12.11.8 StimFetTest
| Topic Version | 1 | Published | 11/11/2016 | ||
| For Standard | WITSML v2.0 | ||||
| Type: | Class | Stereotype: | «XSDcomplexType» | ||
A diagnostic test that determines fluid efficiency. Fluid efficiency test (FET).
|
Name |
Type |
Notes |
|---|---|---|
|
AnalysisMethod |
StimFetTestAnalysisMethod |
An analysis method used for this FET. |
|
DTimEnd |
TimeStamp |
End time for the FET. |
|
DTimStart |
TimeStamp |
Start time for the FET. |
|
EndPdlDuration |
TimeMeasure |
The end of the pressure-dependent leak-off portion of the FET. |
|
ExtensionNameValue |
ExtensionNameValue |
Extensions to the schema based on a name-value construct. |
|
FluidEfficiency |
VolumePerVolumeMeasure |
A measurement, derived from a data frac, of the efficiency of a particular fluid in creating fracture area on a particular formation at a set of conditions. |
|
FractureCloseDuration |
TimeMeasure |
The time at which the fracture effectively closes without proppant in place. |
|
FractureClosePres |
PressureMeasure |
The pressure at which the fracture effectively closes without proppant in place. |
|
FractureExtensionPres |
PressureMeasure |
The fracture pressure limit for an unfractured formation is the fracture initiation pressure. This is typically considered the upper bound for the minimum horizontal stress or closure pressure. A step-rate test is used to determine the fracture extension pressure. |
|
FractureGradient |
ForcePerVolumeMeasure |
The fracture gradient. |
|
FractureLength |
LengthMeasure |
The length of the fracture tip to tip; fracture half length is the length of one wing of a fracture from the wellbore to the tip. |
|
FractureWidth |
LengthMeasure |
The width of a fracture at the wellbore. Hydraulic frac width is generated by frac fluid viscosity and/or pump rate (i.e., horsepower). |
|
NetPres |
PressureMeasure |
The difference between the fracture extension pressure and the pressure that exists in the fracture. |
|
PdlCoef |
DimensionlessMeasure |
The pressure dependent leak-off coefficient. |
|
PorePres |
PressureMeasure |
The pressure of the liquids in the formation pores. |
|
PseudoRadialPres |
PressureMeasure |
The Horner plot is used to determine if pseudo-radial flow developed during pressure decline. If a semi-log straight line is observed and the line can be extrapolated to a reasonable value of reservoir pressure, then radial or pseudo-radial flow may be affecting the decline behavior. This suggests that the fracture is already closed and that data beyond the point of influence need not be considered in the evaluation of closure. |
|
ResidualPermeability |
PermeabilityRockMeasure |
That permeability which remains after a fractured formation has closed, allowing the the formation fracture face to be pressurized before the fracture is mechanically reopened. |
|
uid |
String64 |
Unique identifier for this instance of StimFetTest. |
|
Association |
Notes |
|---|---|
|
From: StimFetTest. To: StimFetTestAnalysisMethod Dependency |
|
|
From: StimJobDiagnosticSession.FluidEfficiencyTest 0..*To: StimFetTest Association |