Core


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General Information

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Name Core
Entity Type View
Description A rock sample obtained by drilling into the earth with a pipe conveyed hollow bit and core barrel. Full recovery of a conventional core is typically 30 feet in length.
Submodel Rock_Sample
Entity Scope Project
Primary Key Id
Natural Key Conv_Core_Acquisition_Id , Borehole_Id , Opr_Sample_Number , Top_Depth , Existence_Kind , Version
Generalizations Rock_Sample , Entity , IT_Object , Tracked_Object
Specializations


Columns

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NameValue DomainProperty /
Storage Unit
DescriptionRequired /
Default
Type
Base_Depth double Depth
m
The depth measurement that represents the base of the rock sample. This is the deepest or last encountered sample depth along the borehole path and is not related to stratigraphic position. Yes
NUMBER
Borehole_Id Borehole
The identifier of the borehole that produced this core. No
NUMBER(38)
Box_Number CODE NA
A value that uniquely identifies the container in which the sample is stored. No
VARCHAR2(64)
Cabinet_Number int NA
The number of the cabinet in which the sample is stored. No
NUMBER(10)
Conv_Core_Acquisition_Id Conv_Core_Acquisition
The identifier of the wellsite activity that produced this core. No
NUMBER(38)
Core_Diameter double Cylinder_Diameter
mm
A measurement that represents the diameter of the recovered core. No
NUMBER
Core_Exposure_Remarks STRING255 NA
A free text description of the time duration and climate conditions to which the core was exposed prior to preservation at the wellsite. No
VARCHAR2(255)
Core_Slab_Flag boolean NA
A flag to denote whether a particular core has been slabbed or not. 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)
Gamma_Corr_Flag boolean NA
An indicator that specifies whether or not a core gamma log was acquired from this core. 1 = core gamma log was acquired; 0 = core gamma log was not acquired. No
NUMBER(1)
Gamma_Corr_Remarks STRING255 NA
Free-form text comments about the acquisition of the core gamma log. No
VARCHAR2(255)
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)
Max_Dip double Plane_Angle
deg
A measurement that represents the maximum dip angle of a bedding surface over the entire length of the core. True dip is measured perpendicular to the line of strike in a vertical plane. Only oriented core allow for measurement of dip directions and are generally made with a goniometer. No
NUMBER
Max_Dip_Azimuth double Plane_Angle
deg
A measurement that represents the least dip direction value observed over the entire core length. Dip direction is measured in a horizontal plane parallel to dip. Azimuth is measured as a clockwise angle of departure from true (geographic) north, in a horizontal plane. Only oriented core allow for measurement of dip directions and are generally made with a goniometer. No
NUMBER
Min_Dip double Plane_Angle
deg
A measurement that represents the minimum dip angle of a bedding surface over the entire length of the core. True dip is measured perpendicular to the line of strike in a vertical plane. Only oriented core allow for measurement of dip directions and are generally made with a goniometer. No
NUMBER
Min_Dip_Azimuth double Plane_Angle
deg
A measurement that represents the least dip direction value observed over the entire core length. Dip direction is measured in a horizontal plane parallel to dip. Azimuth is measured as a clockwise angle of departure from true (geographic) north, in a horizontal plane. Only oriented core allow for measurement of dip directions and are generally made with a goniometer. No
NUMBER
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)
Opr_Sample_Number CODE NA
An identifier, assigned by the well operator, that uniquely identifies the sample. No
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)
Other_Services_Desc STRING255 NA
Description of other services provided for the portrayal or depiction of rock sample properties. Examples include, Photography and X-Ray scanning. No
VARCHAR2(255)
Produced_By STRING64 NA
The name of application role that created the entity, for data created programmatically. No
VARCHAR2(64)
Rack_Number int NA
The number of the rack in which the sample is stored. No
NUMBER(10)
Recovered_Length double Length
m
A measurement that represents the length of the core that was recovered from the core acquisition activity. No
NUMBER
Remarks STRING2000 NA
Any type of remarks added to an entity instance. No
VARCHAR2(2000)
Row_Number int NA
The number of the row in which the sample is stored No
NUMBER(10)
SDAT_Label int No_Unit
Label used by the security system for entitlements. SDAT is Secure Data Access Technology. No
NUMBER(10)
Sample_Condition STRING64 NA
A textual description of the condition of the sample No
VARCHAR2(64)
Sample_Quality R_Sample_Quality
A value that describes the visually estimated quality of the core. Valid values are: GOOD, FAIR, POOR. A good cuttings quality implies the sample is representative of the formation and should provide accurate analysis. A fair core quality implies some damage during the sample acquisition process but suitability for analysis. A poor core quality implies significant damage or contamination and a sample that is unsuitable for most analysis. No
VARCHAR2(64)
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)
Storage_Location STRING64 NA
The name of the location where the sample is stored. No
VARCHAR2(64)
Sub_Type Meta_Entity
Sub type of Rock_Sample No
VARCHAR2(30)
Top_Depth double Depth
m
The depth measurement that represents the top of the rock sample. This is the shallowest or first encountered sample depth along the borehole path and is not related to stratigraphic position. Yes
NUMBER
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)
Version STRING255 NA
The form or variant of the entity. Yes
1
VARCHAR2(255)


Referenced By

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From EntityLinkDescriptionImplementation TechniqueRequired
Core_Preservation Rock_Sample The identifier of the core sample that was preserved. Cascade Yes
Core_Segment Parent_Rock_Sample The identifier of the parent core from which this core segment sample was extracted. Cascade Yes
Plug_Analysis_DOV Core READ ONLY: Unique identifier for the Core. Nullify No
Plug_DOV Core READ ONLY: Unique identifier for the Core. Nullify No


Refers To

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LinkTo EntityDescriptionImplementation TechniqueRequired
Sample_Quality R_Sample_Quality A value that describes the visually estimated quality of the core. Valid values are: GOOD, FAIR, POOR. A good cuttings quality implies the sample is representative of the formation and should provide accurate analysis. A fair core quality implies some damage during the sample acquisition process but suitability for analysis. A poor core quality implies significant damage or contamination and a sample that is unsuitable for most analysis. Restrict No
Conv_Core_Acquisition Conv_Core_Acquisition The identifier of the wellsite activity that produced this core. Restrict No
Borehole Borehole The identifier of the borehole that produced this core. Cascade No


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