| Name | Survey_Point_Detail |
|---|---|
| Entity Type | Extension of Deviation_Survey_Point |
| Description | Detailed information regarding the processing of a deviation survey point. |
| Submodel | Deviation_Survey |
| Entity Scope | Project |
| Primary Key | Deviation_Survey_Point_Id |
| Natural Key | |
| Generalizations | Tracked_Object |
| Specializations |
| Name | Value Domain | Property / Storage Unit | Description | Required / Default | Type |
|---|---|---|---|---|---|
| Along_Hole_Departure | double | Length m |
Along hole departure or displacement is the sum of the displacement between individual survey stations | No |
NUMBER |
| Build_Rate | double | Well_Curvature deg/30m |
Build Rate, radius of curvature computation | No |
NUMBER |
| Closure_Azimuth | double | Plane_Angle deg |
The azimuth of a straight line, in a horizontal plane containing the last station of the survey, drawn from the projected surface location to the last station of the survey | No |
NUMBER |
| Closure_Length | double | Length m |
Length of wellpath projected on horizontal plane | No |
NUMBER |
| Course_Length | double | Length m |
The difference in measured depth or actual hole length from one station to another. | No |
NUMBER |
| Delta_MD | double | Depth m |
Measured depth from previous point. | No |
NUMBER |
| Delta_TVD | double | Depth m |
True vertical depth from previous point. | No |
NUMBER |
| Delta_X | double | Length m |
Distance from previous point in x-direction | No |
NUMBER |
| Delta_Y | double | Length m |
Distance from previous point in y-direction | No |
NUMBER |
| Depth_Correction_Flag | boolean | NA |
Was a sensor offset relative to bit applied to survey computation | No |
NUMBER(1) |
| Deviation_Survey_Point_Id | Deviation_Survey_Point |
|
An association to show the detail information for a Deviation Survey Point | Yes |
NUMBER(38) |
| Dip_Angle_Uncertainty | double | Plane_Angle deg |
survey tool dip uncertainty | No |
NUMBER |
| Dir_Difficulty_Index | double | No_Unit |
Drilling difficulty index is used to predict if a well plan will be difficult to drill. (DDI=LOG10(MD*AHD*Tortuosity/TVD) | No |
NUMBER |
| Dog_Leg_Angle | double | Plane_Angle deg |
The change in wellbore curvature between any two points, expressed in degrees | No |
NUMBER |
| Dog_Leg_Over_Delta | double | No_Unit |
DLSH is measurement of dogleg (DL) over delta H, which is a length of projected curve on horizontal plane: DL/deltaH | No |
NUMBER |
| Dog_Leg_Severity | double | Well_Curvature deg/30m |
Dogleg severity | No |
NUMBER |
| Drlstr_Mag_Correction_Flag | boolean | NA |
Was a drillstring magnetism correction applied to survey computation | No |
NUMBER(1) |
| Error_Model_Method | STRING64 | NA |
Survey Error Method assigned to this deviation survey row. Examples are Wolff and deWardt, Shell, Simple Cone, Statoil, Topographic. | No |
VARCHAR2(64) |
| Gravity_Accelerometer_Flag | boolean | NA |
Was an accelerometer alignment correction applied to survey computation | No |
NUMBER(1) |
| Gravity_Toolface_Angle | double | Plane_Angle deg |
The angle of the face of the gravity tool | No |
NUMBER |
| Gravity_Total_Uncertainty | double | Acceleration m/s2 |
survey tool gravity uncertainty | 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) |
| Mag_Axial_Correction_Flag | boolean | NA |
Was a magnetometer alignment correction applied to survey computation | No |
NUMBER(1) |
| Mag_Total_Uncertainty | double | Magnetic_Flux_Density mT |
survey tool magnetic uncertainty | No |
NUMBER |
| Magnetic_Toolface_Angle | double | Plane_Angle deg |
The angle of the face of the magnetic tool | No |
NUMBER |
| Max_DLS | double | Well_Curvature deg/30m |
The maximum dogleg severity requested for planning the well trajectory | No |
NUMBER |
| Min_DLS | double | Well_Curvature deg/30m |
The minimum dogleg severity requested for planning the well trajectory | No |
NUMBER |
| Produced_By | STRING64 | NA |
The name of application role that created the entity, for data created programmatically. | No |
VARCHAR2(64) |
| SDAT_Label | int | No_Unit |
Label used by the security system for entitlements. SDAT is Secure Data Access Technology. | No |
NUMBER(10) |
| Sag_Correction_Flag | boolean | NA |
Was a BHA sag correction applied to the survey computation | No |
NUMBER(1) |
| Station_Type | STRING64 | NA |
The type of station and input method that was used. For example, HOLD_TO_MD, HOLD_TO_TVD, CURVE_TO_TVD_INCL_AZIM | No |
VARCHAR2(64) |
| Tool_Description | STRING255 | NA |
A description of the tool used for the determination of this measurement | No |
VARCHAR2(255) |
| Tool_Error_Model | STRING64 | NA |
Survey Tool Error Model assigned to this deviation survey row. E.g. MWD, Incl_only | No |
VARCHAR2(64) |
| Tool_Type | STRING64 | NA |
The type of Tool used to measure this point. This can be as basic as ""magnetic"" or ""gyro"" or more specific such as MWD=measurement-while-drilling, EMS=electronic-multi-shot, NSG=north-seeking-gyro, SS=single-shot, inclination-only, etc. This is a denormalization of the data held at the survey acquisition level. | No |
VARCHAR2(64) |
| Tortuosity | double | No_Unit |
A cumulative value to reflect the total curvature imposed on the wellbore | No |
NUMBER |
| Turn_Rate | double | Well_Curvature deg/30m |
Turn rate, radius of curvature comp | No |
NUMBER |
| 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) |
| Vertical_Section_Length | double | Length m |
Horizontal distance from wellhead to survey point | No |
NUMBER |
| Link | To Entity | Description | Implementation Technique | Required |
|---|---|---|---|---|
| Deviation_Survey_Point | Deviation_Survey_Point | An association to show the detail information for a Deviation Survey Point | Cascade | Yes |