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Show THE CADDO OIL AND GAS FIELD Great Petroleum Field of the Gulf Coastal Plain Natural gas has been known near Shrovcport, I.a., for moro than 25 years, but oil was discovered here only in 1904, when tho first successful success-ful well was drilled In what Is now known as tho Caddo oil and gas field. This "eld Is chiefly In Caddo Parish, lu tire northwest corner of Louisiana, but extends westward "a 'short distance dis-tance Into Marlon and Harrison counties, coun-ties, Texas, In 1905 tho production ct tho field wns only 3,358 barrels which Is loss than tho reported Initial dally production pro-duction of somo of tho mora recent wells. From this tlmo tho output Increased In-creased until 1913, when tho max!-mum max!-mum yearly production ot 9,028,177 barrels was made. Including the production pro-duction of 1914, tho Cnddo field has yicldod over 38,000,000 bnrrols of oil nnd a largo but unknown amount of gas. Although this field may havo reached its maximum production, It wilt not bo exhausted for many yeais. Tho result of nn Investigation by Geologist Ocorgo C. Mntson, recent- if ly published by tho United States Geological Survey as Bulletin C19 shows that In this field oil and fias aro found In tlirco different formations forma-tions nnd that oil has been found sporadically In n fourth. All tho productive pro-ductive beds aro In tho Upper Cro-taccous Cro-taccous scries. Tho shnllow Nocat-och Nocat-och sand Is n widespread gas bearing Band and yields heavy oil In tho north eastern pnrt of the Held; tho Woodbine, Wood-bine, tho deepest productlvo snnd, furnlshoa tho high grado oil of tho Cnddo field and In many places contains con-tains Bulllclcnt gas to cause strong Hows when tho wells nro first drilled. Tho structuro of the field ns sho -by contour mnps In tho Survoy ic port, consists of a scries of antlcllniu nnd syncllnjcs oxtcndlng In a north-enstcrly north-enstcrly direction and crossed approx-Imately approx-Imately at right angles by a northwesterly north-westerly fold. Tho nxos of tho folds us outlined on tho two koy beds do not agreo in position, a condition which Is explained by Iho way in which tho beds wero folded. In this field tho rocks appear to lie saturated, saturat-ed, so that no extensive dry sands aro encountered, and tho distribution of tho oil nnd gas Is In accordance with tho geologic structuro. Oil Is present In somo of tho shallow syn-cllnes syn-cllnes as well as In tho anticlines. Tl9 anticlinal theory of oil and ss accumulation is well illustrated locally lo-cally In tho northeastern part of thi field, on what Is called tho Vivian anticline. A copy of nullctln C19 may bo obtained ob-tained freo on application to the Director Di-rector of tho Geological Survey, Washington, D. C. |