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Home My WebLink AboutGMC Data Report No. 028 GEOCHEMICAL REPORT TOC/Rock-Eval Pyrolysis Results Mobil N. Kuparuk St. 26-12-12 8,820-8,850 ft BROWN & RUTH LABORATORIES, INC. 1790 West Belt North Houston, Texas 77049 713/464-3284 CLIENT I.D.: REPORT FILE NO. 1578 Kuparuk St. 26-12-12 LOCATION: Alaska WELL INTERVAL EVALUATED: 8,670-8,924 ft SAMPLE MATERIAL A total of eight samples representing the well interval 8,670-8,924 ft were received. The sample material was generally in good condition with no visual evidence of contamination. ANALYTICAL PROGRAM Prior to analysis, a split of each sample was taken and examined under a binocular microscope. The examination included a brief lithologic description and the removal of any contaminants. The sample material was then ground to a fine powder and submitted for total organic carbon (TOC) analysis and pyrolysis. ' RESULTS AND INTERPRETATION The eight samples analyzed consist of dark-colored sandstone and shale. TOC contents are average to high. The Rock-Eval pyrolysis data indicate good source potential to generate oil. The high pyrolysis S1 yields of the sandstone samples suggests the presence of non-indigenous free hydrocarbons. The Truax values of the sandstone samples are probably depressed due to the high Sl yields. Based on the Tmax data of the st,ale samples, the sediments are immature to marginally mature. REPORT FILE NO. 1656 WELL: Mobil N. Kuparuk St. 26-12-12 LOCATION: Alaska WELL INTERVAL EVALUATED: 8,820-8,850 ft SAMPLE MATERIAL One cuttings sample from the interval 8,820-8,850 ft of the Mobi! N. Kuparuk St. 26-12-12 well was received. The sample material was in good condition with no visual evidence of contamination. ANALYTICAL PROGRAM Prior to analysis, a split of the sample was taken and briefly examined under a binocular microscope for contaminants. The sample material was then ground to a fine powder and submitted for total organic carbon (TOC) analysis and Rock-Eval pyrolysis. RESULTS AND INTERPRETATION The sample analyzed has high amounts of organic matter. The Rock-Eval pyrolysis data indicate that the sample has good potential to generate light oil-condensate. However, the Tmax data suggest that the sediments are only marginally mature. TABLE I Kuparuk St. 26-12-12 Alaska File No. 1578 March 4, 1985 Lithologic Descriptions and Organic Carbon (TOC) Results Sample Number Depth (ft.) Lithologic Description TOC (wt %) 1578-001 1578-002 1578-003 1578-004 1578-005 1578-006 1578-007c 1578-008c 8670-8700 A)100% shale, olive black 8700-8730 A)100% shale, dark gray trace pyrite 8760-8790 A)100% sandstone, argillaceous, medium dark gray 8790-8820 A)100% sandstone, argillaceous, medium dark gray 8850-8880 A) 85% shale, 'olive black B) 15% mudstone, calcareous, olive gray 8880-8910 A) 70% shale, olive black B) 30% siltstone, dark yellowish brown 8921-8922 A)100% sandstone, dark yellowish brown 8923-8924 A) 100% sandstone, dark yellowish brown 2.13 1.95 0.40 0.63 1.77 1.90/1.97 1.01 1.17 c - denotes core sample. Kuparuk St. 26-12-12 Alaska TABLE II Results of Organic Carbon Analysis and Rock-Eval Pyrolysis File No. 1578 March 4, 1985 Sample Depth Number (ft.) T.O.C. (% wt.) SI S2 S3 Tmax Production S2 (mg/g) (mg/g) (mg/g) (°C) Index S~ Hydrogen Index Oxygen Index 1578-001 8670-8700 1578-002 8700-8730 1578-003 8760-8790 1578-004 8790-8820 1578-005 8850-8880 1578-006 8880-8910 1578-007c 8921-8922 1578-008c 8923-8924 2.13 1.95 0.40 0.63 1.77 1.90 1.01 1.17 0.38 5.43 0.74 435 0.06 7.32 0.36 5.88 0.45 434 0.06 12.98 0.20 1.31 0.16 426 0.13 8.19 1.13 3.19 0.11 428 0.26 29.00 0.33 5.56 0.52 428 0.06 10.69 0.45 5.46 0.87 435 0.08 6.28 5.59 4.32 0.23 418 0.56 18.78 7.34 4.34 0.20 418 0.63 21.70 255 302 328 506 314 287 428 371 35 23 40 17 29 46 23 17 c - denotea core sample. TABLE I Mobil N. Kuparuk St. 26-12-12 Alaska Results of Organic Carbon Analysis and Rock-Eval Pyrolysis File No. 1656 April 12, 1985 Sample Depth T.O.C. Number (ft.) (% Wt. ) S1 S2 S3 Tmax Production (mg/g) (mg/g) (mg/g) (°C) Index S2 Hydrogen Oxygen ~ Index Index 1656-001 8820-8850 2.00 0.67 5.77 0.65 437 0.10 0.85 289 33