| 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 |
| Name | Value Domain / Measurement | Description | Required / Default | Type |
|---|---|---|---|---|
| Below_Packer_Mass | double Mass |
Total amount of gravel that remains below the packer. | No |
NUMBER |
| Damage_Skin_Pressure | double Pressure |
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 |
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 |
(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 |
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 |
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 |
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 |
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 |
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 |
Surface pressure when the fracture occurs | No |
NUMBER |
| Fracture_Width | double Length |
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. 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) |
| In_Formation_Mass | double Mass |
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 |
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 |
ID of the activity that was executing when the entity was created, for data created programmatically. | No |
VARCHAR2(64) |
| Proppant_In_Fracture_Mass | double Mass |
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 |
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 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) |
| 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) |
| Link | To Entity | Description | Implementation Technique | Required |
|---|---|---|---|---|
| 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 |