| 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 / Measurement | 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_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. This GUID is not generated by the database, but is the GUID used by the application on first access of this object. Use of this property is optional and completely under the control of application developers. | 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. | No |
VARCHAR2(64) |
| Process_History_Summary | CODE NA |
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 |
ID of the activity that was executing when the entity was created, 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 entity"s 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 |
| Link | To Entity | Description | Implementation Technique | Required |
|---|---|---|---|---|
| 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 |
| Property_UOM | R_Unit | The unit for the measurement as stored in the bulk data or offline on the original tape. | Restrict | Yes |
| Log_Tool | Log_Tool | The tool for this log channel. | Restrict | No |
| Code | R_Log_Channel | The channel catalog code that most completely characterizes the Log_Channel. | Restrict | Yes |
| 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 |
| 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 |
| Log_Channel_Type | R_Channel_Type | The type of log channel. Examples are Core and Discrete. | Restrict | No |