Duties and Reports of the Subsurface Geologist 841 



bottom-hole choke used also include) , gas-oil ratio, pressures, and 

 gravity and cuts are recorded, in the order given, at foot of log 

 under title "TESTS." Bottom-hole pressures and differential data 

 should be included, if available, as well as the method of induc- 

 ing production. Wlien selected intervals are tested, only the up- 

 permost and lowermost depths are listed, followed by "Sel. 

 Perfd." 



b. The initial production of the well is recorded at the foot of the 

 log under the original date when the LP. was established. Immedi- 

 ately below the date LP. was established is recorded in paren- 

 thesis the type of completion. On the next line is listed the pro- 

 ducing sand or sands, depths of producing interval, and, in 

 parentheses, "GUN PERFD.," if blank casing has been perforated, 

 or by "C.O.S.," if a combination oil string of blank and preper- 

 forated pipe was used. If selective intervals are open to produc- 

 tion, only the uppermost and lowermost depths are listed after the 

 producing sand or sands. A note "SEL. PERFD." or "C.O.S. 

 SEL. PERFD." in parenthesis refers the observer to the log for 

 actual depth of the selected intervals. The initial production al- 

 ways commences on a new line, although the sequence of report- 

 ing the production is "BOPD," "CHK," "GOR," "THP," "CHP," 

 "GRAV," "CUT." The cut is broken down to show the compo- 

 nents of which it is made. If bottom-hole pressure and pressure 

 differentials are available, they are entered after the cut. 



c. Original date when LP. was established and initial production at 

 foot of log should agree with the dates and figures listed in the 

 completion report on this well. 



d. Data at the foot of the log, if short, is drafted on the negative. If 

 considerable data are included at the foot of the log, it is type- 

 written on transparent paper with a good typewriter ribbon. A 

 piece of carbon paper is placed behind the transparent paper in 

 such a manner that the letters are typed on both sides of the 

 paper. An Ozalid opaque typewriter ribbon may be used. Ozalid 

 copies are then attached to the log. 



.11 Miscellaneous 



a. Normal curves recorded by the second galvanometer are shaded 

 in accordance with the draftsman's guide by means of oblique 

 lines 3 mm. apart, running from upper right to lower left through 

 the altered curve. 



b. API gravities determined from oil-saturated cores or ditch 

 samples are drafted freehand at the end of the bar graph to rep- 

 resent gravity on the resistivity side of the log at the depths 

 where the saturation was encountered. Refractometer gravities are 

 used when available. When suspension bead or hydrometer meth- 

 ods are employed, it is so noted in parenthesis after the gravity. 



