DOE Office Of Fossil Energy - Phillips Petroleum Company

Horizontal CO2 Injection Profile 6C-25h


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Introduction:

This is the second profile log run on this horizontal injection well. Click here to see the results from the Injection Profile ran on water injection.


South Cowden 6C-25H
Casing7" 26# J-554955' MD - 4681' TVD
Tubing31/2" Duoline
PackerPLS4923' MD
X-Nipples2.313" I.D.4197', 4921', and 4933' MD
Wireline Re-entry Guide4943' MD
Open Hole61/8" 4955' - 6890' MD
Injection Rate3.5 MMCF CO2
Injection Pressure1200 PSI
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Work Log
Phillips Petroleum Company
South Cowden, 6C-25H
File Number 13,628
October 3, 1996

October 3, 1996

07:00 Arrive on location.

07:30 Rig up BJ Services coiled tubing unit.

08:00 Rig up Slicklogger encoder and computer system to BJ coiled tubing unit.

Rate and Pressure: 3,415 mcf CO2 at 1186 psi.

09:30 Attach 15' of 1.375" O. D. Dummy Bars and a 2.25" O. D. Spinner Dummy.

09:49 Pressure test lubricator and injector head to 1200 psi.

10:15 RIH with 15' of 1.375" dummy bars and a 2.25" spinner dummy to simulate Slicklogger logging tool.

11:20 Stop at 5500' (WL). This put us past the two restrictions seen on the last log ran 7-31-96.

12:00 Land Dummy in lubricator and bleed pressure. CO2 forms ice plugs in coiled tubing and leaves 800 psi above restriction. Must wait till plug melts before removing dummy. Mr. Green is consulted about the possibility of getting a N2 truck on location to purge tubing for safety and time reasons for future logging passes. He agrees and BJ is called to supply service.

13:52 Start Slicklogger tool program. We were able to leave a cross over connection in the end of the coiled tubing to protect personnel from pressure.

14:15 Land Slicklogger in lubricator and wait or N2.

14:21 N2 equipment arrives on location.

14:29 Pressure up coiled tubing and lubricator to 1300 psi with N2.

14:33 Zero counter and Slicklogger Depth Interface Unit.

14:43 RIH with coiled tubing and Slicklogger tool.

15:26 Log in at 30 fpm from 4800' (WL).

15:50 Rate and Pressure = 3,458 mcf at 1204 psi

16:45 Set down at 6749' (WL).

16:46 Log up at 40 fpm from 6749' (WL) to 4800' (WL).

17:34 Log down at 80 fpm from 4800' (WL) to 6700' (WL). We intentionally stopped short to prevent damaging the tool at an accelerated speed.

17:59 Log up at 80 fpm from 6700' (WL) to 4800' (WL).

18:27 Shut off injection to well, 1180 psi.

18:57 Shut-in pressure is 1170 psi.

19:27 Run One Hour Shut-in pass from 4800' (WL) to 6880" (WL). We did not see the restriction in the well at 6700' - 6749'.

20:27 Pull up to 4800'(WL) at 80 fpm.

21:01 Run Two Hour Shut-in pass from 4800' (WL) to 6880' (WL).

22:01 Pull out of hole with coiled tubing and Slicklogger tool.

22:31 Begin injection of N2 with coiled tubing passing 4000' (WL).

23:20 Land tool in lubricator and bleed pressure out through coiled tubing to prevent killing Slicklogger tool in cold conditions and prevent freezing of coiled tubing and wellhead.

October 4, 1996

00:10 Download data from Slicklogger tool.

00:25 Process data, integrity looks good.

00:30 Rig down coiled tubing and Slicklogger System.

01:30 Leave location.


Conclusions:

Click here to see the LOG PLOT.

Injecting and shut-in temperatures indicate fluid movement through the horizontal, open hole completion out to approximately 6620 feet MD with a major fluid loss at 5340 - 5480.

Injecting temperatures, shut-in temperatures, injecting capacitance, and shut-in capacitance logs indicate water cross flowing from the end of the horizontal section to approximately 6620'. Shut-in capacitance logs also show a progression of water entering the wellbore from +6880' and an area near the major fluid loss at 5340' - 5480 filling the low areas of the wellbore, as indicated by the deviation survey. The last shut-in capacitance run (cyan line) shows the water level has risen to a point where it is spilling over into the middle section of the wellbore.

We have no evidence of any other losses in the open hole section. However, we must point out that we do not believe either the one hour shut-in or two hour shut-in temperatures to be true decay recordings. Flowmeter plots (not included in this web site) clearly show that CO2 is still expanding from the tubing, into the open hole, up to 3 hours after shut-in. The temperatures labeled as shut-in temperatures are actually injecting temperature passes at declining injection rates. This will mask any small storage's.

The 2.25" spinner did not operate consistently. There was a substantial amount of a powder like substance trapped in the flowmeter upon retrieving the tool.

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