560 NEW YORK STATE MUSEUM 



sands, the Bichburg and Waugh and Porter, are 25 and 28 feet 

 thick respectively, separated by some 100 feet of shale and slate. 

 At the outset the yield was about 1 barrels a day. 



6. Clarksville and Niles. — These two pools are only about one- 

 half a mile apart and can almost be considered as one in spite of 

 the dry streak between. The former covers 15 lots in the towns 

 of Clarksville and Wirt, and the latter six in the northern part of 

 Wirt. Clarksville was first drilled in 1883, and has about 250 

 producing wells, while Niles dates one year earlier with about 

 140 wells. The wells are from 1,000 to 1,500 feet deep, and 

 yielded when first shot from 5 to 25 barrels a day, but are now 

 only doing about half a barrel. The oil sand is thicker in Clarks- 

 ville than in Niles, being 5 to 60 feet as compared to two to five 

 feet. The gas pressure is light except on the northern edge, 

 where it has been recorded as high as 400 pounds to the square 



inch. 



II. Cattaraugus County Field. 



The territory in this county is a continuation of the Bradford 

 field and comprises part of the towns of Carrollton, Allegany and 

 Olean. The first drilling was done at Limestone in 18 n 5, followed 

 soon after by exploration at Rock City, Four Mile and Knapp's 

 Creek. The field may best be considered by dividing it into two, 

 viz. : A. Bradford (proper) ; B. Allegany town. 



A. Bradford. — This portion of the field covers about thirty 

 square miles, its greatest length being twelve and one-half miles 

 and its average breadth being two and one-half miles. There are 

 now some 1,850 producing wells, yielding about six-tenths of a 

 barrel each daily. In depth they run from 1,600 to 1,800 feet with 

 18 to 60 feet of good oil sand, although it often happens that the 

 oil sand is badly broken up by shale and slate. 



B. Allegany Town. — This field is comparatively new, having 

 been opened about five years ago. It is situated in the townof Alle- 

 gan}^ along the Allegheny river, and is about five miles long by 

 one and one-half wide. There are now about 175 producing wells 

 yielding each about three barrels daily. The oil sand runs about 

 18 to 25 feet thick, while the wells are 1,000 to 1,200 feet deep. 

 At the start the output ran as high as 40 barrels per well. So 

 far no connection has been made with the Bradford, but there is 

 no reason why it will not be made some day should the price of 

 oil go up to allow drilling to pay. 



