L&U DOK. SENTER WELL SUMMARY ANCHOR DRILLING FLUIDS O STATOIL L. NR. Denne rapport tilhorer. KODE \X/(,(l 31/3-JJ \b FOR NORSKE SHELL WELL NO.

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1 Denne rapport tlhorer O STATOL L&U DOK. SENTER L. NR. KODE \X/(,(l 3/3-JJ \b Returneres etter bruk WELL SUMMARY FOR A/S NORSKE SHELL WELL NO. 3/2- ANCHOR DRLLNG FLUDS

2 WELL SUMMARY FOR A/S NORSKE SHELL WELL NO. 3/2-

3 GENERAL SUMMARY OPERATOR A/S NORSKE SHELL WELL NO. 3/2- OPERATOR'S REPRESENTATVES CONTRACTOR FRANS VAN KAMPEN, CHRS WESTON, HANS FECKEN DOLPHN SERVCES RG BORGNY DOLPHN _ CONTRACTOR'S REPRESENTATVES JOHN BUTCHART, HARALD FRGSTAD _ ANCHOR ENGNEERS CHRS ATKNSON, CHRS MEYJES, JOHN SETCHEL, CHARLES BLANCHARD WATER DEPTH 336 m SEABED to RKB 36 m 36" HOLE DRLLED TO 47 m 3" CASNG SET AT 46 m 26" HOLE DRLLED TO 3 O m 2" CASNG SET AT 799 m 7V 2 " HOLE DRLLED TO 535 m 3%" CASNG SET AT 525m 2 / 4 " HOLE DRLLED TO 744m 9%" CASNG SET AT 72m 8 / 2 " HOLE DRLLED TO 7" LNER SET AT 6" HOLE DRLLED TO

4 ANCHOR DRLLNG FLUDS AS OSLO STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A/S NORSKE SHELL ENGNEERS C. MEYJES 6 & Ran Anchors , bbls pre-hydrated gel mxed by WSPE John Allen : Ran T.G.B. Pcked up drllng assembly and spud well at 7. hrs. Drlled 36" hole to 38 m. POOH to nck up core bbl. Cut back vscosty of pre-hydrated gel by addton of 65 bbls drll water Cored from 38 m to m. POOH and servce core barrel. RH and cored from m to 399 m. POOH. RH wth 26" bt and 36" hole opener. Drlled to 43 m usng seawater and vscous plls wth returns to seabed. Mud engneer arrved on rg 2. hrs. Mxed 3 bbls prehydrated gel. Mud consumpton hgher than antcpated snce 3 bbls mud spotted on each survey (5 bbls sweep and 25 bbls left n hole) Drlled to 47 m. Surveyed and made wper trp to seabed to retreve survey. RH - m fll. Swept hole wth 5 bbls pll and pumped 7 bbls mud nto hole (hole capacty 43 bbls for gauge hole). POOH and rgged up to run 3" casng. Ran 3" casng to 46 m - no problems. Cement casng. Dsplaced wth seawater. Wated on cement /2 hr. Backed out runnng tool and jetted well head.

5 . ANCHOR DRLLNG FLUDS AS '^ OSLO STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A/S NORSKE SHELL ENGNEERS C. MEYJES POOH wth runnng tool. Lad down 36" BHA. RH and attempted to stab n wth 4 3/4" bt and 26" hole opener. Gude frame damaged whle tryng to stab n bad weather. Wated on weather 9 hrs and repared gude frame. RH. Stabbed n. Tagged cement at 449 m. Drlled out cement and shoe. Clean out rathole and drlled to 475 m. Sweot hole wth 5 bbls mud and spotted 5 bbls mud on bottom. POOH to run rser. Mxed 35 bbls pre-hydrated gel. Ftted shaker screens: 2/4, 2/4, 2/3, used screens whch had been used on prevous Fnshed POOH. Wated on weather 2 /2 hrs. Ran rser. Requested to mx pt (3 bbls) of kll mud at.35 SG Fnshed runnng rser. Made up core barrel and RH. Cored from 475 m to m. Made no progress. POOH wth core barrel. Stablzer hung up n dverter whle POOH. Elevators opened and STD DC's and core barrel dropped n hole. M/u overshot and bent jont and RH to fsh. Tagged fsh at 458 m but could not latch on. Weghted up 3 bbls pre-hydrated gel to use as kll mud. Mxed 3 bbls pre-hydrated gel.

6 tanchor DRLLNG FLUDS AS OSLO STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A/S NORSKE SHELL ENGNEERS C. MEYJES POOH wth fshng assembly. Unlatched and pulled rser. Made up overshot wth 2 /2" gude. RH and tagged top of fsh at 432 m. Engaged fsh and POOH wth same. Restrng new drllng lne Restrng new drllng lne. Vetco nspecton of blocks, crown etc. to check for damage caused when fsh was dropped (see )'. Ran and latched rser. Flled wth seawater. Made up BHA for 4 3/4" plot hole. Requested to run the gelled seawater mud for ths secton at a mnmum vs of 55-6 sees and to have all surface pts full wth 2 vs mud before startng drllng. ncreased pt volume and mxed gel as necessary. m ft RH to 46 m. Tested dverter and overboard lnes. Dsplaced hole to mud. Reamed to 475 m. Drlled to 58 m. Pump broke down. POOH to shoe to repar same. RH and drlled to 75 m. For hole dsplacement watered back pre-hydrated Bentonte wth seawater. ntal vscosty very hgh. Lost mud over shakers. Dluted back heavly wth seawater. Ran mud cleaner contnuously wth 2 mesh screens, plus desander and deslter as necessary. Excess volume caused by dluton was dsposed of by regularly dumpng of the gumbo box and sand traps.

7 ,_ ANCHOR DRLLNG FLUDS AS " OSLO - STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A / S NORSKE SHELL ENGNEERS C. MEYJES Drlled from 75 m to 85 m. Dropped survey and POOH to retreve same at shoe. RH - hole OK. Crculated bottoms up and spotted 338 bbls.35 SG vscous mud n the open hole. POOH to log. Rgged up Schlumberger. Ran SF, LDT/CNL. Both runs to bottom no problems. RH OEDP to dsplace hole to seawater. Ran seawater, deslter and mud cleaner whle drllng to control mud weght. Dumped 8 bbls surplus volume and gumbo box. Mxed 76 bbls extra mud at.35 SG whle drllng. Flled all avalable pts wth mud returns when spottng.35 SG mud. Dumped remanng returns (+5 bbls) RH to 45 m. Dsplaced 3" casng and rser to seawater. Saved 3 bbls of returns. Dumped balance (+_38 bbls) and crculated untl returns clean. Open dump valve on seabed. RH to 65 m and dsplaced out.35 SG mud wth seawater. RH to 8 m and dsplaced to seawater agan. Observed well - statc for 3 mns. Dsplaced open hole wth 365 bbls hvs mud (.8 SG). POOH. Unlatched and pull rser. Made up 26" BHA and RH. Mxed 3 bbls pre-hydrated gel RH wth 26" bt. Stabbed nto hole and RH to 46 m. Open 4 3/4" plot hole to 26" from 47 m to 8 m. Pumped 25 bbls hgh vs pll on each connecton. 2 hrs washed and reamed out ledge at 55 m. Otherwse no hole problems. Requested by Shell tool pusher to have all surface pts full of.35 SG hgh vs mud for pumpng nto hole before POOH to run casng. Pumped bbls mud from sandtraps to actve. Dumped remanng 4 bbls and cleaned pts. Mxed 25 bbls unweghted vscous mud. Weghted up 675 bbls mud to.35 SG and mxed a further 375 bbls of.35 SG mud.

8 . ANCHOR DRLLNG FLUDS AS '^ OSLO STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A / s NORSKE SHELL ENGNEERS Pumped 5 bbls vscous pll and chased out of hole wth 8, strokes seawater. Dropped survey and POOH to shoe - hole OK. Wated hr and RH. Stood up at 784 m. Reamed to bottom. Swept hole wth 5 bbls hvs mud and pumped 85 bbls.35 SG vscous mud nto hole. POOH to run casng. Rgged up and ran 2" casng. Stabbed nto well head. Wnd became too severe to run last 5 JTS of casng. Shut down watng on weather. Dumped and cleaned all pts and lnes. (Dumped 85 bbls mud left n bottom of pts). Mxed 5 bbls CaClp water for cement lob Wated on weather to 7. hrs. Pulled 3 JTS 2" casng. Ballasted down rg to 7' and pulled rest of casng. RH wth 26" bt to 459 m. Dsplaced hole to seawater. RH to 628 m and dsplaced agan. RH to 794 m - hole tght. Washed and reamed to 8 m. Pumped 5 bbls mud to sweep hole. Dsplaced hole to.35 SG mud. Pumped 3 bbls (hole capacty 4 bbls), POOH to run 2" casng. Dumped 5 bbls CaCl 2 water and mxed 345 bbls mud at.35 SG hvs whle pullng casng. After dsplacng hole to mud dumped balance of mud n pts (65 bbls). Started cleanng out pts and lnes Ran and cement 2" casng wth shoe at 799 m. Jetted well head clean.-ran stack and marne rser. Mxed 5 bbls CaCl 2 water for cement job. Dumped and cleaned all pts pror to takng on 64 bbls brne from boat. Started mxng new KCl/Polymer system. KCl ffasv

9 ANCHOR DRLLNG FLUDS AS OSLO - STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A / s NORSKE SHELL ENGNEERS ATKNSON.4.83 Ran and landed stack and marne rser. Tested BOP's. POOH wth test plug. Run wear bushng. Fnshed mxng KCl/Polymer system (total of 55 bbls bult) weghted up to.3 SG for drllng out. Flled sand traps wth mud also Unable to set wear bushng. POOH. Carred out repars. Set wear bushng. Lad down excess HWDP at 26" BHA. Made up new 7 /2" BHA. RH to 77 m. Pcked up kelly. Tagged cement at 78 m. Drlled cement from 78 m to 799 m wth seawater. Dsplaced to mud and drlled 7 /2" hole from 8 m to 82 m. Crculated bottoms up and hole clean. Carred out leak of f test. Gave leak of f at equvalent mud weght of.49 SG. Drlled ahead from 82 m to 825 m. Took on 39 bbls brne total n pt no. 2, 3 and 4. Started mxng new volume n pt no. 2 and pt no. 3. Total of 55 bbls, Drlled 7 /2" hole from 825 m to 987 m. Dropped survey. POOH to 2" shoe (max., bs overpull frst stand). Retreved survey. RH. Drlled ahead from 987 m to 82 m. (Used Hallburton to pump also after 8. hrs due to lack of power for two rg pumps. Slower ROP - down to m/hr. Losses over shakers when sold cuttngs too great to handle due to hgh ROP. Mxed new volume pt no. 4 and no. 3. (Total of 6 bbls at.3 SG). ncreased Ancopol polymer content whle drllng (generally add can per hr). Dumped and cleaned sand trap durng survey wp^r trp A'ssw

10 tanchor DRLLNG FLUDS AS OSLO STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A/S NORSKE SHELL ENGNEERS C. ATKNSON Drlled 7 /2" hole from 82 m to 2 m. Started usng 2 rg pumps at 7. hrs. Drlled ahead from 2 m to 68 m. Crculated /2 hr. Dropped survey. POOH for wper trp to shoe. Tght hole from 95 m to 895 m (max. 25, bs overpull). Pcked up kelly at 98 m. Crculated /2 hr. POOH to shoe. Retreved survey (/2 ). RHto52 m. Broke crculaton Reamed and washed to bottom (2 m fll). Drlled 7 /2" hole from 68 m to 285 m. Treated system wth 4 ppb KCl after some hydraton of cuttng startng to be notceable. Drlled 7 /2" hole from 285 m to 349 m. Crculated 3/4 hr. Dropped survey (/'2 ),pooh for wper trp to shoe. Tght hole at 9 m. Pcked up kelly. Crculated /4 hr. Contnued POOH to shoe. RH. Reamed and washed from 62 m to 8 m and 34 m to 349m. Contnued drllng ahead from 349 m to 372 m. POOH to change bt. Tght at 35 m to 3 m. Changed bt. RH to 228 m. Tght hole. Washed down. Contnued RH to 36 m. Washed to T.D. - no fll. Drlled ahead from 372 m to 455 m. Mantaned K at approx.4 ppb n actve system. Mxed 23 bbls over mud volume n pt no Drlled 7 /2" hole from 455 m to 535 m (casng depth). Crculated /2 hr. Dropped survey (/2 ). Wper trp"to shoe. Tght at 495 m to 49 m. Pumped 3 JTS out of hole. Contnued POOH. RH. Tagged bottom at 535 m - no fll. Crculated bottoms up and cleaned hole. POOH - no drag. Ran Schlumberger logs. Made up casng hanger and hang off tool and cement head. RH wth bt for clean out trp pror to runnng casng.

11 ANCHOR DRLLNG FLUDS AS OSLO STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A / S NORSKE SHELL ENGNEERS C. ATKNSON/ J. S ETCH EL Contnued RH for clean out trp. Ht brdge at 523 m. Broke crculaton. Washed to T.D. from 523 m to 535 m. Crculated hole clean. RH. Washed well head area. Fnshed POOH. Pulled wear bushng. Rgged up and ran 3 3/8" casng. Landed casng wth shoe at 525 m. Crculated 9 bbls mud - no losses. Cement casng. Full returns (55 bbls). Dsplaced cement wth seawater. Lost returns after 242 bbls (lost total of 38 bbls mud before Dumpng olug). Started dumpng and cleanng pts after cementng Fnshed pumpng plug wth 2 ps. P-tested casng to 25 ps. No back flow. POOH wth runnng tool. Pulled wear bushng. RH wth test plug. Tested BOP's. Lad down 7 /2" BHA. RH wth wear bushng and set same. Made up new 2 /4" BHA. RH to 54 m. Slpped and cut lne. Tagged cement at 5 m. Drlled cement from 5 m to 53 m. Fnshed dumpng and cleanng all pts, sand traps, lnes and dtches. Took on CaCl2 brne _+.2 SG (57ppb) from boat. Total 83 bbls. Dluted to.7 SG wth drll water (38 pob CaCl 2 ). Mxed total 395 bbls of.4 SG non-damagng chalk mud wth bacteracde and.3 ppg Enorflo-S (actve) and /2 ppb HEC and 2 ppb CaCO3 N-4 and 2 ppb CaC 3 N-5 and 2 ppb CaC3 N Contnued drllng cement wth seawater from 53 m to 524 m. Crculated hole clean. Dsplaced to mud. Drlled out cement and7 /2" rat hole from 524 m to 535 m. Drlled 2 /4" hole from 535 m to 536 m. Leak off test (leak off equvalent.5sc Drlled ahead from 536 m to 555 m. Crculated bottoms up for sample after drll break. POOH to make up 3" core barrel. Recovered core (82 %). Made up new BHA wth 6' core barrel. RH to contnue corng. Mxed pts no. 3 and 4 new mud (total 64 bbls) after dsplacng hole. Bypassed sand traps untl new mud volume avalable. afaear-

12 ANCHOR DRLLNG FLUDS AS OSLO - STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A/S NORSKE SHELL ENGNEERS C. ATKNSON/ J. SETCHEL.4.83 Contnued RH. Tght hole from top of rat hole (555 m). Worked ppe to bottom (564 m). Cut core from 564 m to 578 m. Barrel jammed. POOH. Recovered core (35 %). Made UD new core head. RH. Crculated and washed hole clean at 555 m to 578 m. Cut core from 578 m to 592 m. POOH. Recovered core (68 %). RH wth core barrel. Slpped and cut drll lne. Contnued RH ncreased system mud weght to. 5 SG wth CaC3. Mxed /4 ppb HEC to mantan vs >7 and mprove flud loss oropertes. Notceable mprovement n flud loss also wth addtons of CaC Fnshed RH. Tagged bottom at 592 m - no fll. Crculated /2 hour. Cut core from 592 m to 6.5 m. POOH. Recovered core (99.8 Servced core barrel. RH. Cut core from 6.5 m to 629 m. POOH. Recovered core ( %). Lad out core barrel. Made UD new 2 /4" BHA. RH wth bt to 547 m. Broke crculaton. Reamed 2 /4" hole from 555 m to 68 m from 8 /2" core hole. Mantaned HEC Caustc. concentraton n system and ph level wth Reamed from 68 m to 629 m (8 /2" - 2 /4" hole). Survey (/2 ). Wper trp to shoe. RH. Drlled 2 /4" hole from 629 m to 735 m (T.D.). Crculated bottoms UD. Survey ( /4Q) POOH to shoe (some overpull from 6 m to 635 m). RH. No fll. Crculated hole clean. POOH - no draq. Rgged UD and ran Schlumberger logs. (SF/sonc/GR/SP - LDT/CNL/CAL/NGT). NOTE; Losses to the hole seen when startng pumas after each connecton. Also losses whle loggng. Kept hole full wth trp tank pump. ffresrf

13 ANCHOR DRLLNG FLUDS AS OSLO STAVANGER DALY SUMMARY REPORT WELL NAME 3 /?_ OPERATOR A/S NORSKE SHELL ENGNEERS C. ATKNSON/ J. SETCHEL 3. 4.R Logged. Dumped and cleaned out sand traps, gumbo box and shaker box and all dtches. Dumped 25 bbls pt no. 4 and 25 bbls pt no. 2 and cleaned out both pts. Servce no. 2 mxng pump. Cleaned out all rg pump sucton lnes Contnued loggng Fnshed loggng. Made up casng hanger and runnng tool and stand n Derrck. RH wth 9 meters of fll. Crculated hole clean. Ran CST. RH wth meters fll and reamed to T.D. 735 m.

14 ANCHOR DRLLNG FLUDS AS OSLO - STAVANGER DALY SUMMARY REPORT WELL NAME 3/2- OPERATOR A / S NORSKE SHELL ENGNEERS RT.ANCHARn Drlled 2 /4" hole from 735 m to 744 m. Cleaned hole and POOH. Pulled wear bushng and ran 9 5/8" casng. Crculated 29 strokes. Cemented 9 5/8" casng. Check for back flow - returns. Pressure up to ps and bled off n 3 mnutes ntervals 7 ps. Back flow at 3 ps. Pressure un to 5 ps and wated for cement Wated on cement. Tested BOP's. Unable to pump through kll lne. Pulled rser and top package after dsplacng rser to seawater. Worked on BOP's. /.«TST»

15 SUMMARY OF EVENTS OPERATOR: A/S NORSKE SHELL WELL NO. 3/2-36" HOLE/ 3" CASNG NTERVAL The 36" hole was drlled to 47 m. Seawater and vscous plls were used wth returns gong to the seabed. Cores were taken at 38 m to m and ra to 399 m. Mud consumpton was hgher than expected snce 3 bbls of mud was spotted on each survey. Before settng casng the hole was flled wth 7 bbls. 3" casng was run wthout any problems.

16 RECOMMENDATONS 36" HOLE Ths secton was drlled accordng to program wth no major problems.

17 SUMMARY OF EVENTS OPERATOR: A/S NORSKE SHELL WELL NO. 3/2-26" HOLE/ 2" CASNG NTERVAL (4 3/4" PLOT HOLE) The 4 3/4" hole was drlled to 85 m wth seawater and gell/seawater mud. Whle runnng nto hole the gude frame was damaged and had to be repared. Cement was tagged at 449 m and drlled wth seawater and vscous mud, the rser was then run. 35 bbls of prehydrated gel was mxed and 3 bbls of kll mud was also mxed (.35 SG). After the rser was run a core barrel was run n hole and drlled from 475 m to 476 m makng no progress. Whle pullng the core barrel out of the hole the assembly was dropped n the hole, the fsh was tagged at 458 m but could not be latched on to. The rser was then pulled and the fsh engaged and POOH. After makng rg repars, ran n hole as requested to run gelled seawater at 55-6 vscosty and all surface pts full wth 2 vscosty mud. Drlled to 58 m and then made rg repars, resumed drllng to 75 m. Solds equpments was run at all tmes and mud was dluted heavly wth seawater. The hole was then drlled to 85 m and 338 bbls of.35 SG was spotted and loggng was carred out wth no problems. The hole was then dsplaced to seawater wth returns saved. When the complete hole was flled wth seawater the well was observed for 3 mnutes. The hole was then dsplaced wth 365 bbls of mud (.8 SG) and then rser was pulled. The 4 3/4" plot hole was opened to 26" from 47 m to 8 m wth 25 bbls plls of hvs mud spotted on each connecton. A ledge was washed and reamed at 55 m, otherwse no hole problems. Surface pts were kept full wth.35 SG mud for dsplacement before casng. The hole was then swept clean and a wper trp made. Whle runnng n the hole had to ream from 784 m to bottom. The hole was then flled wth 85 bbls.35 SG, vscous mud. 2" casng was run but had to shut down due to weather. 5 bbls of CaCl2 water was mxed for the cement job. The hole was agan flled wth seawater and tght hole was found at 794 m. The hole was then cleaned at 8 m and dsplaced agan to.35 SG vscous mud. The 5 bbls of CaCl2 water was dumped and mxed agan n order to have space for vscous mud. 2" casng was then run and cemented.

18 26" RECOMMENDATONS HOLE Ths secton was drlled wth no major problems except for mechancal and weather mshaps causng an excess of mud to be mxed n order to keep the hole n shape.

19 l l l l SUMMARY OF EVENTS OPERATOR: A/S NORSKE SHELL WELL NO. 3/2-7 /2" HOLE/ 3 3/8" CASNG NTERVAL A total of 55 bbls of KCl/Polymer mud were mxed at a weght of.3 SG pror to drllng out the 2" casng shoe. Cement n the casng was drlled out to wthn l m of the shoe wth seawater, and the hole then dsplaced to mud wth no cement contamnaton. After drllng the shoe and cleanng out the 26" rat hole from 799 m to 8 m, a 7 /2" hole was drlled from 8 m to 82 m and a leak off test was taken. Ths gave an equvalent break down at.49 SG. Drllng then contnued ahead to the casng pont of 535 m, over a perod of 3 /2 days and a bt change at 372 m. The secton from m to m approx. was drlled at a slower ROP ( m/hr) due to reduced avalable pump pressure wth one rg pump down and the use of the Hallburton pump requred. Trps were made for surveys approx. each 5 m and tght hole was experenced wth some swabbng when POOH on each new secton but RH was no problem and a second trp through the secton produced no overpull each tme. The KCl/Polymer system was run wth a K + of approx. 4 to 42 ppb whch was found necessary together wth polymer (Ancopol) addtons (3/4 ppb) for adequate nhbton of clays, otherwse some hydraton of cuttngs was notceable. Mud weght n the secton was ntally.3 SG and rose to.35 SG by T.D. and gave good stablty. Schlumberger logs were then run after a clean out trp and the 3 3/8" casng was run and cemented wth shoe at 525 m. Returns were lost (total approx. 3 bbls) durng the cement dsplacement. All surface mud system was then dumped and pts cleaned out pror to mxng new mud system for the 2 /4" secton.

20 RECOMMENDATONS 7 /2" SECTON t was felt that use of.3 SG ntally, ncreasng to.35 SG at TD resulted n much better hole stablty than prevous wells where.26 SG was started wth and ncreased to.35 SG after some unstable hole had been encountered. Therefore X C J. C.L.W.. *^ t J_ *- s JLO recommended J- ^*~ WllUU^llVl^lU to -W contnue V~*w'll»--LlUC use UO< of.3 SG as ntal weght to drll out 2" casng.

21 SUMMARY OF EVENTS OPERATOR: A/S NORSKE SHELL WELL NO. 3/2-2 /4" HOLE/ 9 5/8" CASNG NTERVAL After all pts were cleaned out a total of 83 bbls of CaClo brne at.2 + SG was taken onboard to mx, after dluton wth drll water, an ntal batch total of 395 bbls of "non-damagng" chalk mud (CaCl2/CaC3/Polymer). The composton of ths mud was ppb Enorflo-S (a substtute for XC-Polymer n ths type of system) and /2 ppb HEC and 2 ppb N-4 CaCC>3 and 2 ppb N-5 CaCO3 and 2 ppb N-5 CaCC>3. These values were used after a seres of plot tests had been run both wth seawater and drll water dlutons of orgnal CaCl2 brne receved. After drllng out cement to 3 3/8" shoe, and crculatng the hole clean, the hole was dsplaced wth the new mud and drllng contnued to 536 m where a leak off test was taken, gvng an equvalent break down at.5 SG. Drllng ahead contnued to 555 m where an ROP drll break was crculated out gvng sands and t was decded to start corng the Jurassc reservor. An ntal run of 3 ft core barrel was made for corng 555 m to 564 m, then a 6 ft barrel was run for a furhter 4 cores to depth of 629 m where shows were then neglgable. Reamng out of the cored secton was then carred out (555 m to 629 m) and then 2 /4" hole drlled to 735 m. A further total of 64 bbls of new mud was mxed after dsplacng the hole and treatments whle corng and drllng were only made for mantenance of HEC concentraton and flud loss control and CaCO3 levels and mnmal Caustc for ph mantenance.

22 SUMMARY OF EVENTS OPERATOR: A/S NORSKE SHELL WELL NO. 3/2-?. /4" HOLE/ 9 5/ft" CASNG NTERVALcont' d As drlled clays were pcked up the flud loss dropped greatly from 38 cc down to approx. 5 cc wth ppb MET. Mud weght rose from.5 to.6+ SG by the end of the secton. The only solds control used was shaker wth screens 2, due to non possble use of 6 hydrocyclone equpment whch would have throuwn out too great an amount of CaCO3. The man factor for runnng the system was to have clean fltrate to decrease any skn damage to reservor pror to testng. The mxng of the system was relatvely easy wth Enorflo-S comng nto soluton wth mnmal shear requred as wth the HEC - but order of addton was found to be vtal from plot tests, requrng Enorflo-S mxng frst otherwse HEC would not shear n and form "fsh eyes". Consderable tme was requred though for mxng of CaCO3 sacks due to the hgh contamnaton necessary to gve a.5 SG mud weght. The only real problem durng drllng usage seemed to be "seepage" losses when turnng on pumps after each connecton. Total losses durng drllng were approx. bbls. An extensve loggng program was then carred out for a perod of 3 days when runnng n the hole 9 m of fll was found. The hole was crculated clean and a CST was run. After runnng n the hole m of fll was found and reamed to 735 m and then drllng 2 /4" hole to 744 m T.D. The hole was crulated clean and 9 5/8" casng was then run and cemented.

23 RECOMMENDATONS 2 /4" HOLE The only recommendaton to be made would be to keep a small amount of Mca n the mud to stop seepage losses to the formaton, although ths may not be compatable wth the use of a non-damagng chalk mud. Also as ponted out before the order of mxng should be carefully watched.e. Enerflo-S should be mxed frst n order to prevent fsh eyes from the HEC.

24 OPERATOR A/S NORSKE SHELL WELL NO. 3/2- MATERAL CONSUMPTON & COST ANALYSS Meters 36" HOLE DRLLED TO 47 CASNG SET AT Meters FKSCX ACTUAL AMOUNT OF HOLE DRLLED ; 9 Meters DAYS ON NTERVAL DRLLNG FLUD SYSTEM SEAWATER AND VSCOUS BENTONTE PLLS MATERAL UNT SZE PROG. USED VARANCE ± US$ COST BENTONTE M/T?n ,96 CAUSTC SODA 25 KC/SX 5 R +?"* 76 O^ SODA ASH 5 KG/SX LME /SX 6 - f [.. COST/DAY us$ 3,84. TOTAL COST FOR NTERVAL us$ 2,336. COST/Mt.:»KRtx$ 3. 7 PROG. COST FOR NTERVALUS$ + 8,56. ENGR. COST COST VARANCE FOR NTERVAl$ 4,28.

25 OPERATOR A / s WELL NO. 3/2- NORSKE SHELL MATERAL CONSUMPTON & COST ANALYSS 26" HOLE DRLLED TO g5 Meters rø&x 2,, CASNG SET AT Meters 799 FK«ACTUAL AMOUNT OF HOLE DRLLED 345 ^e' ers DAYS ON NTERVAL n K& DRLLNG FLUD SYSTEM PLOT HOLE (4 3/4"): GELLED SEAWATER/26" HOLE: SEAWATER AND VSCOUS PLLS MATERAL UNT SZE PROG. USED VARANCE ± COST BARTE M/T BENTONTE M/T s,;>4n nn CAUSTC SODA ,8. SODA ASH 5 KG SPERCELL C nn LF COST/DAY US5 4,348- COST/Mt. fucr. $ ENGR. COST /fss-n- _ ' TOTAL COST FOR NTERVAL US $ 47,835. PROG. COST FOR NTERVAL US$ 3,74. COST VARANCE FOR,NTERVAL $ + 34, Q95. Q

26 OPERATOR A/S NORSKE SHELL WELL NO. 3/2- MATERAL CONSUMPTON & COST ANALYSS 7 /2" HOLE DRLLED ' ro 535 Meters 6CTJX OUNT OF HOLE DFBLLED 72 LUD SYSTEM KC/POLYMER 3 3/8" BASNG SET AT Meters XBCK DAYS ON NTERVAL Meters 525 *** MATERAL UNT SZE PROG. USED VARANCE ± US$ COST BARTE M/T ,564. o KC BRNE BBLS ,44. KC SACKS 5 KG ,86. rahsttf. 25 K n 95 «7 8,74. SODA ASH T.F-5 CMC (LOVS) DRSPAC REG. ANCOPOL (CANS) DRTT.T.TNf; HETKR^KNT DEFOAMER (CAN).- 5 KG 5 LBS?nn T. 2 L n ,95f_nn 5,5. 2, COST/DAY COST/Mt. ENGR. COST atusnr US?, TOTAL COST FOR NTERVAL US$ 86,36. PROG. COST FOR NTERVAL US$, COST VARANCE FOR NTERVAL? 4,26.9

27 f OPERATOR A/S NORSKE SHELL WELL NO. 3/2- MATERAL CONSUMPTON & COST ANALYSS 2 /4,, HOLEDRLLEDTO ^^ Meters R*tx 9 5/8" CASNGbblAl CASNG SET AT 72Q ^ ACTUAL AMOUNT OF HOLE DRLLED ;, DAYS ON NTERVAL ^ u u CT H u DRLLNG FLUD SYSTEM CaCl 2 /CaCO3/POLYMER (NON-DAMAGNG CHALK) Meters Meters n MATERAL UNT SZE PROG. USED VARANCE ± US$ COST BARTE M/T 8-8 BENTONTE 5 KG 5-5 LGNO CAUSTC CMC /LOVS) LF-5 XC-POLYMER DRSPAC REG. DRLLNG DETERGENT H EC ENORFLO-S GLUTARALDEHYDE (CAN SODA ASH 5 LBS 5 LBS 2 L 2 L 2 L 5 KG o 2. n o 4, , PEFOftHPR (<"AN)?n T. n? no CALCUM CHLORDE BBLS ,4. CALCUM CHLORDE (SX ) 5 KG ,28. CALC UM CARBONATE ( S C)5 KG ,864. COST/DAY us< 4,6.49 TOTAL COST FOR NTERVAL us<j 46,4.88 COST/Mt. <%&. j PROG. COST FOR NTERVAL USJ 32,97. ENGR. COST COST VARANCE FOR NTERVAL^ 3,44.88 /. *srr

28 OPERATOR WELL NO. TOTAL C( DNSUMPTON & COST ANALYSS TOTAL DEPTH A/S 3/2- NORSKE SHELL Meters 744 X&K Meters TOTAL HOLE DRLLED...,.,. 374 jorøt TOTAL DAYS 33 MATERAL UNT SZE PROG. USED VARANCE ± us$ COST SODA ASH LME SPERCELL C LF-5 CMC (LOVS) DRSPAC REG. XC-POLYMER Kfl BRTNF. KC SACKS ANCOPOL DRLLNG DEFOAMER H EC ENERFLO-S GLUTARALEDHYD DETERGENT CALCUM CHLORDE CALCUM CHLORDE SX CALCUM CARBONATE DOST/DAY us$ :OST/Mt. orcflt.$ ENGR. COST V.-M-ur>- ";., 5 KG 5 LBS 5 LBS BRLS 5 KG 2 L 2 L 2 L 2 L BBLS 5 KG 5 KG OQO ,836.2 TOTAL COST FOR NTERVAL^ 92, PROG. COST FOR NTERVAL <j 55,2. COST VARANCE FOR NTERVAL} + 37,39 5, ,5 5, , nn 4, R , BARTE M/T , 375 BENTONTE M/T ,336. CAUSTC

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