Table 4.7  Crude Oil and Natural Gas Development Wells, 1949-2010




Year
Wells Drilled
Successful
Wells
Footage Drilled 1 Average Footage Drilled
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
12,061   10,435   4,593   27,089   83.0   51,275 [R] 51,288 [R] 21,672 [R] 124,235 [R] 4,251 [R] 4,915 [R] 4,718 [R] 4,586 [R]
1991
11,915   9,144   4,290   25,349   83.1   51,726 [R] 46,413 [R] 19,701 [R] 117,840 [R] 4,341 [R] 5,076 [R] 4,592 [R] 4,649 [R]
1992
8,831   7,650   3,478   19,959   82.6   41,789 [R] 41,183 [R] 16,393 [R] 99,365 [R] 4,732 [R] 5,383 [R] 4,713 [R] 4,978 [R]
1993
8,317   9,229   3,762   21,308   82.3   40,664 [R] 54,290 [R] 17,553 [R] 112,507 [R] 4,889 [R] 5,883 [R] 4,666 [R] 5,280 [R]
1994
6,753   8,593   2,849   18,195   84.3   34,649 [R] 53,219 [R] 14,465 [R] 102,333 [R] 5,131 [R] 6,193 [R] 5,077 [R] 5,624 [R]
1995
7,678   7,524   2,790   17,992   84.5   37,149 [R] 46,252 [R] 14,422 [R] 97,823 [R] 4,838 [R] 6,147 [R] 5,169 [R] 5,437 [R]
1996
8,347   8,451   2,934   19,732   85.1   38,822 [R] 52,140 [R] 15,714 [R] 106,676 [R] 4,651 [R] 6,170 [R] 5,356 [R] 5,406 [R]
1997
10,715   10,936   3,761   25,412   85.2   52,425 [R] 67,248 [R] 20,155 [R] 139,828 [R] 4,893 [R] 6,149 [R] 5,359 [R] 5,502 [R]
1998
7,355   11,073   3,171   21,599   85.3   35,839 [R] 66,031 [R] 17,704 [R] 119,574 [R] 4,873 [R] 5,963 [R] 5,583 [R] 5,536 [R]
1999
4,608   11,457   2,393   18,458   87.0   20,591 [R] 56,220 [R] 12,921 [R] 89,732 [R] 4,469   4,907 [R] 5,399 [R] 4,861 [R]
2000
7,802   16,394   2,805   27,001   89.6   34,642 [R] 78,820 [R] 14,929 [R] 128,391 [R] 4,440 [R] 4,808 [R] 5,322   4,755 [R]
2001
8,531   21,020   2,865   32,416   91.2   40,564 [R] 103,411 [R] 14,763 [R] 158,738 [R] 4,755 [R] 4,920 [R] 5,153 [R] 4,897 [R]
2002
6,517   16,498   2,472   25,487   90.3   29,150 [R] 87,340 [R] 12,545 [R] 129,035 [R] 4,473 [R] 5,294 [R] 5,075 [R] 5,063 [R]
2003
7,779   19,725   2,685   30,189   91.1   36,142 [R] 109,347 [R] 13,934 [R] 159,423 [R] 4,646 [R] 5,544 [R] 5,190 [R] 5,281 [R]
2004
8,406   22,515   2,732   33,653   91.9   39,011 [R] 128,461 [R] 14,383 [R] 181,855 [R] 4,641 [R] 5,706 [R] 5,265 [R] 5,404 [R]
2005
10,240   26,449   3,191   39,880   92.0   47,197 [R] 151,612 [R] 15,685 [R] 214,494 [R] 4,609 [R] 5,732 [R] 4,915 [R] 5,378 [R]
2006
12,758 [R] 30,382 [R] 3,659 [R] 46,799 [R] 92.2   58,630 [R] 177,659 [R] 18,033 [R] 254,322 [R] 4,596 [R] 5,848 [R] 4,928 [R] 5,434 [R]
2007
12,555 [R] 29,925 [R] 3,396 [R] 45,876 [R] 92.6 [R] 59,002 [R] 193,249 [R] 17,652 [R] 269,903 [R] 4,699 [R] 6,458 [R] 5,198 [R] 5,883 [R]
2008
15,753 [R] 29,929 [R] 3,713 [R] 49,395 [R] 92.5 [R] 75,558 [R] 208,948 [R] 18,072 [R] 302,578 [R] 4,796 [R] 6,981 [R] 4,867 [R] 6,126 [R]
2009
10,649 [R] 17,038 [R] 2,500 [R] 30,187 [R] 91.7   58,060 [R] 147,701 [R] 14,077 [R] 219,838 [R] 5,452 [R] 8,669 [R] 5,631 [R] 7,283 [R]
2010
15,586 [R] 15,929 [R] 3,184 [R] 34,699 [R] 90.8 [R] 94,583 [R] 137,747 [R] 15,527 [R] 247,857 [R] 6,068 [R] 8,648 [R] 4,877 [R] 7,143 [R]
1See "Footage Drilled" in Glossary. R=Revised.  
2See "Crude Oil Well" in Glossary. Notes:  ·  2011 data for this table were not available in time for publication.  ·  Data are estimates.
·  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 U.S. Energy Information
Administration (EIA) therefore statistically imputes the missing data.  ·  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 Pages:  ·  See http://www.eia.gov/totalenergy/data/monthly/#crude for updated monthly and annual
data.  ·  See http://www.eia.gov/petroleum/ 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.