WELLFICENT

Drilling cycles and oil price

Compare source-reported spud years with the Brent annual average on one timeline.

Index of Oil and Gas Wells in IsraelTNO / NLOG — Netherlands boreholesNZ Petroleum & Minerals — Public petroleum wellsNorwegian Offshore Directorate — WellboresNSTA — UK offshore wellbore top holesNSTA — England onshore wellbore top holesPartial year in source snapshotBrent annual average (USD per barrel, nominal)Counts are records whose source reports a spud date; sidetracks are separate records. Records without dates are not counted. The snapshot year is partial; later years are not covered. Catalogues without spud dates: CalGEM — California public geothermal wells, BC Energy Regulator — Public well surface holes, UFZ — Jordan Water Wells.

Read chart values

Year	Total	Index of Oil and Gas Wells in Israel	TNO / NLOG — Netherlands boreholes	NZ Petroleum & Minerals — Public petroleum wells	Norwegian Offshore Directorate — Wellbores	NSTA — UK offshore wellbore top holes	NSTA — England onshore wellbore top holes	Brent	Open in atlas
2026 Partial year in source snapshot	191	—	16	0	133	42	0	—	Open in atlas
2025	377	—	17	0	319	41	0	69.14	Open in atlas
2024	266	—	19	0	200	44	3	80.52	Open in atlas
2023	331	—	25	0	231	70	5	82.49	Open in atlas
2022	290	—	30	0	197	59	4	100.93	Open in atlas
2021	365	—	15	0	284	66	0	70.86	Open in atlas
2020 Partial year in source snapshot	354	0	19	1	258	74	2	41.96	Open in atlas
2019	474	5	22	0	284	158	5	64.30	Open in atlas
2018	419	1	27	1	279	108	3	71.34	Open in atlas
2017	387	5	36	5	238	97	6	54.13	Open in atlas
2016	369	2	29	2	216	115	5	43.64	Open in atlas
2015	500	6	56	8	258	164	8	52.32	Open in atlas
2014	537	1	63	45	240	169	19	98.97	Open in atlas
2013	519	5	52	34	239	176	13	108.56	Open in atlas
2012	524	10	49	36	224	188	17	111.63	Open in atlas
2011	559	22	75	51	206	174	31	111.26	Open in atlas
2010	547	7	70	45	204	202	19	79.61	Open in atlas
2009	640	7	68	48	279	213	25	61.74	Open in atlas
2008	634	1	29	36	248	294	26	96.94	Open in atlas
2007	627	0	58	48	211	290	20	72.44	Open in atlas
2006	611	2	50	49	195	294	21	65.16	Open in atlas
2005	636	4	40	51	186	325	30	54.57	Open in atlas
2004	506	3	33	43	166	243	18	38.26	Open in atlas
2003	544	2	55	19	195	251	22	28.85	Open in atlas
2002	628	7	48	24	195	322	32	24.99	Open in atlas
2001	702	6	48	21	238	361	28	24.46	Open in atlas
2000	612	10	46	28	213	295	20	28.66	Open in atlas
1999	588	6	51	15	215	281	20	17.90	Open in atlas
1998	702	5	75	21	176	383	42	12.76	Open in atlas
1997	740	7	94	14	201	375	49	19.11	Open in atlas
1996	771	4	97	17	190	425	38	20.64	Open in atlas
1995	718	10	87	15	155	416	35	17.02	Open in atlas
1994	609	11	54	16	174	334	20	15.86	Open in atlas
1993	585	8	64	22	167	314	10	17.01	Open in atlas
1992	579	5	76	15	142	326	15	19.32	Open in atlas
1991	660	3	104	10	134	395	14	20.04	Open in atlas
1990	686	3	107	12	122	404	38	23.76	Open in atlas
1989	669	4	110	13	122	377	43	18.23	Open in atlas
1988	692	3	104	26	116	395	48	14.91	Open in atlas
1987	623	5	92	27	148	310	41	18.53	Open in atlas
1986	568	9	114	21	114	242	68	—	Open in atlas
1985	725	6	160	27	116	346	70	—	Open in atlas
1984	699	10	176	18	93	361	41	—	Open in atlas
1983	562	25	148	19	64	286	20	—	Open in atlas
1982	580	17	148	6	87	297	25	—	Open in atlas
1981	529	11	138	7	59	280	34	—	Open in atlas
1980	533	17	160	5	73	250	28	—	Open in atlas
1979	432	9	138	3	71	201	10	—	Open in atlas
1978	448	9	125	20	73	209	12	—	Open in atlas
1977	436	21	112	2	56	237	8	—	Open in atlas
1976	357	11	125	6	31	176	8	—	Open in atlas
1975	378	11	118	12	50	163	24	—	Open in atlas
1974	327	3	107	5	52	149	11	—	Open in atlas
1973	221	3	82	3	23	92	18	—	Open in atlas
1972	234	4	101	11	16	93	9	—	Open in atlas
1971	215	8	100	9	16	72	10	—	Open in atlas
1970	177	10	66	10	21	61	9	—	Open in atlas
1969	188	8	56	10	14	94	6	—	Open in atlas
1968	163	10	52	3	12	81	5	—	Open in atlas
1967	163	14	56	5	6	77	5	—	Open in atlas
1966	127	12	56	3	2	35	19	—	Open in atlas
1965	152	27	86	4	0	10	25	—	Open in atlas
1964	136	19	77	13	0	1	26	—	Open in atlas
1963	86	18	42	5	0	0	21	—	Open in atlas
1962	85	12	37	3	0	0	33	—	Open in atlas
1961	79	9	31	2	0	0	37	—	Open in atlas
1960	115	21	54	2	0	0	38	—	Open in atlas

Select one catalogue to see the depth trend; reference levels of different catalogues are not mixed.

Price and drilling co-movement

Correlation of annual changes: the Brent log change against the log change in record counts, with 0–2 year lags. Square brackets show the 95% confidence interval.

Catalogue	Years	0-year lag	1-year lag	2-year lag
Index of Oil and Gas Wells in Israel	1988–2019	-0.22 [-0.54, 0.16] n=30	0.08 [-0.29, 0.44] n=29	-0.12 [-0.47, 0.27] n=28
TNO / NLOG — Netherlands boreholes	1988–2025	-0.03 [-0.35, 0.29] n=38	0.36 [0.04, 0.61] n=37 ● interval excludes zero	-0.19 [-0.49, 0.15] n=36
NZ Petroleum & Minerals — Public petroleum wells	1988–2025	0.26 [-0.10, 0.56] n=31	0.21 [-0.17, 0.53] n=30	-0.08 [-0.43, 0.30] n=29
Norwegian Offshore Directorate — Wellbores	1988–2025	-0.03 [-0.35, 0.29] n=38	0.16 [-0.18, 0.46] n=37	-0.06 [-0.38, 0.27] n=36
NSTA — UK offshore wellbore top holes	1988–2025	0.15 [-0.18, 0.45] n=38	0.45 [0.14, 0.67] n=37 ● interval excludes zero	0.03 [-0.30, 0.36] n=36
NSTA — England onshore wellbore top holes	1988–2025	0.22 [-0.12, 0.52] n=35	0.23 [-0.12, 0.53] n=34	-0.09 [-0.42, 0.26] n=33

Descriptive statistic; it does not establish causation or forecast skill. At least 15 year pairs are required.

Correlation of levels (includes long-term trends)

Levels also carry long-term trends such as basin maturity; annual changes better isolate year-to-year co-movement.

Catalogue	Years	0-year lag	1-year lag	2-year lag
Index of Oil and Gas Wells in Israel	1988–2019	0.11 [-0.25, 0.44] n=32	0.05 [-0.31, 0.39] n=32	-0.06 [-0.40, 0.30] n=31
TNO / NLOG — Netherlands boreholes	1988–2025	-0.48 [-0.69, -0.19] n=38 ● interval excludes zero	-0.44 [-0.67, -0.14] n=38 ● interval excludes zero	-0.43 [-0.67, -0.13] n=37 ● interval excludes zero
NZ Petroleum & Minerals — Public petroleum wells	1988–2025	0.25 [-0.08, 0.53] n=38	0.15 [-0.18, 0.45] n=38	0.04 [-0.29, 0.36] n=37
Norwegian Offshore Directorate — Wellbores	1988–2025	0.54 [0.27, 0.73] n=38 ● interval excludes zero	0.62 [0.38, 0.79] n=38 ● interval excludes zero	0.59 [0.32, 0.76] n=37 ● interval excludes zero
NSTA — UK offshore wellbore top holes	1988–2025	-0.68 [-0.82, -0.46] n=38 ● interval excludes zero	-0.69 [-0.83, -0.48] n=38 ● interval excludes zero	-0.73 [-0.85, -0.53] n=37 ● interval excludes zero
NSTA — England onshore wellbore top holes	1988–2025	-0.45 [-0.67, -0.15] n=38 ● interval excludes zero	-0.49 [-0.70, -0.20] n=38 ● interval excludes zero	-0.53 [-0.73, -0.25] n=37 ● interval excludes zero

JSON ↗CSV ↓

Sources, rights and method

U.S. EIA · Europe Brent Spot Price FOB, annual ↗

Source accessed: 2026-10-04

Reuse terms: EIA public information; the underlying daily prices come from a third party

Commercial permission unconfirmed

EIA computes annual values as unweighted averages of daily closing spot prices supplied by Refinitiv, an LSEG business. EIA information is public, but its reuse policy excludes content licensed from third parties; redistribution rights for the underlying daily prices are not established here, so only the published annual averages are shown.

Source: U.S. Energy Information Administration (Sep 2026). Underlying daily prices: Refinitiv, an LSEG business.

0f13cb979e17d29b4fa038891a57ff2babcbc1caa2c44ff39622020f426553d5

Terms ↗Source ↗

IHFC · Global Heat Flow Database, Release 2024 (v. 2026.03) ↗

Source accessed: 2026-10-04

Reuse terms: CC BY 4.0

Global Heat Flow Data Assessment Group et al. (2024): The Global Heat Flow Database: Release 2024. V. 2026.03. GFZ Data Services. https://doi.org/10.5880/fidgeo.2024.014 Licensed under CC BY 4.0. Wellficent shows parent-level site values and selected metadata; values are not modified.

3442369abbbe3d904fc99e7acaf6cf002b94d10ee1257ee95d21b630919386d9

Terms ↗Source ↗

Derived values

Spud-year counts use each registry record with a source spud date; records without one are excluded and counted separately. The year containing a catalogue snapshot date is partial; later years are not covered.
Measured-depth quantiles are per catalogue and spud year, linear interpolation (type 7), on the first reported measured depth in metres with its source reference level unchanged.
Production lifecycle values use SODIR net oil equivalents in million Sm3. Rolling 12-month sums require 12 consecutive unflagged months; cumulative sums exclude flagged months. Periods incomplete at source access are excluded.
Produced water share = produced water / (produced water + gross oil) over the latest valid 12-month window, standard volumes; shown only when gross oil is positive.
Bottom-hole temperatures are SODIR-reported values at true vertical depth below RKB; correction method is not stated. Log temperatures can underestimate formation temperature.
Heat-flow values are IHFC parent-level site values in mW/m2 with verbatim quality scores. Distance to a heat-flow site is context, not a measurement at a well.
Brent values are EIA annual averages in nominal USD per barrel. Correlations with drilling counts are descriptive and do not establish causation or forecast skill.

Analysis edition: f702bc104e8a256dab42acd3abc2ec571688c35dbf8406cc7f387377f9bb9004

Data API ↗

Drilling cycles and oil price

Price and drilling co-movement

Sources, rights and method

U.S. EIA · Europe Brent Spot Price FOB, annual ↗

IHFC · Global Heat Flow Database, Release 2024 (v. 2026.03) ↗

Beyond the wellhead, context.