Geochemical Assessment of the Telisa Shale Gas Reservoir: A Case Study from the South Sumatra Basin, Indonesia

Abdul Haris, Aldo Hutagalung, Agus Riyanto

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The geochemical assessment of a shale gas reservoir in the Telisa Formation in the South Sumatra Basin was carried out to identify the potential shale gas distribution. The objective of this paper is to characterize the core sample by analyzing the total organic carbon (TOC) content, kerogen type and thermal maturity of shale gas layers in terms of vertical resolution based on log data from four well log data. In addition, a seismic interpretation approach including a seismic attribute analysis and an inverted acoustic impedance is explored to spatially distribute the shale gas potential based on TOC values. Geochemical assessment of the Telisa shale gas reservoir revealed that the organic richness of the reservoir is classified as fair to good in quality. Kerogen type in the reservoir is considered a mixture of type II/III (oil/gas prone) to type III (gas prone). In terms of maturity, the Telisa shale gas reservoir is categorized as “in a mature stage”, representing an oil window up to a wet gas window. The prospective reservoir distribution is indicated by a shale lithology characterized by a high acoustic impedance range of 20,000–24,000 ft/s g/cc. In contrast, the organic richness of the Telisa shale reservoir is classified as “of fair quality”, with TOC in the range of 0.75–1 wt%.

Original languageEnglish
Title of host publicationAdvances in Petroleum Engineering and Petroleum Geochemistry - Proceedings of the 1st Springer Conference of the Arabian Journal of Geosciences, CAJG-1 2018
EditorsSantanu Banerjee, Reza Barati, Shirish Patil
PublisherSpringer Nature
Pages175-178
Number of pages4
ISBN (Print)9783030015770
DOIs
Publication statusPublished - 2019
Event1st Springer Conference of the Arabian Journal of Geosciences, CAJG-1 2018 - Hammamet, Tunisia
Duration: 12 Nov 201815 Nov 2018

Publication series

NameAdvances in Science, Technology and Innovation
ISSN (Print)2522-8714
ISSN (Electronic)2522-8722

Conference

Conference1st Springer Conference of the Arabian Journal of Geosciences, CAJG-1 2018
Country/TerritoryTunisia
CityHammamet
Period12/11/1815/11/18

Keywords

  • Geochemical assessment
  • Indonesia
  • Kerogen
  • TOC South Sumatra basin

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