WELL-TECH
COMPLETION REPORT
OPEN HOLE LOGGING
Well Name : BTJ-208
Report By
HENDRIK JEFRI SAHERTIAN
June-22-2013
WellTech – PT.COSL INDO
WELL-TECH
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.