Core

[Columns] [Composed Of] [Referenced By] [Refers To]

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 , Top_Depth , Existence_Kind , Version
Generalizations	Rock_Sample , Entity , IT_Object , Tracked_Object
Specializations

Columns

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Name	Value Domain / Measurement	Description	Required / Default	Type
Base_Depth	double Depth	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 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)
Conv_Core_Acquisition_Id	Conv_Core_Acquisition	The wellsite activity that produced this core.	No	NUMBER(38)
Core_Diameter	double Length	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)
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)
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	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	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	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	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 operator, that uniquely identifies the core within a wellbore path.	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	ID of the activity that was executing when the entity was created, for data created programmatically.	No	VARCHAR2(64)
Recovered_Length	double Length	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)
SDAT_Label	int No_Unit	Label used by the security system for entitlements. SDAT is Secure Data Access Technology.	No	NUMBER(10)
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 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)
Sub_Type	Meta_Entity	Sub type of Rock_Sample	No	VARCHAR2(30)
Top_Depth	double Depth	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)

Composed Of

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Cardinality	Entity
Many	Core_Preservation

Referenced By

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From Entity	Link	Description	Implementation Technique	Required
Core_Segment	Parent_Rock_Sample	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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Link	To Entity	Description	Implementation Technique	Required
Conv_Core_Acquisition	Conv_Core_Acquisition	The wellsite activity that produced this core.	Restrict	No
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
Borehole	Borehole	The borehole that produced this core.	Cascade	No

[Seabed Objects] [Entities in Schema Seabed] [Index]

Core

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