAR2(64) |
| Data_Type | R_Data_Type |
|
The identifier of the data type (integer, float, etc) of the values of the log channel. In a DLIS format file, this is the Representation Code (RCODE). | No |
VARCHAR2(64) |
| Discrete_Value_Set_Id | Discrete_Value_Set |
|
The discrete value set used to map integer values found in the bulk array storing the log channel to names. | No |
NUMBER(38) |
| 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) |
| 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_Channel_Set_Id | Log_Channel_Set |
|
The Log_Channel_Set that contains this Log_Channel | Yes |
NUMBER(38) |
| Log_Channel_Type | R_Channel_Type |
|
The type of log channel. Examples are Core and Discrete. | No |
VARCHAR2(64) |
| Log_Tool_Id | Log_Tool |
|
The tool for this log 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) |
| Namespace | R_Log_Channel | NA |
The person, company or application that defined or specified the data (content) for this instance and is considered to be responsible for it. For example, POSC, EPSG, API, ISO, etc.. | Yes |
VARCHAR2(64) |
| 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) |
| Preferred | CODE | NA |
The source of preferred usage. This attribute has been deprecated effective 2012.1 release of this product. It will be removed in a later version. | No |
VARCHAR2(64) |
| Preferred_Flag | boolean | NA |
Denotes whether this is the preferred log to use for this borehole among same type logs | No |
NUMBER(1) |
| Process_History_Summary | R_Process_History_Summary |
|
Summary of the log channel processing that was applied to this log channel. Examples are, Edited, Raw, Composite and Digitized. | No |
VARCHAR2(64) |
| Produced_By | STRING64 | NA |
The name of application role that created the entity, for data created programmatically. | No |
VARCHAR2(64) |
| Property_UOM | R_Unit |
|
The unit for the measurement as stored in the bulk data or offline on the original tape. | Yes |
VARCHAR2(64) |
| Rank | int | No_Unit |
An integer that defines the relative position of a Log_Channel in a sequentially ordered Log_Channel_Set. | No 1 |
NUMBER(10) |
| 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) |
| 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) |
| 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) |
| Valid_Channel_Flag | boolean | NA |
A flag value that states whether or not this instance of the channel is valid. This allows questionable data to be preserved for cleanup or validation at a later time. An example of an invalid channel occurs when incoming data attempts to load an array with an invalid or missing unit of measure. The flag value is 1 (TRUE) if the channel is valid and 0 (FALSE) if the channel is invalid by some test. The default value is 1, stating that the parameter is valid. Error messages or comments addressing invalid parameter data should be made in the Remarks attribute. Invalid channels with AXIS_FLAG = 1 (TRUE) should be rejected at load time and never be added to the database. | Yes 1 |
NUMBER(1) |
| Version | STRING255 | NA |
The form or variant of the entity. | Yes 1 |
VARCHAR2(255) |
| Cardinality | Entity |
|---|---|
| One | Log_Channel_Statistics |
| From Entity | Link | Description | Implementation Technique | Required |
|---|---|---|---|---|
| Borehole_Velocity | Log_Channel | The log channel which contains a velocity log for this borehole. | Cascade | No |
| Log_Channel_Alias | Log_Channel | An association used to define a number of aliases for a log channel. | Cascade | Yes |
| Log_Channel_Remark | Log_Channel | The log channel set to which the remarks belong. | Cascade | Yes |
| Link | To Entity | Description | Implementation Technique | Required |
|---|---|---|---|---|
| Log_Tool | Log_Tool | The tool for this log channel. | Restrict | No |
| Log_Channel_Type | R_Channel_Type | The type of log channel. Examples are Core and Discrete. | Restrict | No |
| Property_UOM | R_Unit | The unit for the measurement as stored in the bulk data or offline on the original tape. | Restrict | Yes |
| Process_History_Summary | R_Process_History_Summary | Summary of the log channel processing that was applied to this log channel. Examples are, Edited, Raw, Composite and Digitized. | Restrict | No |
| Data_Type | R_Data_Type | The identifier of the data type (integer, float, etc) of the values of the log channel. In a DLIS format file, this is the Representation Code (RCODE). | Restrict | No |
| Code | R_Log_Channel | The channel catalog code that most completely characterizes the Log_Channel. | Restrict | Yes |
| Data_Format | R_Data_Format | Internal storage format of data. Examples are 32-BIT FLOAT, and Exponential | Restrict | No |
| Log_Channel_Set | Log_Channel_Set | The Log_Channel_Set that contains this Log_Channel | Cascade | Yes |
| Discrete_Value_Set | Discrete_Value_Set | The discrete value set used to map integer values found in the bulk array storing the log channel to names. | Restrict | No |
| API_Curve_Modifier | R_API_Curve_Modifier | The code of the API curve modifier describing the pass from which the curve is derived, such as Main, Repeat(1), Repeat(2) and Calibration. | Restrict | No |