Organic geochemical investigations of the tertiary units in the Thrace basin (Edirne, Turkey)

Sari A., Savan A. K.

PETROLEUM SCIENCE AND TECHNOLOGY, vol.26, no.3, pp.322-345, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 26 Issue: 3
  • Publication Date: 2008
  • Doi Number: 10.1080/10916460600809485
  • Journal Name: PETROLEUM SCIENCE AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.322-345
  • Keywords: hydrocarbon, kerogen, organic facies, organic matter, source rock, tertiary units, Thrace basin, Turkey
  • Ankara University Affiliated: Yes

Abstract

Units in the Thrace basin with respect to petroleum geology can be divided into two parts: pre-Tertiary and Tertiary deposits. Pre-Tertiary units are generally represented with ophiolites, green schists, and magmatic rocks comprising the basement and upper Cretaceous sediments. The Oligocene Osmancik formation, the upper Eocene-lower Oligocene Mezardere formation, the Eocene Hamitabat, Sogucak, and Ceylan formations encountered in the Minnetler-1A and Karakavak-1 wells drilled in the Thrace basin, are composed of shale, limestone, and sandstone. On the basis of organic geochemical and organic petrographic observations in the Minnetler-1A and Karakavak-1 wells, organic components of the Eocene-Oligocene formations are generally terrestrial organic materials (Type II and Type III kerogens). In the Minnetler-1A and Karakavak-1 wells, organic material contents of units are between 0.08 and 2.48 wt%. On the basis of these values, the Eocene-Oligocene units in both wells show weak to good source rock potentials. According to maturity parameters, Eocene-Oligocene units in the Minnetler-1A and Karakavak-1 wells are at immature and mature oil zone.