GBSetpoint for MPD

Software How To Training

Nancy DavisCarrollton

Revision 1.0

GeoBalance Training

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Module Overview

• Purpose of GBSetpoint for MPD• Calculations• Components• Data flow .. Inputs, outputs GBSetpoint• GBSetpoint : Inputs• GBSetpoint : Outputs

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GBSetpoint: What is it’s job?

Automatic calculation of appropriate pressure set point for choke through all drilling activities based on desired bottom hole pressure.

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GBSetpoint: Model

Pore Pressure

Frac Pressure

Depth

Pressure

Underbalanced

Region

TraditionalDrilling

MPD – Target BHP

Collapse Press

- Measure - Analyze

Measured BHP

Set Point Pressure

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GBSetpoint … how does it get there?

Drillstring and Well bore GeometrySurvey dataMud Density

Mud Rheology

Hole and Bit DepthFlow Rate

Stand Pipe PressureWellhead Pressure

Running Speed

Desired Pressure from well modeling.

PWD Bottom hole Pressure

Surface

Setpoint

Pressure

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Model

• How does GBSetpoint model the downhole pressure?

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ECD Equivalent Circulating Density

• ECD = Hydrostatic Pressure (weight of fluid)

□ + Friction due to flow

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Hydrostatic Pressure

• Pressure due to weight of fluid

• Hydrostatic Pressure in PSIG =

TVD in feet *

Mud Density in ppg

* 0.052

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Friction due to Flow

Friction due to flow is a function of flow rate,

Geometryand

Fluid rheology

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ECD Equivalent Circulating Density

• ECD = Hydrostatic Pressure (weight of fluid)

□ + Friction due to flow

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TED Total Equivalent Density

• TED = ECD

+ Surge … pipe moving down (increases pressure)

OR

- Swab … pipe moving up (reduces pressure) NEGATIVE

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Surge Pressure +++++++++

• What is surge pressure?Surge Pressure: When pipe moves downward with mud circulation through drill string, additional bottom hole pressure called “Surge Pressure” is created. If surge pressure is too much, many problems will occur such as formation break down, partial mud loss and lost circulation.

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Swab Pressure ---------

• What is swab pressure?Swab Pressure: If a drill string , casing string or logging tool is being pulled out of hole too fast, due to bigger diameter almost same hole size, BHA/ bit, casing or logging tool will possibly swab mud out of hole, like pulling small a piston of syringe. For this reason, hydrostatic pressure of bottom hole will be reduced. Pressure reduction created by this situation is called “Swab Pressure”.

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TED Total Equivalent Density

• TED = ECD

+ Surge … pipe moving down (increases pressure)

OR

- Swab … pipe moving up (reduces pressure) NEGATIVE

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What isn’t modeled ???

□ Does not model cuttings□ Does not model 2 phases (liquid only)□ Does not model the U-tubing effect while tripping out of the

hole.

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WHP Setpoint Calculations

• WHP Setpoint = TargetBHP – Hydrostatic Pressure– Corrected Friction Pressure

Corrected Friction Pressure = Pressure due to flow *

Friction Correction Factor+ Pressure due to pipe movement *

Surge or Swab Correction Factor

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WHPSetpoint Correction Factor

• What is the correction factor?

– Correction factor is meant to adjust setpoint for actual pressure data (PWD)

– Applied to friction component of setpoint

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What is run? Software Components

...Installed with GB Setpoint installation

…Comes with GB Setpoint

Two programs are used; GBSetpoint for Monitor and Setup and GBSetpoint Server for calculations

GB Setpoint Monitor

GB Setpoint Server

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GBSetpoint - GBSetpoint Server

• GBSetpoint needs to be installed separately to Insite• Consists of GBSetpoint Monitor and GBSetpoint Server• To start Server, from System Manager Configure->Geobalance Servers

Check Yes beside Will this Computer be running GBSetpoint?

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Behind the scenes. Running GBSetpoint Server

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GBSetpoint Monitor

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Running GBSetpoint : Running correctly

Monitor when correctly configured should look something like screen on right ….

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GBSetpoint …. Not running server

This is how GBSetpoint looks when the server is not running.

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GBSetpoint …Server Not Calculating

GB Setpoint Monitor will give an invalid configuration warning when the Server is calculating but there are invalid inputs. In the picture on the left, the Server is running but the Flow Rate in is missing.

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GBSetpoint … Missing Variable

This is the result when one of the variables is not being received into GBSetpoint.

When not receiving data, last calculated does not increase.

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Well BasedGBSPConfig

INSITE Data Records

GBSetpoint Monitor

.

GBSetpoint ServerRun Based Real Time Data

FlowWHP

Running SpeedMD/TVD

WHP

Run Based Geometry Borehole, Borehole Comp, Borehole Prm

Drillstring, Drillstring Comp, Drillstring Prm

Well Based: Mud

GBSPResultsGBSPPWDCF

GBSPDiagnosticsGPSPInputRecTS

GBSPRTInputs

Run 50 GBSPTargetEqn

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GBSetpoint: General Tab

Real-time should always be set to one second.

Recorded is best set to one second, but decreasing

won’t change real time well control.

Leakoff Test numbers are entered on this screen.

Export/Import Configuration is used to save or load all

the settings for GBSetpoint.

Check the PWD in use box if PWD is being used.

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GBSetpoint: General Tab

• Enter the results from the Leakoff

Test in order to get the

Maximum Allowable

Casing Pressure (MACP)

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GBSetpoint: Mud Editor

Well Based: Mud Record

There are 3 tabs in the Mud Editor

• General

• Rheology

Fluid Properties

Within these tabs are Mud Parameters that must be entered in

order for GB Setpoint to start calculating. These parameters will

appear in bold font that will distinguish them from the other

parameters

GBSetpoint Server

GBSetpoint

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GBSetpoint: Mud Editor

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GBSetpoint: Mud Editor

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GBSetpoint: Mud Editor

Be sure to enter the OWR in the proper format. In the event

that the OWR is entered incorrectly, a window will pop up

reminding you to put it in the correct format.

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GBSetpoint: Mud Editor

By default, the Mud Editor will only show the fluids for the active well. To enable Mud

Editor from past wells that are still saved in the data base,

click on Options and click on Show Active Well Only. This

will remove the check mark and Mud Editor will show all

past wells.

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GBSetpoint: Mud EditorIn this example there is one active well and one

past well within Mud Editor. From here you can copy past records

and paste them into the current record.

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GBSetpoint: Mud Editor• Choose the record you wish to copy. This can be a record from a past well or it can be

a record from within the current well.• Right-click and select Copy Record.

• Go to your active well and choose the fluid you wish to edit. Right-click the selection

and choose Past Record.• From here you can edit the newly copied record to reflect the most recent mud report.

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GBSetpoint: Multiple MudsGB Setpoint can model for multiple drilling fluids in the

well bore. The Muds in Well tab will display the

density and volume of the multiple muds. The

adjacent tabs will show the type of fluid that is in the well and it’s properties.

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GBSetpoint: Multiple Muds• To change fluid type or fluid

properties of a mud being pumped into the wellbore select Change Mud in the Mud Tab.

• Set Current Mud box will appear• Choose the Mud type from the

drop down box and select the Display Color.

• Or you can choose to only change the mud density of the fluid going into the wellbore. Click on Override Density and type in the new density. Select the display color and choose OK.

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GBSetpoint: Multiple Muds• After the new mud has been selected, it will

appear as long as there is an active mud flow in.

• Place the cursor over the mud and the following will appear

1. Volume2. Density3. Top of the section for that particular mud.4. Bottom of the section for that particular mud.5. The length of the section of mud.• This is true for all of the muds present in the

wellbore, not just the current mud being pumped into the drill pipe.

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GBSetpoint: Multiple Muds• To increase the volume of mud present in the wellbore, click on the “+” button and select the volume, in bbl, you wish to add to the wellbore.

GB Setpoint can only add volume, not subtract existing barrels of mud in the

wellbore.

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GBSetpoint: Multiple Muds• To quickly fill the entire wellbore with

the mud that is currently being pumped in, simply click on the “Fill” button and the drill pipe and annulus

will fill entirely with the selected mud.

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GBSetpoint Rheology Inputs

Enter Fann Dial Readings, Press calculate, and Apply

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GBSetpoint Thermal Correction• Thermal correction can be

applied to the WHP Setpoint calculation. When Thermal Correction is applied to the model it will appear highlighted, when not in use it will be grayed out and will not be used in the calculation.

• For Thermal Correction to be applied;

1. Must have a Mud Temp In and Mud Temp Out

2. At least 2 point specifying Depth and Temperature

3. Current Pump Time will determine how the Thermal Gradient is applied within the wellbore.

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GBSetpoint Thermal Correction• Choose None if there are

no temperatures available in order to apply Thermal Correction. You can still calculate the WHP Setpoint but it will not account for Thermal Correction.

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GBSetpoint Thermal Correction• Input Mud Temperature In

/Out properties. • These values can be

obtained through a data exchange or Wits.

• Or you can Force Value if you have a know temperature.

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GBSetpoint Thermal Correction• To enter points for

Formation Thermal Gradient

1. Click Edit Thermal Gradient.

2. Choose the Depth from which you obtained temperatures.

3. Select Add.4. Input depth and the

temperature at that depth.5. Click Save Edit.

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GBSetpoint Thermal Correction• You will need to enter at

least 2 points. If you have more temperatures at different depths add them to the thermal gradient.

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GBSetpoint Thermal Correction• Pump duration will

determine how much Thermal Gradient will be applied.

• You can adjust the pump time by adding or subtracting the offset.

• You can choose the offset by changing the value in the box.

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GBSetpoint: Geometry

Geometry editor is used to enter borehole and drillstring geometry.

May have multiple geometries, it which case the geometry is selected using the combo boxes.

Incorrect Geometry data is one of the biggest reasons for failure of the monitor to display the wellbore and

drillstring.

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GBSetpoint: Geometry Bit Gauge and Total Flow Area come from the bit

properties in the selected drillstring.

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Surge and Swab

• Surge or swab will not be applied when rig activity is drilling.

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Surge and Swab

• When Surge/Swab is enabled when moving the drill pipe, a green light will appear next to the corresponding activity and will apply it to the calculation.

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Surface Parameters

The Insite source for the surface parameters are selected from the

“Surface” Tab.

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Bit Depth

Total Equivalent

Density including

WHP

Total Equivalent

Density without WHP

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Target at CD

Select Change Target to

change the target ECD or Pressure

Use Override to set the desired Target

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CSV Template

Create Template will create a CSV file with the

correct format.

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CSV Template

CSV file in the correct

format.

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CSV Import

• Import previously saved CSV file.

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Control Depth

• Correction factor can be applied at the Hole Depth, Shoe or any desired depth.

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PWD

Select to Apply

Correction Factor to Setpoint

PWD is averaged for calculation of

correction factor, this is

the number of points to average.

Deviation of injection flow

from on bottom flow average for inclusion in correction

factor

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PWD

• The timer on the PWD tab indicates when the last PWD point was received when there was a change in the PWD value.

• You can average up to 20 PWD points

• Low Limit on PWD cannot be change by inputting a value. The only way to lower the limit is to lower the modeled mud weight.

• PWD Depth Offset is the distance from the bit to the PWD sensor.

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WHP Setpoint

• Lead Chokes feature will engage when flow rate decreases at a rate above the Start threshold. • Lead Chokes feature will stop when the WHP is within the limit specified in the Stop threshold, to

the WHP Setpoint.

Lead Chokes during Pumps OFF

Hold SPP

during Pumps ON

Account for

pressure drop during GeoSpan

downlink

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Realtime ResultsWhen the mud pumps are

turned on and flow is going into the drill pipe, if SPP does not go above the threshold Friction will

not turn on until SPP goes beyond the

threshold. Where you are most likely to notice this is when the Rig is filling drill pipe while Tripping in the

hole.

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Realtime Results

GB Setpoint Monitor shows that calculations

for WHP Setpoint. Correction factors that

are disabled will appear grayed out and will not be accounted for. Thermal Correction is enabled in this situation, therefore it appears in white and is

applied to the calculation.

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Realtime ResultsOn the display you

can see the calculation for the Model Pressure at the Control Depth with the correction factors applied, if applicable. Along

with the calculation for the WHP

Setpoint.

This section of the of the display will show which processes are enabled.

Anything in green is enabled. Anything in Red is not enabled.