Effects of Diagenesis and Reservoir of the Urho Formation in#br#
Manan Region

doi:10.11885/j.issn.1674-5086.2014.05.29.03

Abstract

Abstract:

Using core observation，casting thin sections identification，scanning electron microscopy（SEM），X-ray diffraction
analysis method with logging and mud logging data，the characteristics of reservoir sandstone，diagenesis and its influence on
reservoir physical property of the Permian Urho Formation in Manan region，Junggar Basin were studied. The results show that
the reservoir rock types in the study area are mainly conglomerate，and a small amount of sandstone；reservoir compositional
maturity and textural maturity are low. At present，the reservoir in the study area is mainly at the middle diagenetic stage B
period，and reservoir experienced complicated diagenesis；the main diagenesis that has a greater influence on the reservoir
property includes compaction，cementation and dissolution；the compaction effect of the reservoirs in the study area is the most
devastating，being root of low porosity and low permeability reservoirs；cementation has two-sided influence on reservoir on
the one hand. On the other hand，cement reduces the reservoir porosity，but also resists the compaction stress to a certain
extent，and provides the material foundation for the later dissolution. The reservoir in the study area is deeply buried，and has
experienced strong compaction and cementation. Therefore，reservoir property is poor，but is improved by the dissolution of
secondary pore，which is an important approach to relatively high quality reservoirs in the study area under the background of
low porosity and low permeability.

Key words: Junggar Basin, Manan region, Permian, Urho Formation, diagenesis, reservoir property

CLC Number:

TE122

CHEN Bo1，2*, YOU Xincai3, ZHANG Yin4, ZHANG Shuncun1, SHI Jian1. Effects of Diagenesis and Reservoir of the Urho Formation in#br# Manan Region[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2014.05.29.03.

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Effects of Diagenesis and Reservoir of the Urho Formation in#br# Manan Region

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