Stimulation_Evaluation

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

General Information

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Name Stimulation_Evaluation
Entity Type Table
Description The results of tests performed after the stimulation or stimulation stage activity is completed.
Submodel Stimulation
Entity Scope Project
Primary Key Id
Natural Key
Generalizations Entity , IT_Object , Tracked_Object
Specializations


Columns

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NameValue DomainProperty /
Storage Unit		DescriptionRequired /
Default		Type
Below_Packer_Mass double Mass
kg		 Total amount of gravel that remains below the packer. No
 NUMBER
Damage_Skin_Pressure double Pressure
kPa		 The drop in pressure due to skin damage. Damage Skin (generally know as Skin or Skin Damage) refers to the reduction of formation permeability in close proximity to the wellbore as a result of drilling and/or completion activities. Skin Damage is generally overcome using matrix, acidizing and/or fracturing stimulation treatments. Note: A positive value indicates a restriction to flow while a negative value indicates flow enhancement, usually the result of stimulation. Natural fractures can sometimes result in a positive skin. No
 NUMBER
Deviated_Skin_Pressure double Pressure
kPa		 The drop in pressure due to skin deviation. Deviated Skin Damage is related to the reduction in formation permeability in close proximity to the wellbore as a result of the well path that is non perpendicular to the bedding plan of the formation (or the well path is not orientated to the natural stress orientation of the formation). If the perforations are not oriented properly, the induced fracture has to turn from the perforations and become oriented with the maximum stress plane. No
 NUMBER
Effective_Length double Length
m		 (This is commonly called the hydraulic length) The length of the fracturing fluids penetrations down the fracture. Typically the fluid length is greater than the distance traveled by the proppant except in the case of a tip screen out. 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)
Expected_Permeability double Permeability
mD		 The expected permeability of the reservoir that is being stimulated. Usually, this is the permeability calculated by the reservoir engineer when the treatment was designed. No
 NUMBER
Fracture_Conductivity double Conductivity
mS/m		 The Fracture Conductivity is the measure of the proppant pack capability to transmit reservoir fluids to the wellbore. The unit of measurement is typically permeability time length (i.e. md-in). Fracture Conductivity = fracture permeability times the average width of the fracture. Note: Fracture Conductivity is time dependent as the effective stress is changed during drawdown which changes the pore pressures. No
 NUMBER
Fracture_Height double Length
m		 The vertical dimension of a hydraulic fracture. This value is typically measured at the wellbore and often bounded by a barrier formation above and below the fracture. Various fracture geometry models can have different height profiles along the fracture length. No
 NUMBER
Fracture_Length double Length
m		 The length of fracture with sufficient conductivity above formation permeability to effectively transmit reservoir fluids to the wellbore. The effective fracture length can be less than the fracture length do to the proppant becoming embedded in fracture face or through fines or particles plugging the fracture pack. Note: If the initial fracture is not wide enough or etched away enough, when the pump pressure is taken away the closure will result in a much shorter fracture length. No
 NUMBER
Fracture_Orientation_Degree double Plane_Angle
deg		 The angle of the fractures. The fracture orientation can be vertical or horizontal and describes how the fracture surface with the most exposure to the formation is position in the formation. The fracture orientation will be perpendicular to the least principle stress in the formation. The most common orientation is vertical (if the fracture injection pressure is less than the overburden pressure, which it usually is). Formations with higher overburden pressure, fracture gradients > 1.0, will have a horizontal orientation. No
 NUMBER
Fracture_Pressure double Pressure
kPa		 Surface pressure when the fracture occurs No
 NUMBER
Fracture_Width double Length
m		 The cross section length of the fracture where it intersects with the wellbore. The fracture width is always measure perpendicular to the fracture orientation. Some fracture geometry models assume that the fracture width gets smaller as the fracture moves away from the wellbore. No
 NUMBER
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)
In_Formation_Mass double Mass
kg		 Total amount of gravel that remains in the formation after the pressure is released. 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)
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)
Penetration_Radius double Length
m		 The penetration radius is the horizontal fracture equivalent to the vertical fracture half-length. The horizontal fractures typically grow in a "pancake" shaped geometry. No
 NUMBER
Perforation_Skin double No_Unit
 Perforation skin factor before the stimulation activity. This accounts for additional pressure drops in the immediate vicinity of a well in well performance calculations, such as transient pressure test analysis. Positive skin effects indicate damaged conditions. Negative skin effects indicate stimulated conditions. [POSC] No
 NUMBER
Post_Stimulation_Skin double No_Unit
 The perforation skin factor after the stimulation activity is completed. The skin factor accounts for additional pressure drops in the immediate vicinity of a well in well performance calculations, such as transient pressure test analysis. Positive skin effects indicate damaged conditions. Negative skin effects indicate stimulated conditions. [POSC] No
 NUMBER
Produced_By STRING64 NA
 The name of application role that created the entity, for data created programmatically. No
 VARCHAR2(64)
Proppant_In_Fracture_Mass double Mass
kg		 Solid mass or weight of proppant per unit area. The amount of proppant that clears the wellbore and is deposited somewhere along the fracture. No
 NUMBER
Propped_Length double Length
m		 The length of the fracture that contains sufficient proppant to keep the fracture from closing once the hydraulic pressure is released. 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)
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)
Stimulation_Activity_Id Stimulation
The stimulation job for which the stimulation evaluation test was performed. No
 NUMBER(38)
Stimulation_Stage_Id Stimulation_Stage
The stimulation stage for which the stimulation evaluation test was performed. No
 NUMBER(38)
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)


Refers To

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LinkTo EntityDescriptionImplementation TechniqueRequired
Stimulation_Activity Stimulation The stimulation job for which the stimulation evaluation test was performed. Cascade No
Wellsite_Activity Wellsite_Activity The identifier of the wellsite activity that performed this stimulation evaluation. Assoc to One No
Stimulation_Stage Stimulation_Stage The stimulation stage for which the stimulation evaluation test was performed. Cascade No


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