804 



A. C. McCOY 



— " A ~~~~ — 







frxper/fnent 



nenf OS oV , 



**oJe 



was allowed to enter the box through openings at the lowest horizon of the 



sand. This water level was never as high as the top of the curve in the sand. 



e. Results. — The water entered 



the mud in both directions from 

 the sand layer and replaced about 

 an inch strip of the oil in the mud. 

 The oil moved into the coarser 

 grains of sand and within 24 hours 

 there was an oil pool in both 

 synclines on either side of a water- 

 filled anticline. Later, the oil 

 began to move out of the openings 



which admitted water from the outside, and collected upon the surface of 



the water. 



Experiment 3 



Statement. — A (3-in.) layer of oil mud was placed in a (round 14-in. diam- 

 eter) pan, which had a number of small holes in the bottom. A circular lens 

 of dry sand (3 in. in diameter and \ in. thick) was fitted down in the center at 

 the top of the mud. The surface 

 was leveled as carefully as possible 

 and covered with a \-\n. layer of 

 paraffin. This pan was then set 

 in a pan of wet sand, so that the 

 water level stood about 1 in. 

 below the top of the mud in the 

 first pan. 



Results. — After two weeks the 

 paraffin had arched up over the 

 dry sand, with a maximum rise of 

 I -in. The paraffin was punctured 



at this point, and within 24 hours the oil began to seep out and slowly run 

 down the side of the dome. Several days later, seeps began to come out at 

 various places, where the oil had dissolved its way through the paraffin. The 

 oil also passed down out of the holes in the bottom of the pan through the 

 sand, and collected upon the surface of the free water over the sand. Upon 

 examination, the water had replaced about i| in. of the oil in the bottom of 

 the pan. 



SSBS^ 





A t-Gns 0/ dry san</ 



a Oi/ ■sAa/'P 



C Wef <3asr</ - iva fer har/ia 

 access fib ^sfto/c thrtj 

 Smo// **o/eS '1 pan 6 



£>-0 Une of r&o/acernGnf- 



£ ffrcto in paraffin 



Gxaerrrr/en-t 3 



In the foregoing experiments, the mud was made from a mixture 

 of dried clays, the particles of which measured from 0.005 to 

 0.001 mm., and Oklahoma crude oil (38 Baume). Enough oil was 

 used to make the mud pack well. 



