10.0 - Plan View
A plan view gives the user access to the Well Seeker PRO’s powerful array of well planning tools. The planning tools are displayed at the bottom of the plan view and are accessed by clicking on the various radio buttons and edit boxes provided. Once the details for a planning method are entered, the calculate button should be pressed to add it to the grid.
MD INC and AZI can be entered into the grid directly if desired and this will be assumed to be an ADJ MD method. Once a planning method has been used, a solid blue line is displayed under the last line of the method and the parameters used to generate it have the parameters editable in white cells. All other cells are greyed out. Changing one of the planning method cells will force the plan line and all lines below it to recalculate. Deleting a single line of a planning method will result in all lines for the method being deleted.
Saving the plan will force the planned wellbore to be re-calculated. The planned wellbore is interpolated at the currently selected dogleg parameter, defined in the unit set.
10.1 – Planning Tools Section
The above planning tools are only available when in a plan. If the user accesses the planned wellbore, the grid is not editable and the planning tools will not be displayed.
10.2 – Adjust
MD, INC, AZI: Enter a MD, an INC and AZI in the text boxes in the parameters section.
CL, INC, AZI: Enter a CL, an INC and AZI in the text boxes in the parameters section.
INC, AZI, TVD: Enter an INC, an AZI and a TVD in the text boxes in the parameters section.
INC, AZI, DLS: Enter an INC, an AZI and a DLS in the text boxes in the parameters section.
10.3 – Build / Turn
The build / turn planning method is a 3D planning tool in which consecutive surveys have a constant build / turn rate between them. The well path produced by this method is effectively describing a trajectory travelling around a cylinder.
MD / CL: Enter an MD or CL, build rate and a turn rate and click on the “Calculate” button.
INC: Enter a build rate and a turn rate and an INC and click on the “Calculate” button.
AZI: Enter a build rate and a turn rate and an AZI and click on the “Calculate” button.
TVD: Enter a build rate and a turn rate and a TVD and click on the “Calculate” button.
10.4 – Dogleg Toolface
The dogleg tool face method is a 3D planning tool where build rates and turn rates will vary between survey stations depending on the dogleg and tool face setting requested.
MD / CL: Enter an MD / CL, DLS and TFO and click on the “Calculate” button.
INC: Enter a DLS, TFO and an INC and click on the “Calculate” button. The trajectory will be calculated until the required INC is reached. If the INC selected cannot be reached, an error will be displayed.
AZI: Enter a DLS, TFO and an AZI and click on the “Calculate” button. The trajectory will be calculated until the required AZI is reached. If the required AZI cannot be reached, an error will be displayed.
TVD: Enter a DLS, TFO and a TVD and click on the “Calculate” button. If the TVD cannot be reached, an error will be displayed.
TANGENT: There are two methods available for the tangent option:
Tangent – HC (Hold Curve): The HC option draws a tangent section then a curve to hit the target
Tangent – CH (Curve Hold): The Curve Hold draws a curve to line up on the target then a tangent to hit the target
The Curve Hold method allows a larger number of targets to be reached. A NS, EW and TVD value must be entered. This can be done manually or by selecting an existing target. Lastly the DLS of the curve must be selected. If the target cannot be reached with the parameters specified, an error will be displayed. Usually increasing the DLS allows the target to be reached or changing the method from hold curve to curve hold.
POINT: Enter a NS, EW and TVD; this can also be done by selecting an existing target from the drop-down menu. The well trajectory will be turned using the minimum possible dogleg to reach the point. This method describes a constant curve to the target. If the required point is on an existing plan, this can be achieved by selecting plan from the target details section, choosing the relevant plan from the drop-down menu and selecting the appropriate MD. This MD relates to the point on the offset plan and Well Seeker will automatically populate the NS, EW and TVD based on this selected point.
10.5 – Hold
CL: Enter a CL and click on the “Calculate” button.
MD: Enter an MD and click on the “Calculate” button.
TVD: Enter a TVD and click on the “Calculate” button.
VS: Enter a Vertical Section and click on the “Calculate” button
10.6 – Optimum Align
The optimum align function is a powerful tool for lining up on targets at specified inclinations and azimuths. It is particularly useful if multiple targets are to be hit. The trajectory produced is usually a 3D S-shape profile, which can be defined either by specifying two curve sections and a hold or by using two curves. If “Curve Hold Curve” is used, the doglegs for both the curve sections must be specified. For a “Curve-Curve” method, only the dogleg for one of the curves must be entered. If “Balanced” is selected, Well Seeker PRO will attempt to create a profile using the same dogleg for both curves.
When selecting a point to hit, the user can choose any available targets from the drop-down menu or enter the N/S, E/W and TVD values manually using the user defined option. Then select the appropriate optimum align parameters and required dogleg, and enter the desired inc and azi and click on the “Calculate” button
If there are 2 targets and the user requires the plan to “line up” the first target with the second, the second target can be selected from the line up drop-down menu. Well Seeker will calculate the tangent inc and azi between the 2 targets and automatically enter these values into the relevant boxes.
It is also possible to line up on an existing plan. When Plan is selected, the user can choose the relevant plan from the drop-down menu and the relevant MD on the plan that they would like to hit. The coordinates and TVD of the point on the plan will be automatically entered and the inc and azi will mirror that particular point on the well plan.
If the optimum align method cannot reach the desired inc and azi at the target point, an error message will be displayed. Usually increasing the doglegs will allow the target to be reached.
If the user has multiple targets to hit, then one way to achieve this is by selecting the “Thread” function in the target details section. No planning method needs to be selected to open the Thread targets dialog; however, the feature utilises the Optimum Align functions when generating plans. Targets are available to select via a drop down menu at the top of the dialog, and the planning method options are selected at the bottom of the dialog.
10.7 – 2D Planning
The 2D well planning tools are designed to allow a well from surface to be planned with a single click. The 2D planning tools have multiple build /drop rates but only one horizontal plane (azimuth). There are two options available: S-Well and Slant Well. The S-Well profile can either be a standard S where the inclination is dropped back to vertical at the target, or a modified S where a specified inclination greater than zero is reached at the target. The slant well has a constant build up rate and a specified kick off point to reach the target.
10.7.1 – S-Well
To use this method, the KOP must be entered (the inclination will be vertical to this point), the DLS of the initial build (BUR 1) and then the drop rate (BUR 2).
The user then has two additional options to choose from, final inclination (Fin Inc) and final hold length (Fin Hold). The user can choose to select none, one or both of these options via the checkbox to the right of the corresponding cell. The final details required are the target NS, EW and TVD. These can be entered manually or by selecting a target from the drop-down menu. If the target cannot be reached with the specified parameters, a warning message will be displayed.
No Checkboxes selected: When the user does not select either the Final Inclination or Final Hold options, the drop section of the plan will stop at the selected target at an inclination of 0° (if this is possible). This will be referenced in the Method Column of the plan as SWELL_OPT1.
Final Inclination Only: When the user enters only the final inclination, the drop section of the plan will stop at the selected target at the desired inclination (if this is possible). This will be referenced in the Method Column of the plan as SWELL_OPT2.
Final Hold Only: When the user enters only the final Hold, the plan will hit the target at 0° inclination (if possible) and will have lined up at the given hold distance entered prior to hitting the target. In the below example, the plan has lined up at 0° inclination 100m MD before hitting the target. This will be referenced in the Method Column of the plan as SWELL_OPT3.
Final Inclination & Hold: When the user enters both values, the plan will hit the target at the desired inclination (if possible) and will also include a hold section prior to hitting the target. In the below example, the plan has lined up at 5° inclination 100m MD before hitting the target. This will be referenced in the Method Column of the plan as SWELL_OPT4.
10.7.2 – Slant Well
To use this method, the KOP must be entered (the inclination will be vertical to this point) and the DLS of the build (BUR 1). The final details required are the target NS, EW and TVD. These can be entered manually or by selecting a target from the drop-down menu. If the target cannot be reached with the specified parameters, an error message will be displayed.
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