848 Subsurface Geologic Methods 



2. Structure (general statement) 



(a) Regional: discussion of broad structural grain (fault and fold 

 pattern) . 



(b) Local: areal geologic map, structure map, cross sections; descrip- 

 tion of local structure and its relationship to the regional structural 

 fabric. 



VI. Discussion of logging data (electric, radioactive, thermal, drill-time, core-analysis, 

 etc.) 



VII. Accompanying enclosures 



1. Index map (local and regional). 



2. Geologic, structural, isopachous, and lithofacies maps. 



3. Local and regional cross sections. 



4. Well log (lithic and electric, showing cored intervals, casing points, tested 

 intervals, etc.) . 



5. Chronologic chart. 



6. Correlation chart. 



7. Photographs. 



VIII. Miscellaneous data (summary) 



1. Mud variations (salinity, viscosity, and temperature). 



2. Condition of hole (caving, deviation) . 



3. Bottom-hole pressures. 



4. Gas recording. 



5. Bit, core, and casing problems. 



6. Formation tests. 



7. Perforation program. 



IX. Detailed description of ditch and core samples 

 Interval (ft.) Description 

 2,110-25 Coarse, gray, unconsolidated sand. 

 2,125-35 Red, slightly mottled claystone. 



- — ■ — Top Cramer formation (Oligocene) 



2,135-90 Medium-grained, friable sandstone with 10 percent red claystone. 



2,190-2,210 (Core 1) (15 feet recovered). Dark-gray shale with thin streaks of fine- 

 grained, slightly oil-stained sandstone (medium acetone cut, strong 

 fluorescence) ; shows few high-angled fracture planes with faint stria- 

 tions at 60° to the axis of core; average dip about 16°; locally 12° and 

 22°; hole deviation 2° off vertical. 



Report on Well in Proved Field 



Stratigraphic and Paleontologic Analysis of Jones 36-1, 

 Independent Oil Company, Colorado 

 Well: Jones 36-1. 

 Company: Independent. 



Location: Center SWi/4SWi/4, sec. 32, T. 3 N., R. 46 W. 

 Date commenced: March 15, 1946. 

 Date final depth reached: September 18, 1946. 



Casing record: 16-inch cemented 1,200 ft.; 8%-inch cemented 6,634 ft. 

 Total depth: 6,960 ft. (bottomed in Morrison formation (Jurassic). 

 Status: Abandoned as dry hole. 



' Stratigraphic-Faunal-Mineralogic Summary 



Thickness 

 (feet) 



(a) Formations penetrated: 

 Upper Cretaceous: 



Pierre 0-5,790 



Niobrara 5,790-6,080 



Benton 6,080-6,660 



Dakota group 6,660-6,950 



Unconformity 



Jurassic: 



Morrison 6,950-6,960 



