Velocity String Installation & Performance Review VERMILION ENERGY S.W. TUMMERS

Transcription

1 Velocity String Installation & Performance Review VERMILION ENERGY S.W. TUMMERS

2 VOGN Overview Entered the Netherlands in 2004 by acquiring TOTAL s onshore assets; Acquisition included ~2 million Nm 3 /day of mature natural gas properties; 40 production locations, 60 producing wells, 5 water injection wells; Direct focus on production optimization: Install smaller diameter production tubing to improve well flow; Shut-off water encroachment zones; 2

3 Velocity String Details Currently Vermilion has installed 39 velocity strings (33 onshore, 6 on Zuidwal Platform); The sizes are: 1 ½ 1 ¾ / / 8 Material: mostly (used) coiled tubing (carbon steel); Hang off depth: just below DHSV until top perfs (also found in literature: best performance is reached between top perfs and 1 / 3 of top perfs); Typical assembly: usage of a packer and pump out subs; Typical reservoir pressure: 20 bars; Typical WHP: 5 bar; Typical flow: Nm 3 /day with 1 m 3 water. 3

4 Data Gathering and Modeling (1) 4

5 Data Gathering and Modeling (2) 5

6 Well Diagram Example and BHA VERMILION FIELD : LW EAST WELL : NIJEGA 9 RT /TH : 6.96 M. ANNULUS FLUID : COMPLETION DATE INHIBITED KCL BRINE : 4/80 S.G VOLUMES DRILLING DEPTHS TUBING : 9.52 m3 TOP CEMENT IN 7" : m/rkb ANNULUS : m3 9 5/8" SHOE : 1200 m/rkb 1 HOLE : m3 CEMENT TOP BEHIND 7" : 900 m/rkb 2 Xma s T REE MERIP 11".5000 X 7 1/16".5000 TUBING HEAD TUBING HANGER MERIP 3 1/2" EUE TOP X 3 1/2" VAM BOTTOM. 3 L MASTER VALVE MERIP 3 1/8" X 5000 U MATER VALVE MERIP 3 1/8" X 5000 SWAB VALVE MERIP 3 1/8" X WING VALVES MERIP 3 1/8" X TOP CAP MOTI 6 1/2" - 4 ACME QUICK UNION. ST RING 6 ITEM QTY DESIGNATION Depth/Th ID/in HANGER WITH 3" CAMERON MERIP TUBING BPV PROFILE 2 1 PUP JOINT 3 1/2" VAM N80 9.2# 0,38 2, TUBINGS 3 1/2" VAM N80 9.2# 27,75 2, PUP JOINT 3 1/2" VAM N80 9.2# 29,27 2, " CAMCO B6 NIPPLE 30,05 2, PUP JOINT 3 1/2" VAM N80 9.2# 31,51 2, TUBINGS 3 1/2" VAM N80 9.2# 2, PUP JOINT 3 1/2" VAM N80 9.2# 2, , " BAKER F NIPPLE 2054,42 2, PUP JOINT 3 1/2" VAM N80 9.2# 2064,94 2,992 & ONE IDEM TBG JOINT 11 1 PUP JOINT 3 1/2" VAM N80 9.2# 2066,45 2, XTRA LG TBG SEAL RECEPTACLE EBA-1 SIZE ,09 4, SLICK JOINT WIT H 2.75" R BAKER PROFILE. 2074,47 2, PUP JOINT 3 1/2" VAM N80 9.2# 2075,00 2, PUP JOINT 3 1/2" VAM N80 9.2# 2075,52 2, ANCHOR SEAL NIPPLE K22 SIZE ,95 3, BAKER PACKER 84 SAB 40 X ,39 3, MILLOUT EXTENSION 5" VAM 2079,01 4, XOVER 5" VAM X 3 1/2" VAM 2079,20 2, PUP JOINT 3 1/2" VAM N80 9.2# 2082,20 2, " BAKER F NIPPLE 2082,55 2, PUP JOINT 3 1/2" VAM N80 9.2# 2083,57 2, TUBING 3 1/2" VAM N80 9.2# 2092,67 2, PUP JOINT 3 1/2" VAM N80 9.2# 2094,19 2, " BAKER F NIPPLE 2094,55 2, PUP JOINT 3 1/2" VAM N80 9.2# 2096,58 2, WIRELINE ENTRY GUIDE 2096,89 2, VELOCITY STRING m/th Packer-1.05 m Model C Nominal - Top sub is 3'' GS 35,00 1, External Coil connector-0.14 m (2.188'' OD, 1.25'' ID) 36,19 1, " Tapered Coiled tubing Wall Thick. = 0.145'' bottom, 0.175'' top 2121,60 1, External Coil connector-0.14 m (2.188'' OD, 1.25'' ID) 2121,74 1, Dual pump out sub- 0.26m (2.188'' OD 1.25'' ID) 2122,00 1, PERFORATIONS DEPTH/RT NORM CLASSIFIED : NO FROM T O BARKONE 2 2 1/8" 4 SHTS/FT. DEVIATION : 29dg

7 Example 1 7

8 Example 2 8

9 Example 3 9

10 Performance Summary Of the total of 39 velocity strings, 5 did not perform properly; This makes a success rate of 87,2%; Reasons for failures: Attempt as last resort (with the knowledge of low probability of success); Data is insufficient or wrongly interpreted; Last minute changes in design. 10

11 DHSV Restriction VERMILION FIELD : LW EAST WELL : OP 1 RT /TH : 5.00 m. ANNULUS FLUID : COMPLETION DATE : 1/ SG MGCL2 BRINE VOLUMES DRILLING 1969 m. TUBING : 4 1/2" : 16 m3 7" SHOE ANNULUS : 4.5 X 7 : TOP CEMENT IN 7" m HOLE : 39.3 m3 9 5/8" 1205 m. REE Xmas T 32 CAMERON TYPE F 11 " TUBING HEAD 2 TUBING HANGER CAMERON 11" X 4.5 EUE TOP X 4.5 VAM BOT. 33 L MASTER VALVE CAMERON GATE VALVE 4 1/16" F TYPE 3 U MATER VALVE CAMERON GATE VALVE 4 1/16" F TYPE WITH ACTUATOR 4 34 SWAB VALVE CAMERON GATE VALVE 4 1/16" F TYPE WING VALVES CAMERON GATE VALVE 4 1/16" F TYPE 5 TOP CAP 4 1/16" X 4 1/2" EUE BOX ST RING 23 ITEM QTY DESIGNATION Depth/Th ID/in WITH 4" CAMERON 0,26 4, TUBING HANGER BPV PROFILE 2 3 TUBING 4 1/2" VAM # N80 32,50 3, PUP JOINT 4 1/2" VAM # N80 35,43 3, BAKER 3.81" B SCSSSV NIPPLE 35,94 3, PUP JOINT 4 1/2" VAM # N80 38,74 3, TUBING 4 1/2" VAM # N ,18 3, PUP JOINT 4 1/2" VAM # N ,06 3, XOVER 4 1/2" VAM B X 4 1/2" TDS P 1863,60 3,875 9a 1 XTRA LONG TBG SEAL RECPTACLE EBA b 1 SLICK JOINT WIT H BAKER F PROFILE 1875,90 3, XOVER 4 1/2" TDS B X 4 1/2" VAM P 1875,88 3, BAKER K22 ANCHOR SEAL 1876,13 3, BAKER F1 PACKER SIZE ,94 4, MILLOUT EXTENSION 5" VAM 1878, XOVER 5" VAM X 3 1/2" VAM 1878,82 2, PUP JOINT 3 1/2" VAM N80 9.2# 1879,81 2, BAKER 2.75" F NIPPLE 1880,15 2, PUP JOINT 3 1/2" VAM N80 9.2# 1880,86 2,876 9a 18 1 TUBING 3 1/2" VAM N80 9.2# 1890,36 2, PUP JOINT 3 1/2" VAM N80 9.2# 1891,88 2,876 9b BAKER 2.75" R NIPPLE 1882,22 2, PUP JOINT 3 1/2" VAM N80 9.2# 1894,67 2, WIRELINE ENTRY GUIDE 1894,85 2, CONCENTRIC STRING INSTALLED APRIL '90 : OTIS "J" SLOT SLICK JOINT WITH X PROFILE OTIS GO PACKER XOVER 2 3/8" EU X CS HYDRILL TUBING STRING 2 3/8" CS HYD. N80 4.7# XOVER 2 3/8" X 1.9 CS HYD., NOGO TO LAND IN 3.68" F PROFILE TUBING STRING 1.9" CS HYDRILL N80 2.9# OTIS 1.5" X PROFILE 30 1 XOVER 1.9 CS HYD. X 1.25"NPT BPV PROFILE WITH SEAL SLEAVE, 0.8 M 0,26 1, " RECEPTICAL 1,50 2, /8" TUBING 35,25 1, SEAL STINGER FOR WR-SCSSSV 35,50 1, BPV PROFILE WITH SEAL SLEAVE, 0.8 M 0,26 1, " RECEPTICAL 1,50 2, /8" TUBING 35,25 1, SEAL STINGER FOR WR-SCSSSV 35,50 1,900 PERFORAT IONS /8" UNIJET " SCALLOP NORM CLASSIFIED : NO /8" UNIJET DEVIATION : VERT ICAL REVISION:

12 Future Developments and Challenges Challenges: Pulling velocity strings (corrosion); Barriers. Future Developments: Exemption for DHSV for mature onshore gas wells? DHSV system installed in the velocity string so they can be run to surface? Expensive?? 12

13 Conclusion Velocity strings in mature onshore gas wells, despite the challenges, offer a cost effective way of deliquifying those (small) wells. 13