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Field Definitions for ALASKA DIRECTIONAL SURVEY (POINTS) RUN OVER NIGHT

Field Definitions for ALASKA DIRECTIONAL SURVEY (POINTS) RUN OVER NIGHT

Click on hyperlinked Column Aliases to show possible values.

The Start Position Column is used for fixed dumps only. Click on the column alias for a valid list of values or codes associated with the element selected.

Start
Position
Item
Length
Column
Alias
Definition
1 20 Api Well Number API_WELL_NUMBER - A unique well identification number consisting of (from left to right) a two digit state code (or pseudo for Offshore), a three digit county code (or pseudo for Offshore), a five digit unique well code, and if applicable, a two digit sidetrack code as defined in API Bulletin D12A.
21 19 Incl Ang Deg Val INCL_ANG_DEG_VAL -The angular measurement that the borehole deviates from vertical.
40 18 Incl Ang Min Val INCL_ANG_MIN_VAL -The angular measurement, in minutes, a well bore deviates from vertical.
58 16 Survey Point Md SURVEY_POINT_MD -The measured depth from the rig's kelly bushing to the survey point.
74 1 Well N S Code WELL_N_S_CODE -Indicates whether the borehole location is measured from the north or south block boundary.
75 19 Dir Deg Val DIR_DEG_VAL -The coordinate drift direction a well bore deviates from a north-south reference line.
94 19 Dir Mins Val DIR_MINS_VAL -The drift direction, a well bore deviates from either a north-south reference line or true north.
113 1 Well E W Code WELL_E_W_CODE -East/West descriptor that indicates the direction of a measurement from an identifiable line./Indicates whether the borehole location is measured from the east or west block boundary.
114 16 Survey Point Tvd SURVEY_POINT_TVD -The true vertical depth from the rig's kelly bushing to the survey point.
130 19 Delta X (delta lon from surface) DELTA_X -Unknown
149 19 Delta Y (delta lat from surface) DELTA_Y -Unknown
168 19 Longitude This field is derived from the expression... BV.SURF_LONGITUDE + dsp.delta_x ...and consists of these database columns:
SURF_LONGITUDE - The longitude value of a location in a borehole. A positive value denotes east. Angle measured about the spheroid axis from a local prime meridian to the meridian through the point.
delta_x - Unknown
187 19 Latitude This field is derived from the expression... BV.SURF_LATITUDE + dsp.delta_y ...and consists of these database columns:
SURF_LATITUDE - The latitude value of a location in the borehole. A positive value denotes north. Angle subtended with equatorial plane by a perpendicular from a point on the surface of a spheriod.
delta_y - Unknown