WELL-TECH

COMPLETION REPORT

OPEN HOLE LOGGING

Well Name : BTJ-208

Report By

HENDRIK JEFRI SAHERTIAN

June-22-2013

WellTech – PT.COSL INDO

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I. WELL INFORMATION BTJ-208 is the name of the third well of Pertamina PBMSJ in Betung, Jambi. From

the picture below, we can see the location mark with “A”. This location is in Sumatra island.

Coordinat Loacation :

South : 870 6’ 45.430” East : 580 22’ 57.864”

Well and Rig Information.

Well Name BTJ-208 Field BETUNG Area JAMBI Drilling type Vertical Drilling Well Type Development Well Clasification Production Well Target Zone L2, L3, L4, L6, L7, and L8. Benakat Water

Formation Total Depth 491 m Rig Type 350 HP – Land Rig, Mobile Truck Mounted Drilling Floor Level ± 5 m from ground level Ground Level ± 55 m from sea water

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II. EQUIPMENT INFORMATION

We use Logging Truck with serial number 6401 in this location. For downhole tools, we can

see the information below : No. Description Serial Number ASSET NUMBER Qty. 1 Insulation Bar EIST63 281015 270151/270150 3 EA

2 Swivel tool ESWT61XA 260286 8302307 2 EA 3 Temperature/Tension/Fluid Resistivity

Sub ERMT61XA 270253 292366

2 EA

4 Remote Transmitting Tool ERTT71XA 270245 92985 2 EA

5 Digital Spectra Logging Tool EDST61XA 270040 292510 2 EA

6 Compensated Neutron Logging Tool ECNT73XA 281246 292168 2 EA

7 Litho-Density Logging Tool

EZDT71EA 260189 270048 2 EA

EZDT71MA 260189 270048 2 EA

8 Isolation Sub EIST61XA 270143 270147 2 EA

9 Dual Laterolog Tool

EDLT71EA 260194 270081 2 EA

EDLT71MA 2103188 2103091 2 EA

10 Micro Spherical Focused Laterolog EMSF61XA 281130 272410 2 EA

11 Digital Acoustic tool

EDAT61EA 292172 270073 2 EA EDAT61MA 292179 270073 2 EA EDAT61FA 292185 270073 2 EA

12

EDIB Slam Adapter

ESAT61XB

280856

270019 2 EA

13 Collar Locating Logging tool ECCL61XA 270106 280923 2 EA 14 Knuckle tool EKJT61XA 270109 270110 2 EA

15 GR/CCL tool(1392XA) GR/CCL 094805 094810 2 EA

16 Collar Locating Logging tool(2315XA) 2315XA 106111 106112 2 EA

17 Collar Locating Logging tool(2312XA) 2312XA 120704 812304 2 EA 18 Neutron tool decentralizer N/A N/A N/A 1 EA

19 ERSC EAOT61XA 281022 270130 2 EA

20 Sink Bar N/A N/A N/A 2 EA

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For radioactive source we use in this location we can see in table below :

Item Isotope name R/A Substance Intensity Source No Qty. 1 Ice Block Am-241Be 400mCi D-013 1ea 2 Neutron Source Am-241Be 18Ci 116418 1ea 3 Density Source Cs-137 2.5Ci 1218 1ea 4 GR Calibrator RA-226 2.5μCi WA-645 1ea 5 JIG Block Cs-137 500/40μCi 07-781(07-845) 1ea

For Total equipment we have in location we can see in table below :

No Description QTY Unit

1 Logging Truck ETS6401 1 ea

2 Dog House 1 ea 3 Tool Basket 1 ea

4 Source Box 1 ea

All equipments are still in good condition when arrived in location. We didn’t get any

problem when we do check tools. Only main screen computer must be replace to backup

screen because it has some problem in their colour view.

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III. PREPARATION

After arrived at location, we contact the geologist or company man to get job

programmes so we can know and arrange our plan to all crew before job.

We must do Pre Job Safety Meeting with safety officer in wellsite, we also give them JSA.

Before job we must pay attention to all of our tools condition because if some tools error

when we run logging, it will be big problem for us.

Make sure we check the tools condition for main tools and backup tools. We must use the

tools in best condition. After that give some mark on it, so easy for us to pick those tools

when we want to do our job.

Check the cable head condition (continuity and insulation) and pump some grease to

prevent the water enter into it. If neccesary, make another cable head as a backup.

Make sure diesel oil for our logging truck is enough until our job finish. Fill the tank

until full. Also, if we use generator we should pay attention to its oil level. If something

happend to our tools, find out the cause of the problem and try to fix it.

Make sure all the auxiliary tools is good condition and ready to use. Put the auxiliary

tools in proper place so we can easy to use when we do our job.

Make sure the radioactive source and calibrator in good condition and place it on the

safe area from people.

As an engineer, we have to make sure our unit inside the cabin in good condition,

check the LSP make sure the insulation and continuity test produce good result. Beside that,

we also make sure for another panel must be in good condition.

Make sure our computer also in good condition, and screen can be used for our job.

After all the stuffs above is done, then we are ready to do our job.

Before job, we must contact the geologist to confirm the sequence and the tools they

need to logging. After confirm we just wait the information from company man to start the

logging job. After we get information from company man, we go straight to location and

prepare the tools and rig up.

We move the logging truck straight to well. Remember the position must be straight,

so our cable can easy to move.

We ask for crane operator to move our tools in basket next to catwalk and pick our

tools from basket one by one and lay those down on catwalk. While doing that another

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operators can pull the wireline cable from cable drum and form it become “8” on the ground

as much as neccesary.

Move all the rig up equipments to drilling floor, set the upper and lower sheave wheel

and thighten the lower sheave wheel with proper chain on BOP. Make sure the tension cable

on tension device can bring tension information to our computer. Also make sure the speaker

is work. Prepare the clamp, make up table, spaner, and grease and put in proper place on the

drilling floor.

After finish now we can connect our tools to start our job.

Here are JSA when we want to do our Job.

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46.8 m – 491.3 m1

V. OPERATION PROCEDURES

Here is the table that show our programme we do in location No

Interval (m)

Bit (inch)

Casing (inch)

Mud Properties

Logging Job

Type SG Visc PV/YP

1 0 - 50 12 ¼ 9-5/8 Pre-Hydrated Gel

8.4 - 8.5 35-40 Not Required

2

50 – 491

8 ½

7

KCL PHPA Polymer

8.4 - 8.6

45-50

15-20/18-25

DLL-MSFL-GR-SP Sonic, Densitiy, Neutron, Caliper, CBL-VDL-GR-CCL

Picture beside show the interval we

must do the logging job. There only 1

interval as seen in the picture.

Section 1

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SECTION 1

Open Hole Interval : 46.8 – 491.4 m

Hole Size : 8 ½ inch

Job : (1) Resistivity Log (DLT & MSFL)

(2) Radioactive Log (ZDT and CNT) and Sonic Log (DAT)

(3) CBL & VDL

Time Of Job : Opeh Hole Job : June/9/2013

CBL Job @ 7” Casing : June/11/2013

Section 1 is 8 ½ in Open Hole. TD is set at 491.3 m and the previous casing shoe at

46.8 m. Logging sequence was based on client request start from Resistivity log, Radiocative

and Sonic log, and the last was CBL-VDL.

CBL job was held in defferent time after they set 7” casing along this interval.

(1). Resistivity Log

Here are the list of tools we use when we do resistivity log

Tools Serial Number Asset Number

SP

ESWT

ERMT

ERTT

EDST

EIST(28)

EDLT

EMSFL

EIST63

ESWT61XA

ERMT61XA

ERTT61XA

EDST61XA

EIST61XA

EDLT71XA

EMSFL61XA

281015/270151

8302307

292366

270245

270040

270143

260194

281130

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Logger depth @ 489.6 m

While the operator connect the resistivity tools, we load the calibration and

verification data for our tools in ELIS computer. Also we put some data about

Wellsite information and fill some information in Proccessing Parameters. These are

important engineering things we should never forget. Another thing we must ask

report about mud properties from Mud Engineer at wellsite, we also request for

sample of Rm, Rmf and Rmc and after that we must measure those values.

Those data are :

Rm@82°F = 0.08Ω, Rmf@82°F = 0.06Ω and Rmc@82°F = 0.18Ω.

After operator complete the tool string connection, then we can power on our tool

string, make zero point and after that we can start our job.

Logging Job :

From the Record up result, we get the

logger depth at 489.6 m while the

driller depth at 491.3 m. Casing logger

and casing driller at the same depth

46.8 m because we make depth

correction at casing shoe 9 5/8”.

For Repeat Log we start from TD until

355 m.

Some of logging results can be shown

like pictures below :

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Casing logger @ 46.8 m

From that result we can see that Rmsfl is separated with Rd and Rs. But Rd and Rs

itself have small separation. We can assume the permeability of this formation is not

so good

(2). Radioactive and Sonic Log

Here are the list of tools we use when we do radioactive log

Tools Serial Number Asset Number

ESWT

ERMT

ERTT

EDST

ECNT

EZDT

EDAT

ESWT61XA

ERMT61XA

ERTT61XA

EDST61XA

ECNT73XA

EZDT71XA

EDAT61XA

8302307

292366

270245

270040

281346

270048

292179

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Before we do this job, radioactive source must be placed at the proper spot on the drill

floor so is makes easy for operator to install or uninstall the source. Dont forget to

prepare the cover to prevent something down fall into the hole.

Before install the source, make sure the source chamber of CNT and ZDT in clean

condition. If not, then we must clean it first. The direction of CNT’s decentralizer and

ZDT’s caliper also must be same.

We also put the rubber stand off at EDAT upper and bottom body.

After that, install the source from CNT to ZDT. If uninstall from ZDT to CNT.

Make sure we already set the police line arround the well so nobody can come closer

to the well. Also for operator who install or uninstall the source, he must wearing the

protector to cover his body.

After Install, now we can Power On the tool string, make zero point at ERMT and

after that RIH the tools.

Logging Job

While RIH, we must catch first arrival wave along the cased hole (DT24 arround

57µs/ft) by set the gain and other parameters like search window and threshold to

certain value. After pass cased hole, we also keep to catch first this arrival wave. After

reach TD we open the EZDT caliper and start to record up untill passing casing shoe,

and after reach the cased hole we stop pull out the tools and make verification for

EZDT caliper.

Logging Result

From the logging job we get

result like some pictures beside:

Collapse hole makes density log

become not so accurate thats why

from picture we can see there is a

crossplot between density-

neutron but actualy it’s not oil or

gas show because in that interval

the resistivity value is so small.

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From both pictures above we can see there is no crosplot between density-neutron log

along this interval.

Along the collapse hole interval we can see that density is acting like have small

density, but in the smooth hole the value of density become normal again.

Sonic log is stable along this interval because we catch good arrival wave.

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From bottom interval

the quality of cement

bonding is already not

so good.

(3). CBL and VDL

Here are the list of tools we use when we do CBL and VDL

After set casing 7” we run CBL and VDL job. We use rubber stand off on EDAT so

the movement of the tools become smooth while rocord up and we can get better data.

After operators connect the tools, we can power on, set zero point and RIH.

Set the Search window at the first wave and observe the AMP3 data along the casing

hole interval.

Before record up fill the data we get in Max Observed Amp and then fill 100 in

Target Amplitude. After that we can start to record up until surface.

Logging Result

Here are some pictures about CBL and VDL

Tools Serial Number Asset Number

ESWT

ERMT

ERTT

EDST

EDAT

ESWT61XA

ERMT61XA

ERTT61XA

EDST61XA

EDAT61XA

8302307

292366

270245

270040

292179

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Along this interval the cement bonding is

very good

From this interval until top is

bad cement bonding

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V. TROUBLE ISSUE

Before do the job, we check our downhole tools condition and we found that there is

no problem with our tools. The only one problem is downhole signal and the cause was

coming from cable head torpedo. The ground cable almost broken thats why it can’t deliver

good signal to surface panel. We changed the cable with the new one and the problem is

solved.

Our main computer also have problem with colour show in its screen. We changed

main scree to backup screen and the problem solved. We found the problem was not coming

from the computer cable but from the screen it self, so better if the main screen is changed to

a new one from Jakarta.

The speaker panel inside the cabin also not working, we found that some lines inside

it is already not good after check the continuity to those lines one by one.

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VI. CREW EVALUATION Here are the list of Jambi crew member :

Engineer : Wu Fan

Hendrik Sahertian

Operator : Taufik H. S (Chief)

Bagus

Anthoni

Ferdika

Every person in this team play the important role. They already know their job, so

when the job start, they directly take their own duty.

They have good communication with engineers so make this team very solid.

Bagus already start to learn about how to winch by Taufik and he shows good understanding.

Next job he can try to winch again. Anthony also have to learn about this.

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VII. CONCLUSIONS, SUGGESTIONS AND RECOMENDATIONS

1. Both open hole and cased hole job is done without any problem. We have good

communication with client and they satisfy with our service.

2. The languange of ELIS Software in ETS 6401 is still chiness, better if change to

English to make easy operation for local engineer.

3. From previous well, one of the computer screen was still have problem with its

colour show, so when do the job, we just use one screen. Better if the broken one

is changed to new one, so next job we can use 2 screens so easy for us to look all

the logging data while do record up.

4. From the begining until job finish, there are no injuries among our crew. We have

to pay attention to this and try to do something with safety first so the risk of

injuries is small every time we do our job.