Diagenetic Heterogeneity of Deep Sandstones and Its Relationship to Oil Emplacement: A Case Study from the Middle Jurassic Toutunhe Formation in the Fukang Sag, Central Junggar Basin (NW China)
Joint Authors
Cao, Binfeng
Luo, Xiaorong
Zhang, Likuan
Sui, Fenggui
Lin, Huixi
Lei, Yuhong
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-23, 23 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-09-25
Country of Publication
Egypt
No. of Pages
23
Main Subjects
Abstract EN
The Middle Jurassic Toutunhe Formation at depths of approximately 4000–6000 m has increasingly come into focus as a current deep reservoir target in the central Junggar Basin (NW China).
Based on petrography, SEM, stable isotopes, and fluid inclusion analyses, the goals of this study were to investigate the effect of depositional lithofacies on sandstone diagenetic heterogeneity and to examine the relationship between diagenetic evolution and oil charge within a heterogeneous reservoir.
Grain size controls the overall abundance of cement and porosity and reservoir properties through its effect on ductile lithic sand grains and hence on mechanical compaction.
Early diagenetic calcite cement is an exception to this trend.
Ductile lithic-rich, very fine-grained sandstones featured compaction of easily deformed, clay-rich grains, resulting in a very rapid loss of porosity during burial.
In contrast, dissolution and cementation occurred as well as ductile compaction in the fine-grained sandstones.
Two episodes of oil charge occurred in the relatively coarser-grained sandstone lithofacies.
Diagenesis progressed alternately with oil emplacement, and some diagenetic alterations and oil charge occurred simultaneously.
Ductile lithic-rich, highly compacted sandstones and tightly calcite-cemented sandstones can create permeability barriers embedded in permeable reservoir sandstones, probably resulting in heterogeneous flow.
American Psychological Association (APA)
Cao, Binfeng& Luo, Xiaorong& Zhang, Likuan& Sui, Fenggui& Lin, Huixi& Lei, Yuhong. 2017. Diagenetic Heterogeneity of Deep Sandstones and Its Relationship to Oil Emplacement: A Case Study from the Middle Jurassic Toutunhe Formation in the Fukang Sag, Central Junggar Basin (NW China). Geofluids،Vol. 2017, no. 2017, pp.1-23.
https://search.emarefa.net/detail/BIM-1155531
Modern Language Association (MLA)
Cao, Binfeng…[et al.]. Diagenetic Heterogeneity of Deep Sandstones and Its Relationship to Oil Emplacement: A Case Study from the Middle Jurassic Toutunhe Formation in the Fukang Sag, Central Junggar Basin (NW China). Geofluids No. 2017 (2017), pp.1-23.
https://search.emarefa.net/detail/BIM-1155531
American Medical Association (AMA)
Cao, Binfeng& Luo, Xiaorong& Zhang, Likuan& Sui, Fenggui& Lin, Huixi& Lei, Yuhong. Diagenetic Heterogeneity of Deep Sandstones and Its Relationship to Oil Emplacement: A Case Study from the Middle Jurassic Toutunhe Formation in the Fukang Sag, Central Junggar Basin (NW China). Geofluids. 2017. Vol. 2017, no. 2017, pp.1-23.
https://search.emarefa.net/detail/BIM-1155531
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1155531