Field Trip of Sediment Clastic at Mahakam Delta, East Kalimantan

American Association of Petroleum Geologist

An International Geological Organization University of Padjadjaran Student Chapter

UNPAD Student Chapter of AAPG, Faculty of Geology, University of Padjadjaran. Jl. Raya Bandung – Sumedang Km. 21, Jatinangor 45363. Phone: (022) 779 – 6545.

E-mail : [email protected] or [email protected] ______________________________________________________________________________

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E-mail : [email protected] or [email protected]

The Modern & Ancient Mahakam Delta

Field Trip 2009

“Field Trip of Sediment Clastic at Mahakan Delta, East

Kalimantan”

American Association of Petroleum Geologist University of Padjadjaran Student Chapter

2009





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PREFACE Padjadjaran University Student Chapter of AAPG established a field trip with

title “The Modern and Ancient Mahakam Delta” by Mr. Andang Bachtiar from ETTI.

This activity was held on August 6-9th 2009, in Balikpapan and Samarinda.

AGENDA

This activity was held on August 6-9th 2009. Following was the schedule of the

activity:

Day – 1

Thursday, August 06, 2009

Balikpapan

10.30 – 11.30 Move to Total Corelab

11.30 – Finish Total Corelab

Day – 2

Friday, August 07, 2009

Delta Mahakam (Southern Lobe)

(Tide Table 15:00 0.7 meter)

06.00 – 07.00 Breakfast

07.00 – 07.30 Move to Mahakam delta (jetty Samarinda)

07.30 – 08.30 Move to Stop – 1

08.30 – 09.30 Stop – 1, Sanga – Sanga head of passes

09.30 – 10.00 Move to Stop – 2

10.00 – 11.00 Stop – 2, Muara Bayur

11.00 – 11.30 Move to Stop – 3





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11.30 – 13.30 Stop – 3, Pulau Datu (Ishoma)

13.30 – 14.30 Move to Stop – 4

14.30 – 15.30 Stop – 4, Muara Bujit

15.30 – 17.30 Back to Hotel and overnight in Samarinda

17.30 – 19.00 Free Time

Day – 3

Saturday, August 08, 2009

Around Samarinda – Balikpapan

07.00 – 08.00 Breakfast and check out from hotel

08.00 – 08.30 Move to Stop – 1

08.30 – 10.30 Stop – 1, Batu Putih

10.30 – 11.30 Move to Stop – 2

11.30 – 12.30 Stop – 2, By Pass Palaran

12.30 – 13.00 Lunch (Ishoma)

13.00 – 14.30 Move to Stop – 3

14.30 – 15.30 Stop – 3, Crevasse Splay (Km 46.5)

15.30 – 17.30 Move to Balikpapan and Check in hotel

Day - 3

Sunday, August 09 , 2009

Around Balikpapan

06.00 – 07.00 Breakfast

07.00 – 07.30 Move to stop- 1

07.30 – 08.00 Stop – 1, Matilda Well

08.00 – 08.30 Move to stop- 2





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08.30 – 09.00 Stop – 2, Gn. Pancur Oil Seep

09.00 – 09.30 Move to stop- 3

09.30 – 10.00 Stop – 3 Ruko A. Yani

10.00 – 10.30 Move to stop- 4

10.30 – 11.00 Stop – 4, Gn Malang Gas Station

11.00 – 11.15 Back to Hotel

11.15 – 12.15 Lunch

12.15 – 14.15 Clossing ceremony

END OF FIELD TRIP

ACTIVITY SUMMARY

DAY 1, CORE ROOM AT TOTAL

In August 6th, 2009 for the first time UNPAD SC AAPG visited to TOTAL core

room in Balikpapan. Mr. Wanasherpa as an assistance from TOTAL gave a short lecture

with theme “Basic Of Core Description”. He told that a good core description assist in

interpretation depositional environment, wire line log calibration, and stratigraphy well

correlation. Description core need type of litology include colour and grain size, type of

litology extended include coarsening upward or thickening upward, contact each

litology, thick of sediment, sediment structure, and content of carbonate cementation,

organic component, skeletal dispersion, or pyrite and siderite mineral. Beside that core

plug analysis gave information about porosity, permeability, and fluid saturation. After

that, he taught about explanation for basic study of core such as facies description,

facies classification (siquen analysis), sedimentation analysis, and the last but not the

least depositional environment interpretation.





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Finished at presentation room, participant moved to Core Lab room not far from

TOTAL office showed core have been slab from well TOTAL field. Mr. Andang

Bachtiar as a speaker explains how we could see sediment structure from core to

fieldtrip participants. We had to cleaning core surface to see first, sediment structures

such as cross bed, parallel lamination, dewatering, bioturbation, and massive etc.

Second, sediment structures pursuant to formed energy from lowest to highest are

massive, lenticular, wavy, flaser, ripple, and cross bed. The last, differences of sharp

contact and gradational contact.

Core samples at Total’s Core Room

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DAY 2, STOP-2 MUARA BAYUR

Muara Bayur is the second stop after Maryam River. This located is around 17

km from stop in SE direction. Depostional environment of this area is Upper Delta

Plain,it’s distinguish by appearance nipah vegetation and begun low salinity water to

fresh water. Like stop 1, we did grab sampling to knowing different characteristic of

lithology. This area is part of distributary channel system which fluvial processed

dominantly. We will try to measure the depth of the river with sonar tool to saw

morpholgy the river.

Students listening Mr. Andang explanation on the sea truck

DAY 2, STOP-3 DATU ISLAND

In the stop 3, we went to Datu Island. The located of Datu Island in the sourthern part

of Modern Mahakam Delta. We did coring to know how to mechanism sedimentary

structure. The most litho facies that occured in this area are cross bedding sand,

heterolithic sand, horizontal laminated sand. Beside that in modern outcrop we can

founded mega-ripple and ripple mark formed by tide and wave. This mid-channel bar





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is part of distributary channel system estuary that was developed because the influence

of fluvial. So in depositional environment Datu Island is Lower Delta Plain.

.

Coring Process

DAY 2, STOP-4 MUARA BUJIT

Our last stop in Muara Bujit. We visited Muara bujit because we can observe

some of distributary mouth bar sediments in this area that is influenced by tidal

processes. At Muara bujit, we did coring in this location. Based on an observation of

sediment in surface, we can see the condition of environment such as energy and speed

of sedimentation. And finally Muara Bujit entering into Delta Front Sytem.





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Comparing core sample from Datu Island and Muara Bujit

DAY 3, STOP-1 BATU PUTIH LIMESTONE

The location of Batu Putih Limestone is at Samarinda city. Geologically,Batu

Putih is the highest place at the anticlinorium Samarinda and these area are the hanging

wall from thurst fault that made Batu Putih well exposed until now.

Limestone in Mahakam Delta, include Batu Putih, were formed during

lower miocene. At present day, the limestone spread in the notrh side of mahakam river

with NNE-SSW direction, but in the south side of mahakam river, there were no

limestone was found. This indicate that at lower miocene time, Mahakam Delta was

located near these Limestone. According to Mr. Andang Bachtiar said, there were found





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hallimeda in limestone and the halllimeda could only existed at the inactive lobe of

Mahakam Delta

Batu Putih Limestone

DAY 3, STOP-2 BY PASS PALARAN

After visited the Batu putih Limestone, we went to outcrops of by pass Palaran

located along high-way connecting from Samarinda to Tenggarong. The outcrop is 5

km from Samarinda. Geologically, the outcrops have strike direction NE-SW which

dipping to SE direction. Geological map suggests that the outcrops belongs to Pulau

Balang Formation or equivalent to Loa Duri Formation (Chamber, 1992).

These Outcrops are exposed 200 meters width and 15 meters height. The

outcrops consist of interbedded sandstone and shale that intercalated by thin layers of

coal or coaly shale. Sedimentary structures such cross-bedding and parallel laminations

are found in 6 meter sand body layer of this outcrop.





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In one of the interbedded sandstone and shale layers, we found the burrows in

sandstone layer beneath shale. According to Mr. Andang Bachtiar said, the sedimentary

structures made by the animal that came from the unconsolidated shale layer.

These are suggesting influenced marine environment from marginal marine to

inner shelf paleobathymetri or probably associate with lower delta front - prodelta

environment. However, at the upper most part, it is containing small agglutinated

forams that indicating brackish water depositional environment.

Outcrop at by pass Palaran





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DAY 3 STOP 3,

KM 46.50 BALIKPAPAN-SAMARINDA BY PASS ROAD CREVASSE SPLAY

These outcrop is the last outcrop in third day and was located at highway

connection Balikpapan and Samarinda at KM 46.5. It was a low angle slope built up by

predominantly mudstone of flood-plain deposits, interbedded with coals and minor

sandstone lenses. This outcrop is the “famous” crevasse splay typical example “found”

by the late George Allen to illustrate the ancient Mahakam Delta that was different from

the modern one, because no crevasse splays (and levees) were found in the modern

Mahakam Delta setting.

The sandstone bed has lenticular form sandwiched by 2 coal seams which merge

into one single seam at the both ends of the lenses. The sandstone is fine to medium

grained, muddy, carbonaceous laminae, with climbing ripples and small scale slump

structures. A vague coarsening upward characteristic is noted, but in general it shows a

blocky appearance. The longitudinal sandstone lense has a dimension of a maximum 1

meter thick and 50 meters length.

Taking picture together at Km 46, Balikpapan-Samarinda





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DAY 4, STOP-1 MATHILDA B-1 WELL

Currently, the location of the Mathilda B-1 Well is at Semayang Seaport and

Pertamina refinery. This well is one of the oil and gas exploration well that was drilled

in Kutai Basin and the first field in Balikpapan area. This well was drilled at 1897 and its

TD was 222 meters. Its production was 184 barrels/day, then plug and abandoned at

1903 with cummulative production was 68375 barrels.

The position of Mathilda well in crest from Antiklin Klandasa, so in the

past this location very prospect to accumulation hydricarbon.

Mathilda Well





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DAY 4, STOP-2 GUNUNG PANCUR OIL SEEP

The outcrop is located in a river (valley) on the east side of Jl. Batam-1 Gunung

Pancur area, Balikpapan. It is in the Mentawir Formation, Balikpapan Group (Marks, et

al., 1982) or in the Wain Basin nomenclature: the Klandasan Formation. Mr . Andang

said that correlated to Bongkaran-1 stratigraphy terminology.

The Klandasan sandstone developed in this location shows thick beddings of fine

grained to medium grained sandstone with some indications of cross bedding. In the

subsurface, this sandstone may develop as thick as 3000 feet (920 m) with only minor

shale interbeds.

It has been long time debated whether the outcropping Klandasan (Mentawir)

sandstone has marine environment indication or not, because of its well-sorted, clean,

and thick appearances. Since there are no definite marine indications (fossils,

sedimentary structures), the section has been re-interpreted using well correlations and

seismic to be a fluvial deposition in a braided river complex.

Oil seeps at Gunung Pancur





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DAY 4, STOP-3 RUKO A. YANI OUTCROP

The outcrop is located behind Ruko complex on Jl. Ahmad Yani (Karang Jati).

Structurally, it is on the northern flank of the Klandasan anticline. The outcrop exposed

a sixteen-meter of mudstone section overlying the typical Klandasan (Mentawir

Formation) sand. The mudstone is from dark gray to light gray kaolinitic clays with

interbedding of oxidized siltstone. Rippled bedding surfaces are found to be mottled by

roots and burrows. Right at the mudstone contact with the underlying sandstone, an

oxidized rippled bedding surface is developed. Burrows were also found on the upper

part of the sand. On the other side of the anticlinal flank, this section is correlatable with

limestone bed (in Kampung Damai area).

Mr. Andang Bachtiar explain about the outcrop





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DAY 4, STOP-4 GUNUNG MALANG GAS STATION OUTCROP

The outcrop in this location used to be an open quarry area before it is crowded

by buildings and facilities (gas station, workshop, offices). The cliff of this outcrop is up

to 30 meters high and 70 meters wide. The sand body geometry which exhibit lenticular

and sometimes sigmoid shapes is very pronounced in this outcrop. The finer grain size

sections usually show clay drapes, and clay doublets. Burrows are rarely found in this

outcrop. The overall sand characteristics are coarsening upward. Participants are urged

to differentiate the tidal versus fluvial processes in this outcrop and also to look at the

vertical trend within the individual beds.

Observing the outcrop





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GEOLOGICAL STUDENT ORGANIZATION &

AMERICAN ASSOCIATION OF PETROLEUM GEOLOGIST

University of Padjadjaran

2009

One Day Course “BASEMENT FRACTURE”





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PREFACE

UNPAD Student Chapter of AAPG and HMG UNPAD was established a One

Day Course with theme “Basement Fracture” by Mr. Joel Guttormsen (Conoco Philips). This

activity was held on August 3rd, 2009, in Faculty of Geology, University of Padjadjaran..

AGENDA

This activity was held on August 3rd, 2009, following is the schedule of the activity:

Segmen Place Seg. Detail Event Facilitator

09.00 – 10.00

Auditorium

Registration of Participant Host

10.00 – 10.05 Opening Ceremony Host

10.05 – 12.00 lecture Mr. Joel Guttormsen

12.00 – 13.30 Break time Consumption

13.30 – 15.30 lecture Mr. Joel Guttormsen

15.30 – 15.40 Giving a momento Activity Leader

15.30 – 15.45 Closing and take a picture Host

ACTIVITY SUMMARY

UNPAD Student Chapter of AAPG and HMG UNPAD had a great course about

“Basement Fracture”. It’s so important for us. The lecturers gave us a huge quality

courses. They gave us a basic definition of fracture that could be the basic science for us

to join the oil industry world as a good geoscientist. In this One Day Course, the

lecturers presented the excellent and interested topic.





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The Distinguished Lecture was successfully conducted; about 63 peoples attend

in this lecture. Most of all participant interested & satisfied with explanation about

Basement Fracture.

Mr. Joel Guttormsen taught us Basement Fracture

The lecture presented by Mr. Joel Guttormsen. First of all, he showed us about

definition of fracture, and then he explained that there are so many kind o fracture that

can we find.





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Participants was enthusiasticly listening Mr. Joel Guttormsen’s explaination

At 12.00 we take a break. After break and lunch, we continue the lecture. He

explained the development of the fracture, just like about fracture reservoir. Reservoirs

in fractured basements, where the oil and gas in place may be held within an extensive

fracture network on a variety of different scales rather than within the matrix porosity

of the formation, present challenging problems to the petrophysicist and reservoir

engineer. Fractured reservoirs are much more difficult and expensive to evaluate than

the more conventional reservoirs





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Mr. Joel Guttormsen received a momento from activity leader

Before he finished his lecture, we give him a memento. And then we take a

photograph together with the participants.





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Took a picture with participants, First Dean of Geology University of Padjadjaran, and Mr. Joel Guttormsen





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GUEST LECTURE “GEOSTEERING”

GEOLOGICAL STUDENT ORGANIZATION &

AMERICAN ASSOCIATION OF PETROLEUM GEOLOGIST

University of Padjadjaran

2009





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PREFACE UNPAD Student Chapter of AAPG and HMG UNPAD was established a course

by Mr. Sanggam Hutabarat with theme “Introduction To Geosteering” on August 1st, 2009,

in Faculty of Geology, University of Padjadjaran

AGENDA

This activity was held on August 1st, 2009, following is the schedule of the activity:

Saturday,August 1st2009

Segmen Place Event Facilitator

08.00 – 09.00

Meeting room,

PURISKA Unpad

Registration of Participant Crew

09.00 – 09.15 Opening Ceremony Host

09.15 – 12.00 Course Mr. Sanggam Hutabarat

12.00 – 13.00 Break time Consumption

13.00 – 16.00 Course Mr. Sanggam Hutabarat

16.00 – 16.05 Giving a momento Activity Leader

16.05 – 16.15 Closing Host

ACTIVITY SUMMARY

UNPAD Student Chapter of AAPG and HMG UNPAD had a course about

“Introduction to Geosteering”. It’s so interesting for us. The lecturers gave us a superb

quality courses. They gave us a basic definition of fracture that could be the basic





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science for us to join the oil industry world as a good geoscientist. In this One Day

Course, the lecturers presented the excellent and interested topic.

The Distinguished Lecture was successfully conducted, about 45 peoples attend

in this lecture.. Most of all participant interested & satisfied with explanation about

Basement Fracture.

The lecture presenter by Mr. Sanggam Hutabarat. For the introduction, he

showed us about the petroleum industry, how it still important for many years later,

and how the new technology makes many exploration and extraction were impossible

become possible now. And one of the technologies is the geosteering itself. He

explained the geosteering as an act of adjusting the borehole position to make a

directional drilling that combined with information of subsurface geological model. The

goal is to hit geological target within prescribed deviations errors.

Mr. Sanggam Hutabarat taught us about Geosteering





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Participants was enthusiasticly listening Mr. Sanggam Hutabarat’s explaination

He also explained that geologically, the geosteering method is actually difficult.

The drilling cost is higher, the drilling difficulty is higher, and the stratigraphy

information given is confusing, and other disadvantages. A decision to make directional

drilling must be well considerated. If the geosteering exactly planned, we might recover

more oil than confessional drilling.





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Mr. Sanggam Hutabarat received a momento from activity leader

Also in the middle of lecture at 12.00, we had a break and launch. After he

finished his lecture, we gave him a memento. Then we had a picture with him for

documentation.





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Took a picture with Mr. Sanggam Hutabarat

Documents

Field Trip of Sediment Clastic at Mahakam Delta, East Kalimantan