Lesley.] OOZ [Dec. 15, 



Colorado Well No. 8. 

 Struck November, 1.S71. 



Level of well mouth above ocean 



Casing to rock 10 feet. 10 =^ 



? 208 to 278 = 



IstS.S 30 " 308 = 



? 103 " 410 — 



2dS. S 20 " 430 = 



? 85 " 515 = 



3d 8. S 46 " 561 = 



? pocket. 4 " 5G5 = 



Drilled dr^-. The casing was first put in at 180 feet. Failing to shut off 

 the fresh water, it was drawn and the large hole continued down to 278 

 feet. At this point it was cased again, but both fresh water and salt 

 water came in below as the drill went down, and the casing had to be 

 drawn the second time. The well was then reamed down to the second 

 sand, and 432 feet of casing put in, after which the hole remained perfectly 

 dr)^ until the oil sand was reached. 



The upper 20 feet of the 3d S. S. was good. The lower (2G feet) was 

 finer, of a grayish color and intermi.xed with white pebbles. When the 

 3d S. S. was struck, gas came in very freely and the hole quickly filled up 

 many feet with oil and salt water. 



Natural production 1^ barrels per day. 



Torpedoed November 21, 1871 with 2 quarts of nitroglycerine. Ex- 

 ploded 6 feet below top of 3d S. S. Result, 7 barrels per day. Declined 

 rapidly. 



Torpedoed December 15, 1871 with3 pintsof nitroglycerine. Exploded 

 at top of 3d. S. S. Result, not satisfactory. 



Torpedoed May 2, 1872 with 1 quart nitro-glycerine. Exploded 15 feet 

 below top of 3d S. S. Result, slight improvement. 



Abandoned November 7, 1872. 



Colorado Wdl, No. 9. 

 November, 1871. 



Level of well mouth above ocean* 1508 



Conductor to rock 18 feet. 18 = 1490 



? 395 to 413 = 1095 



IstS.S 28 " 441 = 1067 



? 119 " 560 = 948 



2d S. S 25 " 585 = 923 



? 77 " 662 = 846 



'3d S. S 48 " 710 -^ 798 



? pocket. 6 " 716 = 792 



Drilled dry. Cased at 417J feet. 



Sand generally good. 



Natural production about 3 barrels for a short time. 



♦ Oil City Depot provisionally OaV + P. R. R. datum. 



