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Genesis of the low-permeability reservoir bed of upper Triassic Xujiahe Formation in Xinchang gas field, western Sichuan Depression

Genesis of the low-permeability reservoir bed of upper Triassic Xujiahe Formation in Xinchang gas... The genesis of a reservoir is a result of the combined action of deposition, diagenesis, tectonic reworking, and interaction of rock and fluid and the evolutionary environment. We discuss the genetic and evolution mechanism of a low-permeability reservoir bed of the Xujiahe Formation in the western Sichuan Depression on the basis of the study of diagenesis, diagenetic reservoir facies and the diagenetic evolution sequence. The research indicated that this reservoir bed can be divided into five types of diagenetic reservoir facies, namely strong dissolution, chlorite-lined intergranular pores, compaction and pressure solution, carbonate cementation and secondary quartz increase. There are, however, just two diagenetic reservoir facies which provide low-permeability reservoir beds, namely strong dissolution and chlorite-lined intergranular pores. We also analyzed their diagenetic evolution sequences and the origin of the low-permeability reservoir bed. Besides, it was also indicated that the composition and structure of sandstones, types of sedimentary microfacies, diagenesis history as well as the tectonic reworking in later periods are the main factors controlling the formation of the low-permeability reservoir bed. The abovementioned factors establish the foundation for the forecasting the distribution of high quality reservoir beds. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Petroleum Science Springer Journals

Genesis of the low-permeability reservoir bed of upper Triassic Xujiahe Formation in Xinchang gas field, western Sichuan Depression

Petroleum Science , Volume 5 (3) – Aug 1, 2008

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References (47)

Publisher
Springer Journals
Copyright
Copyright © China University of Petroleum (Beijing) and Springer-Verlag GmbH 2008
Subject
Earth Sciences; Mineral Resources; Industrial Chemistry/Chemical Engineering; Industrial and Production Engineering; Energy Economics
ISSN
1672-5107
eISSN
1995-8226
DOI
10.1007/s12182-008-0035-z
Publisher site
See Article on Publisher Site

Abstract

The genesis of a reservoir is a result of the combined action of deposition, diagenesis, tectonic reworking, and interaction of rock and fluid and the evolutionary environment. We discuss the genetic and evolution mechanism of a low-permeability reservoir bed of the Xujiahe Formation in the western Sichuan Depression on the basis of the study of diagenesis, diagenetic reservoir facies and the diagenetic evolution sequence. The research indicated that this reservoir bed can be divided into five types of diagenetic reservoir facies, namely strong dissolution, chlorite-lined intergranular pores, compaction and pressure solution, carbonate cementation and secondary quartz increase. There are, however, just two diagenetic reservoir facies which provide low-permeability reservoir beds, namely strong dissolution and chlorite-lined intergranular pores. We also analyzed their diagenetic evolution sequences and the origin of the low-permeability reservoir bed. Besides, it was also indicated that the composition and structure of sandstones, types of sedimentary microfacies, diagenesis history as well as the tectonic reworking in later periods are the main factors controlling the formation of the low-permeability reservoir bed. The abovementioned factors establish the foundation for the forecasting the distribution of high quality reservoir beds.

Journal

Petroleum ScienceSpringer Journals

Published: Aug 1, 2008

Keywords: Low-permeability reservoir; diagenetic reservoir facies; Xujiahe Formation; upper Triassic; Xinchang gas field; western Sichuan Depression

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