352 
CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1905, 
Analysis  of  oil  from  Union  Pacific  well,  Spring  Valley,  Wyo, 
[By  Wilbur  C.  Knight,  professor  of  geology,  University  of  Wyoming,  1902.] 
No. 
Temperature  given  off. 
Specific 
gravity. 
Remarks. 
1 
77°-130°  C     
0.  7230 
.7540 
.7800 
.8040 
.8190 
.8340 
.8470 
.8580 
.  8040 
.  8880 
Oil  at  15°  C. 
2 
130°  170°  C                                     
Do. 
3 
170°-200°  C                 
Do. 
4 
200°-259°  C 
Do. 
5 
259°  292°  v'                                 
Do. 
292°-320°  C 
Do. 
320°-350°  C 
oil  at  18°  C. 
8 
350°-370°  C  
oil  at  22°  C. 
9 
370°  380°  C                                     
Do. 
10 
380°  400°  C                           
Do. 
Specific  gravity  of  crude  oil,  0.81, 
Oil  flashes  at  a  point  below  70°  i\ 
The  above  numbers  represent  tenths  of  the  product,  with  the  exception  of  the  last,  which  was  only 
half  filled  This  means  that  with  the  ordinary  method  of  distilling  oils  95  per  cent  of  the  crude  would 
be  saved. 
This  oil  will  yield  approximately,  the  following  products:  Gasoline  and  lighter  oils,  20  to  30  pel 
cent ;  kerosene,  30  to  40  per  cent :  paraffin,  10  to  20  per  cent.  The  remainder  of  the  oil  could  be  utilized 
to  some  extent  for  lubricating  purposes. 
This  is  a  superior  quality  of  crude  for  the  production  of  gasoline  and  kerosene,  but  of  little  impor- 
tance fur  lubricants  For  the  lighter  oils  it  is  wo  rt  h  a  lit  tie  more  than  the  ordinary  crude  from  Colorado 
or  Pennsylvania 
Analysis  of  oil  from  well  of  Pittsburg-Salt  Lake  Oil  Company  in  sec.  22,  T.  15  N.,  R.  118  W., 
1  mile  north  of  Spring  Valley,  Wyo. 
[By  C.  F.  Mabery,  Cleveland,  Ohio,  L906.] 
Percent. 
Gravity 
Baume. 
Nature  of  product. 
Given  off  at  — 
50°-lo0° 
21.3 
39.  7 
L6.  1 
i/..  I 
7.2 
o 
65 
^14 
36 
37 
Gasoline. 
150o-305o. 
Burning  oil. 
Gas  oil. 
305°-35()° 
350°-330° 
Cracked  oil  (partially 
cracked). 
Specific  gravity,  0.81,  or  44°  Baume. 
The  oil  begins  to  crack  at  350°;  of  course  this  product  is  really  gas  oil.  The  distillates  305°  350° 
350°-330°,  and  the  residue  contain  mui  h  paraffin.  These  oils  become  solid  when  cooled  in  tap  water 
with  paraffin,  so  the  yield  is  large. 
We  refined  some  of  the  burning  oil;  not,  however,  with  reference  to  flash  nor  complete  absence  of 
color.    It  refines  very  easily  and  gives  a  very  fine  grade  of  burning  oil. 
Of  course,  the  proportions  of  products  will  be  somewhat  different  on  a  refining  scale  i  1,000  barrels)  — 
probably  larger,  rather  than  smaller,  tlrnn  is  given  on  the  small  scale. 
This  petroleum  is  different  from  any  of  the  numerous  specimens  that  1  have  previously  examined 
from  the  Wyoming  territory. 
A  large  amount  of  very  light  gasoline  can  be  separated  by  st  rong  cooling. 
Writh  respect  to  the  large  proportion  of  gasoline  and  of  burning  oil,  also  of  paraffin,  this  petroleum 
is  one  of  the  most  valuable  that  I  have  ever  examined. 
It  is  a  nonsulphur  oil;  percentage  of  sulphur.  0.03. 
Very  little  lubricating  oil  can  be  obtained,  and  that  only  light,  28°  to  30°,  as  the  oil  begins  to  crack 
at  350°  or  less  and  will  not  stand  higher  distillation  for  the  manufacture  of  heavier  oils. 
The  paraffin  in  this  oil  is  6.2  per  cent  of  the  weight  of  the  crude  oil— more  than  is  usually  found  in 
American  petroleum. 
