Ministry of Energy & Mineral Resources of the Republic of Indonesia

POTENTIAL HYDROCARBON OF JAMBI SUB-BASIN IN SOUTH SUMATRA BASIN

CHONG QING, 12 JULY 2018

LOCATION OF STUDY

https://www.mapsofworld.com/indonesia/

the study area is located in most areas of Jambi Province, a small part of which belongs to the province of South Sumatra.

GEOLOGICAL REVIEW

Regional Tectonic Setting of Sumatra (Darman, 2000) Internal Report of PT. PERTAMINA EP Asset 2, 2013)

Target Area

Stratigraphy Regional

Chronostratigraphy of South Sumatera Basin (Ginger-Fielding, 2005)

Target Formation

Oligocene Talang Akar formation (TAF) consists of alternating sandstone with shale, there is a thin coal intercalation. This Talang Akar formation is deposited in a transitional environment (delta to shallow marine). At the lower of this formation develops the the Conglomeratan Sandstone Members. This Conglomeratan Sandstone members are deposited in the braided river system.

OUTCROP DATA

Shale outcrop

Fresh water fish bone fossil

Oil stained sandstone

DATA AVAILABILITY

Working area and distribution of wells Distribution of seismics and wells data

Total well : 28 wells Total seismic line : 360 lines

WELL CORRELATION

WELL CORRELATION

The schematic diagram illustrating the relationship between the stratigraphic sequence units to the rock formations

Paleogeography maps Early Eosen Early Miocene

Early Miocene Early - Middle Miocene

SEISMIC INTERPRETATION

One of key line seismics (90JM-18), this line is located not far from the southeast of Jambi-II area.

SEISMIC INTERPRETATION

A composite seismic line from Azalea well to Plajawan well

SEISMIC INTERPRETATION

A composite seismic line in SW to NE direction

STRUCTURE MAPS

GEOCHEMICAL PARAMETERS

The range values and the dominant values of the geochemical parameters obtained in several wells for each target formation

VSHALE ANALYSIS

One example of TOC log calculation

Abundant shale at Oligocen Talang Akar

Formation

VSHALE AND TOC DISTRIBUTION

Vshale Distribution Map of Upper TAF TOC Distribution Map of Upper TAF

OVERPRESSURE ANALYSIS

Location map of wells identified overpressure zone (SKKMigas - ITB, 2016)

PETROPHYSICAL ANALYSIS

Summary of petrophysical analysis

BRITTLENESS INDEX CALCULATION The result of BI calculations of rock samples obtained from outcrops around the Tigapuluh mountains.

The BI calculation of core data from Azl-1 well.

RESOURCES CALCULATION

Resources Calculation of shale hydrocarbon of Upper Talang Akar Formation

THANK YOU