Tracking Eocene Source Kitchens
Source rocks, migration pathways and trapping structures are now revealed with broadband GeoStreamer data and offer both new exploration plays and near-field opportunities.

The Location
Location
North Madura and South Makassar
Survey Year
2017 & 2018
Survey Type
3D GeoStreamer
Configuration
10 streamers, 7 or 8 km long
Source Configuration
Triple source
Survey Size
2 558 & 4 129 sq. km
TGS acquired five MC3D surveys spanning the Indonesian archipelago. Two of these surveys, North Madura and South Makassar are located in the highly prospective Tertiary basins of the southeast Sundaland margin. Modern broadband GeoStreamer data provide a renewed perspective and reveal fresh geological insights and exploration plays.

The Challenge
The Challenge
Exploration in the area has focused on shallow carbonate pinnacle reefs (yellow circle). Imaging below these carbonate highs has been difficult and legacy data provided extremely poor resolution of the deeper stratigraphy and structures. The challenge is to understand deeper targets and play fairways throughout the entire Tertiary sequence.


The Solution
Data
GeoStreamer 3D
Ultra Efficient
Bin size 12.5 x 12.5 m
Processing
Full 3D demultiple
Velocity Model Building
FWI and reflection tomography
Migration
TTI Kirchhoff PSDM and SWIM
Robust imaging of the deeper geology has historically been challenging but now GeoStreamer data is resolving potential Eocene plays. Imaging artifacts introduced by carbonate platforms, where the slow velocities of deep channel incisions are in strong contrast with the fast carbonate velocity, are mitigated by generating accurate velocity models using FWI. Legacy data in the area has been unsuccessful in imaging deeper than the Kujung level, but applying advanced imaging technologies such as FWI and SWIM provides images with greater bandwidth and deeper resolution.
Eocene Source Rock Better Resolved on 3D Data


Accurate Velocity Model Building Minimizes Structural Distortions



The Results
New Broadband Datasets Reveal Novel Highly Prospective Leads
These new broadband datasets successfully image the entire Tertiary section and reveal a number of new highly prospective leads. The seismic data now exposes all elements of the petroleum system, including the Eocene source rocks, and significantly derisks the reservoir, trap and seal presence.

Speak to Our Experts
Get in touch with a TGS representative today to book your demo and learn more about how TGS solutions can support your energy needs.