Types and Properties of Dolomite Reservoirs in Carboniferous of East Margin of Caspian Basin

Yanfeng Wang, Shuqin Wang, Jianxin Li, Wenqi Zhao, Weiqiang Li, Changhai Li

2018

Abstract

Taking the Carboniferous KT-I reservoirs in the NT Oilfield in the eastern margin of the Caspian Basin as a case, this paper studies the petrology and physical properties of carbonate reservoirs using core data. The carbonate reservoirs in the study area were deposited in the platform environment. The limestone deposited has experienced multiple stages of diagenetic alteration, among which the dolomitization played an important role in improving the reservoir quality. The dolomites in the study area are diverse in type and are characterized by the development of eight types of dolomites, including foraminifer dolomite, fuzulinid dolomite, bioclastic dolomite, micritic dolomite, micritic-powdery dolomite, powdery dolomite and lime dolomite, and karst breccia dolomite. Different types of dolomite have different characteristics observed on thin sections, and the physical properties vary too. Foraminifera, fuzulinid and bioclastic dolomites belong to grain dolomite with obvious biological characteristics, relatively high permeability and average permeability of more than 100mD. Micrite, micritic-powdery and powdery dolomites are crystalline dolomites which are composed of dolomite crystals arranged closely, and the average permeability is less than 35mD.

Paper Citation

in Harvard Style

Wang Y., Wang S., Li J., Zhao W., Li W. and Li C. (2018). Types and Properties of Dolomite Reservoirs in Carboniferous of East Margin of Caspian Basin.In Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG, ISBN 978-989-758-342-1, pages 319-324. DOI: 10.5220/0007429803190324

in Bibtex Style

@conference{iweg18,
author={Yanfeng Wang and Shuqin Wang and Jianxin Li and Wenqi Zhao and Weiqiang Li and Changhai Li},
title={Types and Properties of Dolomite Reservoirs in Carboniferous of East Margin of Caspian Basin},
booktitle={Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG,},
year={2018},
pages={319-324},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007429803190324},
isbn={978-989-758-342-1},
}

in EndNote Style

TY - CONF

JO - Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG,
TI - Types and Properties of Dolomite Reservoirs in Carboniferous of East Margin of Caspian Basin
SN - 978-989-758-342-1
AU - Wang Y.
AU - Wang S.
AU - Li J.
AU - Zhao W.
AU - Li W.
AU - Li C.
PY - 2018
SP - 319
EP - 324
DO - 10.5220/0007429803190324