842 Subsurface Geologic Methods 



A horizontal line, 1 mm. long for each degree of the oil's API 

 gravity, is drafted between the zero-resistivity line of the log and 

 the numerical representation of each gravity, a procedure which 

 creates a bar graph of oil gravities. 

 .12 Coloring 



a. When the completion log negative has been completed and 1 :500 

 prints have been made, those copies to be distributed within the 

 company are painted with water colors to indicate the district's in- 

 terpretation of the log. Both the SP and normal curve of sand 

 bodies untested but believed to be petroliferous, either by correla- 

 tion, core analysis, or electrical-log interpretation, are outlined in 

 red. Sand bodies, either producing oil or tested and found to be 

 capable of producing oil, are filled in solidly with red from the 

 center line of the log to the normal curve on the resistivity side 

 of the log and to the limits of the SP curve on the SP side. Sands 

 believed to be, or found to be, gas- or water-bearing are similarly 

 designated by the appropriate color, yellow or blue. Cores are 

 appropriately colored also. 



b. Tests are distinctively colored in accordance with the legend of 

 color symbols used in tests. 



c. Formation limits are designated by distinctive colors, in accord- 

 ance with the formation color chart used in the area. 



d. When circles, representing petroliferous ditch samples have been 

 employed, they are colored also. Similarly, when used, the blow- 

 out symbol is appropriately colored. 



.13 Trimming and Folding 



a. When final prints are prepared, they are trimmed to a width of 

 6| in., with | in. left at the bottom of the log below the last line 

 of printed material, and an equal distance, f in., above the top- 

 most margin of the log heading to permit perforating for filing. 

 When the log is wider, effort should be made to hold the width 

 to 8J in. to facilitate filing. 



b. Completion logs, prior to distribution, are folded in a manner 

 most practical for filing purposes. The first fold is made 13 in. 

 below the top of the trimmed print. The next fold is made im- 

 mediately below the well number on the heading approximately 

 IO5 in. above the first fold. All subsequent folds are made identi- 

 cal to the first at the bottom, or to the second fold immediately 

 below the well number. The last fold or folds are made wherever 

 practical to permit the bottom of the print to fall in coincidence 

 with the first fold so that the scale, well number, initial produc- 

 tion, etc., at the bott#m of the log are visible when filed. 



.14 Distribution 



a. The district geological department preparing the completion log 

 keeps one copy, complete with color, for filing in the respective 



