JPDA PRODUCTION

JPDA: Monthly Production
Barrels of Oil Equivalent (BOE)

Previous 3 months

MonthProduction (BOE)
Feb '173,563,303.23
Mar '173,853,289.38
Apr '172,846,587.03

Autoridade Nacional do Petróleo

LAFAEK, Well Description

Well: BU-D13

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ANP ID:

D13

Region:

JPDA

Contact Area:

JPDA 03-12

Field Name:

Bayu Undan



Well Type:

Exploration

Classification:

Gas - Condensate



Total depth (m):

2533

RKB (m):

58.2

Seabed (m):

78.6

Start:

18-September-2003

Finish:

10-October-2003

Well Data (release):


Status:

Draft


Well Summary

The BU-D13 development well was drilled from the BU-DPP platform by the Ensco 104 jackup rig. BU-DPP is located in the western 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 250km south of East Timor and 480km northwest of Darwin. ConocoPhillips (03-12) Pty Ltd is the operator.

The Ensco 104 jackup drilling rig was on contract on the Bayu-Undan Field on 1st May, 2002 and following completion of drilling, completion and flow testing operations on the BU-WP1 platform the rig was towed to the BU-DPP platform jacket where it was pinned on location 23rd July, 2003.

BU-D13 was spudded on 18th September 2003 and currently BU-D13 is plugged and suspended.

Formation Tops

Formation Name
MDRT
TVDRTTVDLATThicknessComments
Sea Bed
Hibernia Marl
Grebe Sandstone Member
Johnson Formation
Intra Johnson J1
Johnson Marl
TOTAL DEPTH
137.4
1266.4
1438.8
1601.7
2115.9
2359.5
2533.0
137.4
1191.9
1307.3
1399.1
1664.3
1780.2
1864.6
- 79.4
-1133.9
-1249.3
-1341.1
-1606.3
-1722.2
-1806.6
-
115.4
91.8
264.9
115.9
-
-
SAMPLES, SIDEWALL CORES CONVENTIONAL CORES
Drill Cuttings
(Measured depths referenced to RT 58.0 m)
Ditch cuttings spot samples for geological description were caught at 10 m intervals in the
16" hole section between 846.4 m and 1700.0 mMDRT. Samples were not collected
between 1700.0 and 2533 mMDRT due to lost returns.

Table 1: Ditch Cuttings Sampling Type and Frequency

Interval
mMDRT
Sample
Frequency
Sample Type
Distribution
137.4 to 846.4
846.4 to 1700.0
1700.0 to 2533.0
None
10 m
No returns
Spot Samples
No samples - No returns
Hydrocarbon Shows
Gas shows are summarised.
Cores
No conventional cores were cut.

Sidewall Cores
No sidewall cores were acquired.

LOGGING AND SURVEYS

LWD Logging
(Measured depths referenced to RT 58.0 m)
Sperry-sun Drilling Services ran the open hole LWD logs that are summarized in Table 2.

Table 2: Open Hole FEWD Logging Suites and Intervals

Run
Hole Size
Tool String
Interval (mMDRT)
Comments
100
36"
No MWD tools run
200
36"
No MWD tools run
300
26"
DIR
173.9 – 846.4
400
16”
DIR/DDS/
DGR
846.4 – 1652.0
500
16”
DIR/DDS/
DGR
1652.0 – 2285.0
600
16”
DIR/DDS/
DGR
2285.0 – 2533.0
Tools left in hole after drillstring got stuck at 1561 mMDRT. String was backed off at 1386.5 mMDRT.

Wireline Logging

(Measured depths referenced to RT 58.0 m)

Wireline logging services were supplied by Halliburton Logging Services (HLS). No open hole logging operations were run in BU-D13.

Suite
Run
Tool
String
Interval
(mMDRT)
BHT/Hours
Since Circ.
Comments
1
1
Free Point
1383.0 – 1300.0
N/A
Pumped tool through crossover at 1338 mMDRT and through jars to 1383
mMDRT (pipe free to this depth).
Unable to go deeper. Pulled out of hole and installed two sets of swab cups and
third sinker bar.
1
2
Free Point
1525.0 – 1383.0
Drill string free to 1475mMDRT. Ran tool down into 8 ¼" drill collars and found slight movement in top collar but could not confirm same due to free point
tool failure.
1
3
DCST
1480.6
Backoff attempted at 6 5/8" heavyweight tool joint at 1480.6 mMDRT. DCST charge detonated but failed to sever string.
1
4
DCST
Backoff attempted at 1471.0 mMDRT while holding overpull and torque in string. DCST charge detonated but no surface indication of drill string parting. Severing operation failed.









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