Table 4.7  Crude Oil and Natural Gas Development Wells, 1949-2008
Year	Wells Drilled				Successful Wells	Footage Drilled 1				Average Depth
	Crude Oil 2	Natural Gas 3	Dry Holes 4	Total		Crude Oil 2	Natural Gas 3	Dry Holes 4	Total	Crude Oil 2	Natural Gas 3	Dry Holes 4	Total
	Number				Percent	Thousand Feet				Feet per Well
1949	19,946	2,939	5,369	28,254	81.0	73,478	10,028	17,315	100,821	3,684	3,412	3,225	3,568
1950	22,229	3,008	6,507	31,744	79.5	85,833	11,329	20,020	117,183	3,861	3,766	3,077	3,691
1951	21,416	2,984	7,487	31,887	76.5	86,981	11,451	24,370	122,802	4,061	3,837	3,255	3,851
1952	21,514	2,955	7,669	32,138	76.1	89,657	11,863	26,999	128,518	4,167	4,015	3,520	3,999
1953	23,342	3,269	7,816	34,427	77.3	92,704	14,296	26,582	133,581	3,972	4,373	3,401	3,880
1954	26,156	3,312	8,541	38,009	77.5	103,953	14,458	29,998	148,408	3,974	4,365	3,512	3,905
1955	28,196	3,392	8,620	40,208	78.6	110,374	14,718	31,883	156,976	3,915	4,339	3,699	3,904
1956	28,261	3,709	8,993	40,963	78.0	109,241	17,559	32,143	158,943	3,865	4,734	3,574	3,880
1957	25,419	3,610	8,252	37,281	77.9	100,249	17,869	29,747	147,864	3,944	4,950	3,605	3,966
1958	22,029	4,183	7,530	33,742	77.7	84,393	20,083	27,343	131,820	3,831	4,801	3,631	3,907
1959	22,341	4,019	8,012	34,372	76.7	86,066	20,575	30,800	137,441	3,852	5,120	3,844	3,999
1960	20,937	4,281	8,697	33,915	74.4	79,739	22,780	33,826	136,345	3,809	5,321	3,889	4,020
1961	20,280	4,673	8,309	33,262	75.0	79,726	24,042	31,423	135,191	3,931	5,145	3,782	4,064
1962	20,516	4,582	8,263	33,361	75.2	82,226	23,762	35,030	141,018	4,008	5,186	4,239	4,227
1963	18,821	3,906	8,076	30,803	73.8	75,400	20,303	33,460	129,164	4,006	5,198	4,143	4,193
1964	18,686	4,137	8,743	31,566	72.3	73,748	21,394	36,782	131,923	3,947	5,171	4,207	4,179
1965	17,119	3,967	8,221	29,307	71.9	67,956	21,174	36,548	125,678	3,970	5,337	4,446	4,288
1966	15,584	3,679	6,808	26,071	73.9	60,523	20,140	26,552	107,215	3,884	5,474	3,900	4,112
1967	14,343	3,127	5,886	23,356	74.8	52,956	17,602	22,960	93,518	3,692	5,629	3,901	4,004
1968	13,377	2,970	5,373	21,720	75.3	53,875	16,975	23,162	94,012	4,027	5,716	4,311	4,328
1969	13,284	3,467	5,735	22,486	74.5	55,019	19,177	25,446	99,642	4,142	5,531	4,437	4,431
1970	12,211	3,534	4,869	20,614	76.4	52,130	19,945	22,951	95,026	4,269	5,644	4,714	4,610
1971	11,194	3,501	4,357	19,052	77.1	45,323	19,850	20,186	85,358	4,049	5,670	4,633	4,480
1972	10,693	4,784	4,757	20,234	76.5	45,241	25,159	22,475	92,875	4,231	5,259	4,725	4,590
1973	9,525	5,866	4,368	19,759	77.9	40,408	31,007	21,190	92,605	4,242	5,286	4,851	4,687
1974	12,788	5,948	5,283	24,019	78.0	46,996	30,766	24,296	102,059	3,675	5,173	4,599	4,249
1975	15,966	6,879	6,517	29,362	77.8	61,013	36,032	28,772	125,817	3,821	5,238	4,415	4,285
1976	16,602	8,063	6,986	31,651	77.9	62,365	39,992	31,008	133,365	3,756	4,960	4,439	4,214
1977	17,581	10,574	7,702	35,857	78.5	68,581	53,431	35,905	157,917	3,901	5,053	4,662	4,404
1978	18,010	12,642	8,586	39,238	78.1	69,936	64,043	39,493	173,472	3,883	5,066	4,600	4,421
1979	19,530	13,347	8,662	41,539	79.1	74,747	67,825	39,130	181,702	3,827	5,082	4,517	4,374
1980	31,182	15,362	11,704	58,248	79.9	115,085	78,244	49,326	242,655	3,691	5,093	4,214	4,166
1981	41,236	17,728	15,553	74,517	79.1	156,652	91,274	65,720	313,646	3,799	5,149	4,226	4,209
1982	37,022	16,943	15,072	69,037	78.2	136,261	92,386	63,066	291,713	3,681	5,453	4,184	4,225
1983	35,336	13,079	14,149	62,564	77.4	126,412	67,844	56,233	250,489	3,577	5,187	3,974	4,004
1984	40,697	15,810	14,563	71,070	79.5	150,359	81,545	61,236	293,140	3,695	5,158	4,205	4,125
1985	33,581	13,124	12,257	58,962	79.2	127,874	68,149	52,784	248,807	3,808	5,193	4,306	4,220
1986	18,129	7,802	7,232	33,163	78.2	70,246	39,638	30,636	140,520	3,875	5,080	4,236	4,237
1987	15,284	7,340	6,115	28,739	78.7	60,706	37,520	26,842	125,068	3,972	5,112	4,390	4,352
1988	12,791	7,831	5,408	26,030	79.2	53,353	40,371	25,438	119,162	4,171	5,155	4,704	4,578
1989	9,623	8,816	4,302	22,741	81.1	39,607	44,417	20,152	104,176	4,116	5,038	4,684	4,581
1990	R 11,701	R 10,300	R 4,576	R 26,577	R 82.8	R 50,623	R 51,064	R 21,759	R 123,447	R 4,326	R 4,958	R 4,755	R 4,645
1991	R 11,479	R 8,890	R 4,272	R 24,641	R 82.7	R 50,899	R 45,623	R 19,774	R 116,296	R 4,434	R 5,132	R 4,629	R 4,720
1992	R 8,423	R 7,479	R 3,466	R 19,368	R 82.1	R 41,077	R 40,758	R 16,404	R 98,238	R 4,877	R 5,450	R 4,733	R 5,072
1993	R 8,079	R 9,150	R 3,747	R 20,976	R 82.1	R 40,285	R 54,183	R 17,625	R 112,093	R 4,986	R 5,922	R 4,704	R 5,344
1994	R 6,505	R 8,484	R 2,823	R 17,812	R 84.2	R 34,330	R 52,988	R 14,468	R 101,786	R 5,278	R 6,246	R 5,125	R 5,714
1995	R 7,349	R 7,418	R 2,781	R 17,548	R 84.2	R 36,734	R 46,111	R 14,473	R 97,317	R 4,998	R 6,216	R 5,204	R 5,546
1996	R 8,123	R 8,367	R 2,922	R 19,412	R 84.9	R 38,460	R 52,149	R 15,694	R 106,302	R 4,735	R 6,233	R 5,371	R 5,476
1997	R 10,555	R 10,879	R 3,744	R 25,178	R 85.1	R 52,188	R 67,384	R 20,236	R 139,808	R 4,944	R 6,194	R 5,405	R 5,553
1998	R 7,232	R 10,946	R 3,166	R 21,344	R 85.2	R 35,731	R 65,990	R 17,752	R 119,473	R 4,941	R 6,029	R 5,607	R 5,598
1999	R 4,542	R 11,337	R 2,362	R 18,241	R 87.1	R 20,473	R 56,133	R 12,946	R 89,551	R 4,507	R 4,951	R 5,481	R 4,909
2000	R 7,703	R 16,284	R 2,791	R 26,778	R 89.6	R 34,607	R 78,579	R 14,866	R 128,052	R 4,493	R 4,826	R 5,326	R 4,782
2001	R 8,456	R 20,926	R 2,831	R 32,213	91.2	R 40,514	R 103,204	R 14,684	R 158,402	R 4,791	R 4,932	R 5,187	R 4,917
2002	R 6,474	R 16,394	R 2,446	R 25,314	R 90.3	R 29,104	R 87,156	R 12,466	R 128,726	R 4,496	R 5,316	R 5,096	R 5,085
2003	R 7,695	R 19,630	R 2,637	R 29,962	R 91.2	R 36,042	R 109,263	R 13,777	R 159,082	R 4,684	R 5,566	R 5,224	R 5,309
2004	R 8,319	R 22,379	R 2,677	R 33,375	R 92.0	R 38,892	R 128,505	R 14,219	R 181,615	R 4,675	R 5,742	R 5,311	R 5,442
2005E	R 10,119	R 26,297	R 3,193	R 39,609	R 91.9	R 47,249	R 152,006	R 15,758	R 215,014	R 4,669	R 5,780	R 4,935	R 5,428
2006E	R 12,462	R 29,888	R 3,703	R 46,053	R 92.0	R 58,651	R 178,650	R 18,466	R 255,768	R 4,706	R 5,977	R 4,987	R 5,554
2007E	R 12,184	R 29,236	R 3,557	R 44,977	R 92.1	R 60,256	R 192,771	R 18,650	R 271,676	R 4,945	R 6,594	R 5,243	R 6,040
2008E	16,401	29,737	3,860	49,998	92.3	80,993	195,013	20,149	296,155	4,938	6,558	5,220	5,923
1See "Footage Drilled" in Glossary. R=Revised.  E=Estimate.   2See "Crude Oil Well" in Glossary. Notes:  ·  Data are for development wells only; see Table 4.5 for exploratory and development wells combined, and Table 4.6 for exploratory wells only.  ·  Service wells, stratigraphic tests, and core tests are excluded.  ·  For 1949-1959, data represent wells completed in a given year.  For 1960-1969, data are for well completion reports received by the American Petroleum Institute during the reporting year.  For 1970 forward, the data represent wells completed in a given year.  The as-received well completion data for recent years are incomplete due to delays in the reporting of wells drilled.  The Energy Information Administration (EIA) therefore statistically imputes the missing data.  ·  Revisions for 1990-2007 are due to updates through September 2008 in the source files, including the addition of data for new wells that are classified as horizontal or lateral, which were previously not included in this table.  ·  Totals may not equal sum of components due to independent rounding.  Average depth may not equal average of components due to independent rounding. 3See "Natural Gas Well" in Glossary. Web Page:  See http://www.eia.doe.gov/oil_gas/petroleum/info_glance/petroleum.html for related information. 4See "Dry Hole" in Glossary. Sources: ·  1949-1965—Gulf Publishing Company, World Oil, "Forecast-Review" issue. ·  1966-1969—American Petroleum Institute (API), Quarterly Review of Drilling Statistics for the United States, annual summaries and monthly reports.  ·  1970-1989—EIA computations based on well reports submitted to the API.  ·  1990 forward—EIA computations based on well reports submitted to IHS, Inc., Denver, CO.  For current data see the EIA, Monthly Energy Review, Table 5.2.