MOBIL EXPLORATION NORWAY INC. WELL 35/11-4 DST RESULTS

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1 MOBIL EXPLORATION NORWAY INC. WELL 35/11-4 DST RESULTS DST No: 1 RESULTS RESERVOIR TYPE: OIL RESERVOIR PRESSURE : 3933 PSIA AT MID PERFORATIONS INTERVAL : mrkb (YATZY) FLOW PERIOD CHOKE SIZE OIL RATE GAS RATE GOR (In) (STB/D) (MMSCF/D) (SCF/BBL) BS&W (%) FLOWING BHP (PSIA) CLEANUP MAIN 32/64 32/ DST No: 2B RESULTS RESERVOIR TYPE: OIL RESERVOIR PRESSURE : 3353 PSIA AT MID PERFORATIONS INTERVAL : mrkb (YATZY) FLOW PERIOD CHOKE SIZE OIL RATE GAS RATE GOR (in) (STB/D) (MMSCF/D) (SCF/BBL) BS&W (%) FLOWING BHP (PSIA) CLEANUP MAIN 40/64 40/ DST No: 3 RESULTS RESERVOIR TYPE: OIL RESERVOIR PRESSURE : 2984 PSIA AT MID PERFORATIONS INTERVAL : mrkb (YATZY) FLOW PERIOD CHOKE SIZE OIL RATE GAS RATE GOR (In) (STB/D) (MMSCF/D) (SCF/BBL) BS&W (%) FLOWING BHP (PSIA) CLEANUP MAIN 44/64 48/ DST No: 4B RESULTS RESERVOIR TYPE: OIL RESERVOIR PRESSURE : 2929 PSIA AT MID PERFORATIONS INTERVAL: mrkb (YATZY) FLOW PERIOD CHOKE SIZE OIL RATE GAS RATE GOR (In) (STB/D) (MMSCF/D) (SCF/BBL) BS&W (%) FLOWING BHP (PSIA) CLEANUP MAIN 32/64 16/ NOTE:F : LOWING BHPS QUOTED AT DEPTH OF GAUGE CARRIER (HAUJBURTON) Table 2.1 DST Results, Production Rates

2 MOBIL EXPLORATION NORWAY INC. WELL 35/11-4 DST RESULTS DST No: 1 RESULTS RESERVOIR TYPE: OIL RESERVOIR PRESSURE : 3933 PSIA AT MID PERFORATIONS INTERVAL: rnrkb (YATZY) FLOW PERIOD CLEANUP MAIN DURATION (MINUTES) OIL DENSITY (G/CC) GAS SPEC. GRAVITY WHP (PSIA) WHT rn FLOWING BHP (PSIA) DST No: 2B RESULTS RESERVOIR TYPE: OIL RESERVOIR PRESSURE : 3353 PSIA AT MID PERFORATIONS INTERVAL: mrkb (YATZY) FLOW PERIOD DURATION (MINUTES) OIL DENSITY (G/CC) GAS SPEC. GRAVITY WHP (PSIA) WHT < F> FLOWING BHP (PSIA) CLEANUP MAIN DST No: 3 RESULTS RESERVOIR TYPE : OIL RESERVOIR PRESSURE : 2984 PSIA AT MID PERFORATIONS INTERVAL: mrkb (YATZY) FLOW PERIOD DURATION (MINUTES) OIL DENSITY (G/CC) GAS SPEC. GRAVITY WHP (PSIA) WHT < F) FLOWING BHP (PSIA) CLEANUP MAIN DST No: 4B RESULTS RESERVOIR TYPE: OIL RESERVOIR PRESSURE : 2929 PSIA AT MID PERFORATIONS INTERVAL: mrkb (YATZY) FLOW PERIOD DURATION (MINUTES) OIL DENSITY (G/CC) GAS SPEC. GRAVITY WHP (PSIA) WHT ( F) FLOWING BHP (PSIA) CLEANUP MAIN NOTE : FLOWING BHPS QUOTED AT MID-PERFORATION DEPTH Table 2.2 DST Results, Fluid Properties

3 PST No. 1 35/11-4 ( mrkb YATZY1 Bottle No.: TS (oil) A (gas) Analyzed by: GECO-PRAKLA Reservoir pressure Reservoir temperature Density sep. liq. (15 C) Separator gas gravity GOR during DST GOR used for recombination Separator pressure Separator temperature Bubble point 3933 psia F kg/m (air=l) 960 SCF/STB 862 SCF/BBL sep. oil psia 95 F psia WELLSTREAM COMPOSITION mol % Nitrogen Carbon dioxide Methane Ethane Propane iso-butane n-butane iso-pentane n-pentane Hexanes Heptanes Octanes Nonanes Decanes plus Total Table 2.25 DST 1, Results of PVT and Composition Analysis

4 PST No. 2B 35/11-4 ( mrkb YATZY) Bottle No.: TS (oil) A (gas) Analyzed by: GECO-PRAKLA Reservoir pressure Reservoir temperature Density sep. liq. (15 C) Separator gas gravity GOR during DST GOR used for recombination Separator pressure Separator temperature Bubble point 3353 psia F kg/m (air=l) 581 SCF/STB 543 SCF/BBL sep. oil psia 86 F psia WELLSTREAM COMPOSITION mol % Nitrogen Carbon dioxide Methane Ethane Propane iso-butane n-butane iso-pentane n-pentane Hexanes Heptanes Octanes Nonanes Decanes plus Total Table 2.26 PST 2B Results of PVT and Composition Analysis

5 PST No. 3 35/11-4 ( mrkb YATZY) Bottle No.: TS (oil) A (gas) Analyzed by: GECO-PRAKLA Reservoir pressure Reservoir temperature Density sep. liq. (15 C) Separator gas gravity GOR during DST GOR used for recombination Separator pressure Separator temperature Bubble point 2984 psia F kg/m (air=l) 581 SCF/STB 498 SCF/BBL sep. oil psia F psia WELLSTREAM COMPOSITION mol% Nitrogen Carbon dioxide Methane Ethane Propane iso-butane n-butane iso-pentane n-pentane Hexanes Heptanes Octanes Nonanes Decanes plus Total Table 2.27 DST 3 Results of PVT and Composition Analysis

6 PST No. 4B 35/11-4 ( mrkb YATZY) Bottle No.: TS (oil) A (gas) Analyzed by: GECO-PRAKLA Reservoir pressure Reservoir temperature Density sep. liq. (15 C) Separator gas gravity GOR during DST GOR used for recombination Separator pressure Separator temperature Bubble point 2929 psia F kg/m (air=l) SCF/STB (*) 475.1SCF/BBLsep.oil 522 psia 98.6 F psia WELLSTREAM COMPOSITION mol % Nitrogen Carbon dioxide Methane Ethane Propane iso-butane n-butane iso-pentane n-pentane Hexanes Heptanes Octanes Nonanes Decanes plus Total (*) measurement after the flow was directed through the test separator. No measurement was done before free gas from the gas cap started to flow. Table 2.28 PST 4B Results of PVT and Composition Analysis

7 U- 6 ' GEOIABUNOR Geochemical Report for Oils from Well NOCS 35/11-4 Author: Kjell Arne Bakken Geolab Nor A/S Hornebergveien Trondheim Norway Date

8 GEOLABUNOR Chapter 1 INTRODUCTION Four oils from well NOCS 35/11-4 were analyzed on behalf of Mobil Exploration Norway by authorization of Jim Gormly, the samples being supplied by Mobil.The well is located in the Norwegian sector of the North Sea and is situated north-west of the Troll gas field. The report is divided into chapters according to the various analytical methods used. Within the chapters the results are mainly discussed in a (descending) stratigraphic context. The four oil samples are DST-1 ( m, Brent Group), DST-2 ( m, Fensfjord Formation), DST-3 ( m, Lower Sognefjord Formation) and DST-4b ( m, Upper Sognefjord Formation). In the tables the samples are simply referred to by their DST number (1, 2, 3 and 4). 1.1 General Comments The well NOCS 35/11-4 was previously analysed by Geolab Nor and a report "Geochemical Report for Well NOCS 35/11-4" was issued (authors Bakken et al). References are made to this report. The reader is also referred to this report for the location map and stratigraphicai data. This report also contains the data with which that of the four analysed oils in this report are compared. No data is duplicated in this report.

9 GEOLABUNOR 1.2 Analytical Program In accordance with Jim Gormly the following analytical program was executed for the four oils from well NOCS 35/11-4: Analysis tvoe No of samples Fiqures Tables MPLC separation 4 1b-c Whole oil GC 4 1a-b 1a Saturated hydrocarbon GC 4 2a-b 2 Aromatic hydrocarbon GC 4 3a-b 3 Isotope composition C 15 + fractions 4 4a-b 4a-b GC - MS of saturated and aromatic HC 4 5a-f 5a-i GC - MS cross-plots 6a-e

11 RnaLysis Name -. C526200] 9 W ,1,1 Mult ichrom 700 Figure 1b o 400 «300 0) _ 10 WELL 35/11-4 DBT.1 WHOLE OIL GC (FID) i i i ± Time (minutes) Reported on 4-FEB-1992 at 14:00 GEOLABUNOR

12 90 Analysis Name-.C526200] 11 SR35114DST2, /11-4 DST.2 Figure 2a. Mult ichrom «60 a> 50 CO c o c 5 c oj 30 J L J L J I 1 *+> WELL 35/11-4 SATURATED GC DST.2 Time (minutes) Reported on 3-FEB-1992 at 15= 47 GEOLABSBNOR

13 90 Analysis Name -. [526200] 11 SH35114DST1, /11-4 DST.1 Figure 2b. Mu It i chrom c i I I I WELL 35/11-4 DSr.l SATURATED GC Time (minutes) Reported on 3-FEB-1992 at 15:44 GEOIABSGNOR

14 700 Rna lys is Name : C RG B,k,1-35/11-4 DST.2 I CM Figure 3a. Mult ichrom «400 c <D = 10 i i i Time (minutes) WELL 35/11-4 DST.2 AROMATIC GC (FID) Reported on 4-FEB-1992 at 09:32 GEOLABMNOR

15 Rna tys is Name -, [ RG B,3. 1 Mult ichrom 700 _ WELL 35/11-4 DSr. 1 AROMATIC GC (FID) Time (minutes) Reported on 4-FEB-1992 at 09:24 GEOIABSBNOR

16 FiJ.e:NSdéATH& « Acq: lo-^eb :0(hb«E1+ Magnet SlR Sample#7 Text:WELL 35/11-4, DST2, SATURATED FRACTION FROM OIL S:7 looi, Exp:SATl i :20:00 ^O.OEO TIME GEOIABSBNOR

17 file :NSOsAf 14k «J.-4HU9 Acq: 10-1^ :00:b9 K1+ Magnet SIR Sample»6 Text:WELL 35/11-4, DST1, SATURATED FRACTION FROM OIL S:6 Exp:SAT1 30:00 40:00 50:00 1:00:00 1:20:00 0.0E0 TIME GEOIABIBNOR

18 Flle:NS0SAT14B # Acq:10-FEB :00:b8 EI+ Magnet SIR Sample#7 Text:WELL 35/11-4, DST2, SATURATED FRACTION FROM OIL S:7 looi 90 J 85J 80i 75J 70i 65J 60i 55i 50J 45i 40i 35J Exp:SATl Figure 5c..1.4E5.1.3E5.1.2E5.1.2E5.1.1E5.1.0E5.9.5E4.8.8E4.8.1E4.7.5E4.6.8E4.6.1E4.5.4E4-4.7E4 30i j 15 J loj 5J oi 50:00 1:00:00 ' ' l:lo:oo' ' ' 1:20:00.4.1E4.3.4E4.2.7E4.2.0E4.1.4E4.6.8E3.0.0E0 TIME GEOLABIGNOR

19 File:NS0SAT14B # Acq:10-FEB :00:b8 E1+ Magnet SIR Sample#6 Text:WELL 35/11-4, DST1, SATURATED FRACTION FROM OIL S:6 looi : 85J 80 J 75 j 70i 65i 60 j 55 j 50J 45J 40i 35i 30J 25J 20, 15J 10 J 5J Exp:SATl Jl Figure 5d..2.2E5.2.1E5 2.0E5.1.9E5.1.8E5.1.6E5.1.5E5.1.4E5.1.3E5.1.2E5 1.1E5.9.9E4.8.8E4.7.7E4 6.6E4.5.5E4.4.4E4 3.3E4 2.2E4 1.1E4 0J 30:00 40:00 50T00 :00:00 TTIoToo r 1:20: 00 lo.oeo TIME GEOLABSBNOR

20 File:NS0SAtl4& « Acq:10-fc'E& :00:b8 E1+ Magnet SIR Sample#7 Text:WELL 35/11-4, DST2, SATURATED FRACTION FROM OIL S:7 100! Exp:SATl.7.5E4 95. u i Figure 5e,.7.1E4.6.7E E4 80:.6.0E4 75J.5.6E4 70i.5.2E4 65i.4.9E4 60:.4.5E4 55J.4.1E4 50i.3.7E4 45i.3.4E4.3.0E4.2.6E4.2.2E4.1.9E4.1.5E4.1.1E4.7.5E3.3.7E3 3oToO :00 45TOO ToToO :00:00 1:05:00 l:l6:00 1:15:00.0E0 TIME GEOIABSSNOR

21 Sample It Acq: i(i-t'éb :00:bB El+ Magnet elk Text:WELL 35/11-4, DST1, SATURATED FRACTION FROM OIL S:6 ExptSATl 30: T T O O ' 1': 06:00 ' ' l':05:00 ' ' 1:10:00 1:15:00 L0.0E0 TIME GEOLABSGNOR

22 Appendix 1 Tables

23 Table 1 a: Quantification of Cl - C7 compounds. I C (0 x d) _c o I I o c -M "^ Q. O O 35/ / / /11-4 DST 1 DST 2 DST 3 DST 4B O ' , !l * I CM GEOLABIBNOR

24 Table 1 a: Quantification of Cl - C7 compounds. 35/ / / /11-4 DST DST DST DST B c 3 O tr c: ca 4-> 13 _O O to l'.ib C na.a I OJ c ro J-J C a) CL o v> as as n-pentane r < OJ 4-) -4-> tu C.r-4 CL -o o 1, 1 ro o - >-v > o., 1 >^ _c 4-> O) 1 OJ ca 4-> C <u CL, ( >-. _c: 4-> 03 m l QJ CZ X 0) I o t 1 o >-. o a> * c > * ro -TZ 4-i -»-» C E CL <u c OJ fst c QJ 6." c ra X <u JZ o o >^ a c m X (U. 1 >» 4-J a> Et OJ ra x QJ _C >-«-C 4J (UEI l." GEOLABSSNOR

25 Table 1 b: Weight of EOM and Chromatographic Fraction for well 35/11-4 OILS Page: 1 Depth unit of measure: m Depth Typ Lithology Rock Extracted (g) EOM (mg) Sat (mg) Aro (mg) Asph (mg) NSO (mg) HC (mg) Non-HC TOC(e) (mg) (%) Sample 1.00 oil B 2.00 oil OB 3.00 oil OB 4.00 oil _ OB GEOLABBNOR

26 Table 1 c: Composition of material extracted from the rock (%) for well 35/11-4 OILS Page: 1 Depth unit of measure: m Sat Aro Asph NSO HC Non-HC Sat HC Depth Typ Lithology EOM EOM EOM EOM EOM EOM Aro Non-HC Sample 1.00 oil B 2.00 oil OB 3.00 oil OB 4.00 oil OB GEOIABSBNOR

27 Table 2 : Saturated Hydrocarbon Ratios for well 35/11-4 OILS Page: 1 Depth unit of measure: m Pristane Pristane Pristane + Phytane Phytane Depth Typ Lithology ncl7 Phytane ncl7 + nc18 ncl8 CPI Sample 1.00 oil B 2.00 oil OB 3.00 oil OB 4.00 oil OB GEOLABIBNOR

28 Table 3 : Aromatic Hydrocarbon Ratios for well 35/11-4 OILS Page: 1 Depth unit of measure: m Depth Typ Lithology MNR DMNR BPhR 2/lMP MPIl MPI2 Re (3+2) DBT/P 4/lMDBT /lmdbt Sample 1.00 oil OB 2.00 oil OB 3.00 oil OB 4.00 oil OB GEOLABSSNOR

29 Table 4a : Tabulation of carbon isotope data for EOM/EOM - fractions or Oils for well 35/11-4 OILS Page: 1 Depth unit of measure: m Depth Typ Lithology EOM/Oil Saturated Aromatic NSO Asphaltenes Kerugen Sample 1.00 oil oil oil oil GEOLABIBNOR

30 Table 4b : Tabulation of cv values from carbon isotope data for well 35/11-4 OILS Depth unit of measure: m Depth Typ Lithology Saturated Aromatic cv value Page: 1 Sample 1.00 oil oil oil oil GEOLABSBNOR

31 Table 5A: Variation in Triterpane Distribution (peak height) SIR for Well 35/11-4 OILS Page: 1 Depth unit of measure: m B C+D Jl Depth Lithology B/A B/B+A B+E+F C/E C/C+E X/E Z/E Z/C Z/Z+E Q/E E/E+F C+D+E+F D+F/C+E Jl+J2% Sample GEOIABSBNOR

32 Table 5B: Variation in Sterane Distribution (peak height) SIR for Well 35/11-4 OILS Depth unit of measure: m Depth Lithology Ratiol Ratio2 Ratio3 Ratio4 Ratio5 Ratio6 Ratio7 Ratio8 Ratio9 RatiolC Sample Page: Ratiol: a / a + j Ratio2: q / q + t * 100% Ratio3: 2(r + s)/(q + t + 2(r + s)) * 100% Ratio4: a + b + c + d/h + k n Ratio5: r + s / r + s + q Ratio6: u + v / u + v + q + r + s + t Ratio7: u + v / u + v + i + m + n + q + r + s + t Ratio8: r + s / q + r + s + t Ratio9: q / t RatiolO: r + s / t GEOIABSGNOR

33 Table 5C: Variation in Triaromatic Sterane Distribution for Well 35/11-4 OILS Page: 1 Depth unit of measure: m Depth Lithology Ratiol Ratio2 Ratio3 Ratio4 Ratio5 Sample Ratiol: al al gl Ratio4: al / al + el + fl + gl Ratio2: bl bl gl g Ratio5: al / al + dl Ratio3: al + bl / al + bl + cl + dl + el + fl + gl GEOLABSBNOR

34 Table 5D: Variation in Monoaromatic Sterane Distribution for Well 35/11-4 OILS Page: 1 Depth unit of measure: m Depth Lithology Ratiol Ratio2 Ratio3 Ratio4 Sample Ratiol: Al / Al + El Ratio2: Bl / Bl + El Ratio3: Al / Al + El + Gl Ratio4: Al+Bl / Al+Bl+Cl+Dl+El+Fl+Gl+Hl+Il GEOLABMNOR

35 Table 5E: Aromatisation of Steranes for Well 35/11-4 OILS Depth unit of measure: m Depth Lithology Ratiol Ratio2 Sample Page: Ratiol: Cl+Dl+El+Fl+Gl+Hl+Il Cl+Dl+El+Fl+Gl+Hl+Il + cl+dl+el+fl+gl Ratio2: gl / gl + 11 GEOLABIBNOR

36 Table 5F: Raw GCMS triterpane data (peak height) SIR for Well 35/11-4 OILS Page: 1 Depth unit of measure: m Depth Lithology p q r s t a b z c Sample d e f g h i jl j2 kl k ml m GEOLABIGNOR

37 Table 5G: Raw GCMS sterane data (peak height) SIR for Well 35/11-4 OILS Page: 1 Depth unit of measure: ra Depth Lithology u v a b c d e f g Sample m n q GEOLABIGNOR

38 Table 5H: Raw GCMS trioaromatic sterane data (peak height) for Well 35/11-4 OILS Depth unit of measure: m Depth Lithology al bl el dl el fl Page: 1 Sample GEOLABSGNOR

39 Table 51: Raw GCMS monoarotnatic sterane data (peak height) for Well 35/11-4 OILS Depth unit of measure: m Depth Lithology al bl el dl el fl gl hi il Page: 1 Sample GEOLABUNOR

DRILLING FLUIDS SERVICEf. MudC/ Schlumberger Dowell. Administration Data. Well Name Operator Operator Rep. Analysis Type

DRILLING FLUIDS SERVICEf. MudC/ Schlumberger Dowell. Administration Data. Well Name Operator Operator Rep. Analysis Type Schlumberger Dowell DRILLING FLUIDS SERVICEf MudC/ Well Name Operator Operator Rep. Analysis Type 6204/1 Administration Data Dowell Well Name Operator Operator Rep. Analysis Type 6204/1 0-2 A STATOIL Kai