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WELL & ENERGY INTELLIGENCE
WELLFICENT / Public well atlas

Public well atlas

Explore documented wells and boreholes. Search source identifiers, inspect coordinates and compare available records.

Matching records
82
Distinct source well IDs
82
Source catalogues
1

Partial source coverage. Status and company roles are reported by each source, not independently verified as current. Unknown does not mean zero.

Boreholes and sidetracks may share a well ID. Counts describe these source snapshots, not market size. Catalogue labels describe the source, not territorial boundaries. Permitted locations may not have been drilled.

From records to measurements →

Research field production, groundwater levels, formations and well tests together.

Sources, rights and method ↗
Explore the map ↗

Opening the map connects to OpenStreetMap. Pins use WGS84 coordinates; accuracy varies by source. Zoom into clusters, then select a pin. Coincident records open a filtered list.

Matching records 82

Oil and gasDevelopment

Q01-HELDER-A-02-SIDETRACK1

7793 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-01-06
Oil and gasDevelopment

Q01-HELDER-A-03-SIDETRACK1

7791 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1987-12-15
Oil and gasDevelopment

Q01-HELDER-A-04-SIDETRACK1

9326 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1986-12-04
Oil and gasDevelopment

Q01-HELDER-A-04-SIDETRACK2

9327 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1986-12-11
Oil and gasDevelopment

Q01-HELDER-A-04-SIDETRACK3

7740 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1986-12-04
Oil and gasDevelopment

Q01-HELDER-A-05-SIDETRACK1

7754 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1987-04-21
Oil and gasDevelopment

Q01-HELDER-A-06-SIDETRACK1

8022 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-01-02
Oil and gasDevelopment

Q01-HELDER-A-07-SIDETRACK1

7751 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1987-03-16
Oil and gasDevelopment

Q01-HELDER-A-08-SIDETRACK1

7752 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1987-03-30
Oil and gasExploration

Q01-HELDER-A-09-SIDETRACK1

7753 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1987-04-14
Oil and gasDevelopment

Q01-HELDER-A-09-SIDETRACK2

8024 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-01-16
Oil and gasDevelopment

Q01-HELDER-A-10-SIDETRACK1

7813 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-06-06
Oil and gasDevelopment

Q01-HELDER-A-11-SIDETRACK1

7816 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-06-18
Oil and gasDevelopment

Q01-HELDER-A-12-SIDETRACK1

7817 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-06-29
Oil and gasInjection purpose

Q01-HELDER-A-13

7821 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-07-08
Oil and gasDevelopment

Q01-HELDER-A-14

8011 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1990-11-13
Oil and gasDevelopment

Q01-HELDER-A-14-SIDETRACK1

8103 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1990-12-11
Oil and gasDevelopment

Q01-HELDER-A-15

8013 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1990-11-14
Oil and gasDevelopment

Q01-HELDER-A-16

8014 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1990-11-16
Oil and gasDevelopment

Q01-HELDER-A-16-SIDETRACK1

8028 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.920679 / 4.097089Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-01-25
Oil and gasDevelopment

Q01-HELDER-B-01-SIDETRACK1

7065 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.928352 / 4.074923Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1987-04-29
Oil and gasDevelopment

Q01-HELM-A-02-SIDETRACK1

7757 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.871712 / 4.140827Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1987-05-16
Oil and gasDevelopment

Q01-HELM-A-02-SIDETRACK2

7826 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.871712 / 4.140827Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-08-12
Oil and gasDevelopment

Q01-HELM-A-02-SIDETRACK3

7827 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.871712 / 4.140827Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-08-22
Oil and gasDevelopment

Q01-HELM-A-03-SIDETRACK1

8134 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.871712 / 4.140752Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1993-02-08
Oil and gasDevelopment

Q01-HELM-A-04-SIDETRACK1

7995 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.871685 / 4.140767Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1990-08-08
Oil and gasDevelopment

Q01-HELM-A-05-SIDETRACK1

8031 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.871694 / 4.140826Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-02-18
Oil and gasDevelopment

Q01-HELM-A-09

7921 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.871676 / 4.140811Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1989-04-25
Oil and gasDevelopment

Q01-HELM-A-09-SIDETRACK1

8030 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.871676 / 4.140811Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-03-15
Oil and gasDevelopment

Q01-HOORN-A-04-SIDETRACK1

8042 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-05-01
Oil and gasDevelopment

Q01-HOORN-A-04-SIDETRACK2

8048 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-05-07
Oil and gasDevelopment

Q01-HOORN-A-08

7985 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-09-05
Oil and gasDevelopment

Q01-HOORN-A-08-SIDETRACK1

7986 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-09-17
Oil and gasDevelopment

Q01-HOORN-A-08-SIDETRACK2

7834 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1988-09-20
Oil and gasDevelopment

Q01-HOORN-A-08-SIDETRACK3

8150 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1989-06-04
Oil and gasDevelopment

Q01-HOORN-A-08-SIDETRACK4

7928 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1989-06-17
Oil and gasDevelopment

Q01-HOORN-A-08-SIDETRACK5

8161 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1989-06-19
Oil and gasDevelopment

Q01-HOORN-A-09

8035 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-03-26
Oil and gasDevelopment

Q01-HOORN-A-09-SIDETRACK1

8041 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-04-07
Oil and gasDevelopment

Q01-HOORN-A-09-SIDETRACK2

8156 · TNO / NLOG — Netherlands boreholes

Latitude / longitude (WGS84)52.924575 / 4.149044Operator in source snapshot: Unocal Netherlands B.V.Recorded spud date: 1991-04-13

Dataset library

Each dataset retains its source, access date, row count and reuse conditions. Filtered NDJSON is available for algorithm development.

Sources and methodology

Public administrative records are normalized with stable source identifiers. Original operators, drilling contractors and reported owners remain separate roles. Dates describe source access or reported events; they do not establish live activity. Coordinates are transformed to WGS84 where needed. Confidential records and personal owner fields are excluded. See each source for coverage, attribution and reuse terms.

NSTA data remains subject to source terms. The onshore agreement permits non-commercial use; the offshore layer has no item-level licence specified. Review each source before commercial use or redistribution.

Record details

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