JPDA PRODUCTION

JPDA: Monthly Production
Barrels of Oil Equivalent (BOE)

Previous 3 months

MonthProduction (BOE)
Jul '173,579,747.04
Aug '173,187,784.22
Sep '172,468,710.68

Autoridade Nacional do Petróleo

LAFAEK, Well Description

Well: BU-W05A

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ANP ID:

W05A

Region:

JPDA

Contact Area:

JPDA 03-12

Field Name:

Bayu Undan



Well Type:

Exploration

Classification:

Gas - Condensate



Total depth (m):

3157

RKB (m):

45.4

Seabed (m):

78.3

Start:

30-April-2003

Finish:

08-June-2003

Well Data (release):


Status:

Approved


Summary:

The BU-W05A development well was drilled from the BU-WP1 platform by the Ensco 104 jack up rig. BU-WP1 is located in the eastern half of the Bayu-Undan gas condensate field which is in the Production Sharing Contract (PSC) areas of JPDA 03-12 and JPDA 03-13, North Bonaparte Basin, Timor Sea, offshore Northwest Australia. The location is approximately 250 km south of East Timor and 480 km northwest of Darwin. ConocoPhillips (03-12) Pty Ltd is the operator.

The Ensco 104 jack up drilling rig was on contract on 1st May 2002 and on location over the BU-WP1 platform on 15th May 2002. Water depth was 78.30 m and the rig rotary table elevation was at 45.44 m above sea level (LAT). The Total depth (TD) was

Following the unsuccessful drilling operations on BU-W05 and associated sidetracks BUW05ST1 and BU-W05ST2, the well plan was revised and an alternative target was planned. Slot reclamation operations commenced on 1st May 2003 with retrieval of the 13 ⅜" casing from 905 mMDRT and then setting of kick off plugs inside 20" casing to a depth of 753 mMDRT. BU-W05A was kicked off from 808 mMDRT on 5th May, 2003 and drilled to a final well total depth of 3557 MDRT on 2nd June, 2003. Two cores were cut to determine rock mechanic properties within the overburden. Core 1 was cut in the Lower Turnstone Formation (2390-2399mMD) and Core 2 was cut in the Wangarlu Formation (2803-2812mMD).



SAMPLES, SIDEWALL CORES CONVENTIONAL CORES

Drill Cuttings

Composite washed and unwashed ditch cuttings samples were collected from kickoff to Total Depth. Samples were collected at predominantly 10 m intervals in the 17 ½" and 12 ¼" hole sections and at predominantly 5 m intervals in the 8 ½" hole section.


Ditch Cuttings Sampling Type and Frequency
Interval
mMDRT
Sample
Frequency
Sample TypeDistribution
817.0 to 3315.010 mSpot SamplesFor description only

Unwashed:
ConocoPhillips 1 set
East Timor Gov’t 1 set

Washed
ConocoPhillips 1 set
East Timor Gov’t 1 set
Geoscience Aust. 1 set
3315.0 to 3557.05 mWashed & Unwashed

Hydrocarbon Shows

Gas shows are summarized.

Cores

Two 9 m full hole cores were cut in the Lower Turnstone and Wangarlu Formations respectively. Coring operations are summarized below in Table.


Full hole Coring Operation
Core
No
Formation
Interval
(mMDRT)
Cut
(m)
Recovered
Comments
1
Lower
Turnstone
2390.0 - 2399.0
9.0
7.22 m / 80.2%
2
Wangarlu
2803.0 - 2812.0
9.0
9.0 m / 100%
Sidewall Cores

No sidewall cores were acquired.

LOGGING AND SURVEYS

LWD Logging

Sperry - Sun Drilling Services ran the open hole LWD logs that are summarised in Table below.


Open Hole FEWD Logging Suites and Intervals
Run
Hole

Size

Tool

String

Interval

(mMDRT)

Comments
50017 ½"
Dir-DDS-DGR-

PWD

808.0 -

1454.0

60017 ½"
Dir-DDS-DGR-PWD
1454.0 -2083.0
70012 ¼"
Dir-DDS-DGR-PWD-BAT
2083.0 -

2390.0

Hard connect on Directional Module/pulser damaged during surface tool makeup. Changed out same prior to RIH.
8002390.0 -

2399.0

Cut Core 1. No FEWD tools in hole.
90012 ¼"
Dir-DDS-DGR-PWD-BAT-ACAL
2399.0 -

2803.0

Wipe log acquired over Core 1 interval 2390.0 - 2399.0 mMDRT. DDS failed during trip in hole. PWD failed at 2543 mMDRT. ACAL data not useable due to damaged transducer (discovered post Run 1100).
100012 ¼"2803.0 -

2812.0

Cut Core 2. No FEWD tools in hole
110012 ¼"
Dir-DDSDGR-
PWDBAT-
ACAL
2812.0 –
3254.0
Wipe log acquired over Core 2 interval 2803.0 - 2812.0 mMDRT. No DGR, DDS and PWD below 2996 mMDRT
due to tool lower bus failure. Bad real time GR above and no data below 2990 mMDRT. No useable ACAL data due to damaged sensor.
120012 ¼"
Dir-DDSDGR-
PWDBAT-
ACAL
N/ATools failed shallow test. POOH, laid out BAT and changed out DGR-PWD-Dir tools.
1300
12 ¼"
Dir-DDSDGR-
PWDACAL
3254.0 -
3315.0
ACAL sensor failed on trip in hole.
1400
8 ½"
Dir-DDSDGR-
Res-
CNP-BATPWD-
ACAL
3315.0 -
3471.0
1500
8 ½"
Dir-DDSDGR-
Res-
CNP-BATPWD-
ACAL
3471.0 -
3557.0
Wireline Logging

Open Hole Wireline Logging Suites and Intervals
Suite
Run
Tool String
Interval (mMDRT)
BHT/Hrs Since Circ.
Comments
1
1
CAST-EMI-GR
3300.0-2071.5
No data/18.4EMI run to centralize CAST tool.
2
Wavesonic-EMI-SLDT-GR
3315.0-2078.0
119.0/37.4Density and wavesonic run in hi res mode 2820-2790m (1.5 Khz), 2820-2790 m(2.2 Khz) and 2410-2380 m(2.2Khz)
2
1
CAST-CBL-CCL-GR
3493.0-3151
No Data/29.6Ran unpressured repeat section 3493-3450m, main unpressurised pass 3508-3156m and pressurized main pass 3488-3151m.









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