| Name | Borehole_Velocity |
|---|---|
| Entity Type | Table |
| Description | A velocity associated with a borehole which is not a checkshot, typically a sonic log or velocity log or stored as velocity function pairs (time-depth, velocity-depth, or time-velocity). |
| Submodel | Velocity |
| Entity Scope | Project |
| Primary Key | Id |
| Natural Key | |
| Generalizations | Velocity_Function , Entity , IT_Object , Tracked_Object |
| Specializations |
| Name | Value Domain / Measurement | Description | Required / Default | Type |
|---|---|---|---|---|
| Area_Of_Validity_Id | Area |
The area in which the velocity function is considered valid. | No |
NUMBER(38) |
| Borehole_Id | Borehole |
The borehole to which the borehole velocity function applies. | No |
NUMBER(38) |
| Correction_Velocity | double Acoustic_Velocity |
The velocity used to correct this function to the datum. | No |
NUMBER |
| Datum_Elevation | double Length |
The elevation of the datum to which the velocity - Z pairs are referenced. This may differ from the Seismic Reference Datum. The elevation is relative to the Vertical_Reference of the Velocity_Set | No |
NUMBER |
| 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) |
| Index_Correction | double No_Unit |
Delta index correction value in the same units as the INDEX channel (time or depth). This value, when added to the INDEX vector values can be used for correction from the function datum to the set datum this correction can be performed even if the Datum_Elevation is null. Times are always two-way acoustic travel times. | No |
NUMBER |
| 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_Id | Log_Channel |
The log channel which contains a velocity log for this borehole. | 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 |
ID of the activity that was executing when the entity was created, for data created programmatically. | No |
VARCHAR2(64) |
| 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) |
| Value_Property | R_Property |
The property of the function value, such as interval velocity or two way time. | No |
VARCHAR2(64) |
| Velocity_Set_Id | Velocity_Set |
The collection of velocities to which this velocity location belongs, if any. | No |
NUMBER(38) |
| Velocity_Source | R_Velocity_Source |
The source of the velocity data. Seismic, Seismic DMO, Seismic Migration, Pseudo Velocity, Sonic Log, Borehole (VSP,checkshot), Computed, and Refraction are the options. | No |
VARCHAR2(64) |
| Version | STRING255 NA |
The form or variant of the entity. | Yes 1 |
VARCHAR2(255) |
| From Entity | Link | Description | Implementation Technique | Required |
|---|---|---|---|---|
| Velocity_Function_Pair | Borehole_Velocity | The velocity location to which this velocity function pair belongs. Only one of Survey_2D_Velocity, a Survey_3D_Velocity, Borehole_Velocity or Generic_Velocity should be specified. | Cascade | No |
| Link | To Entity | Description | Implementation Technique | Required |
|---|---|---|---|---|
| Borehole | Borehole | The borehole to which the borehole velocity function applies. | Cascade | No |
| Log_Channel | Log_Channel | The log channel which contains a velocity log for this borehole. | Cascade | No |
| Velocity_Set | Velocity_Set | _ | Cascade | No |
| Area_Of_Validity | Area | _ | Control | No |
| Value_Property | R_Property | _ | Restrict | No |
| Velocity_Source | R_Velocity_Source | _ | Restrict | No |