Geomechanical and Petrophysical Assessment of the Lower Turonian Tight Carbonates, Southeastern Constantine Basin, Algeria: Implications for Unconventional Reservoir Development and Fracture Reactivation Potential
In this study, we assessed the unconventional reservoir characteristics of the Lower Turonian carbonates from the southeastern Constantine Basin. We integrated petrography, petrophysical, and rock-mechanical assessments to infer formation properties and unconventional reservoir development strategie...
Published in: | Energies |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2022
|
Subjects: | |
Online Access: | https://doi.org/10.3390/en15217901 https://doaj.org/article/5f00eec1be6543de9cfd4784a4e3cb16 |
id |
ftdoajarticles:oai:doaj.org/article:5f00eec1be6543de9cfd4784a4e3cb16 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:5f00eec1be6543de9cfd4784a4e3cb16 2023-05-15T18:00:58+02:00 Geomechanical and Petrophysical Assessment of the Lower Turonian Tight Carbonates, Southeastern Constantine Basin, Algeria: Implications for Unconventional Reservoir Development and Fracture Reactivation Potential Rafik Baouche Souvik Sen Ahmed E. Radwan 2022-10-01T00:00:00Z https://doi.org/10.3390/en15217901 https://doaj.org/article/5f00eec1be6543de9cfd4784a4e3cb16 EN eng MDPI AG https://www.mdpi.com/1996-1073/15/21/7901 https://doaj.org/toc/1996-1073 doi:10.3390/en15217901 1996-1073 https://doaj.org/article/5f00eec1be6543de9cfd4784a4e3cb16 Energies, Vol 15, Iss 7901, p 7901 (2022) geomechanical characterization in situ stress Lower Turonian unconventional reservoir tight carbonates fracture reactivation Technology T article 2022 ftdoajarticles https://doi.org/10.3390/en15217901 2022-12-30T23:18:42Z In this study, we assessed the unconventional reservoir characteristics of the Lower Turonian carbonates from the southeastern Constantine Basin. We integrated petrography, petrophysical, and rock-mechanical assessments to infer formation properties and unconventional reservoir development strategies. The studied fossiliferous argillaceous limestones are rich in planktonic foraminifera, deposited in a calm and low energy depositional condition, i.e., deep marine basinal environment. Routine core analysis exhibits very poor porosity (mostly < 5%) and permeability (<0.1 mD), implying the dominance of nano and microporosity. Micritization and calcite cementation are inferred as the major reservoir quality-destroying diagenetic factors. Based on the wireline log-based elastic properties, the upper part of the studied interval exhibits higher brittleness (BI > 0.48) and fracability (FI > 0.5) indices compared to the lower interval. Borehole breakouts indicate ~N-S SHmax orientation and a normal to strike-slip transitional stress state has been constrained based on a geomechanical assessment. We analyzed safe wellbore trajectory and minimum mud weight requirements to ensure stability in the deviated and horizontal wells required for field development. At the present stress state, none of the fracture orientations are critically stressed. We inferred the fracture reactivation potential during hydraulic stimulation required to bring the tight Turonian limestones into production. Additional pore pressure build-up required to reactivate optimally oriented natural fractures has also been inferred to ensure success of hydraulic fracturing. Article in Journal/Newspaper Planktonic foraminifera Directory of Open Access Journals: DOAJ Articles Energies 15 21 7901 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
geomechanical characterization in situ stress Lower Turonian unconventional reservoir tight carbonates fracture reactivation Technology T |
spellingShingle |
geomechanical characterization in situ stress Lower Turonian unconventional reservoir tight carbonates fracture reactivation Technology T Rafik Baouche Souvik Sen Ahmed E. Radwan Geomechanical and Petrophysical Assessment of the Lower Turonian Tight Carbonates, Southeastern Constantine Basin, Algeria: Implications for Unconventional Reservoir Development and Fracture Reactivation Potential |
topic_facet |
geomechanical characterization in situ stress Lower Turonian unconventional reservoir tight carbonates fracture reactivation Technology T |
description |
In this study, we assessed the unconventional reservoir characteristics of the Lower Turonian carbonates from the southeastern Constantine Basin. We integrated petrography, petrophysical, and rock-mechanical assessments to infer formation properties and unconventional reservoir development strategies. The studied fossiliferous argillaceous limestones are rich in planktonic foraminifera, deposited in a calm and low energy depositional condition, i.e., deep marine basinal environment. Routine core analysis exhibits very poor porosity (mostly < 5%) and permeability (<0.1 mD), implying the dominance of nano and microporosity. Micritization and calcite cementation are inferred as the major reservoir quality-destroying diagenetic factors. Based on the wireline log-based elastic properties, the upper part of the studied interval exhibits higher brittleness (BI > 0.48) and fracability (FI > 0.5) indices compared to the lower interval. Borehole breakouts indicate ~N-S SHmax orientation and a normal to strike-slip transitional stress state has been constrained based on a geomechanical assessment. We analyzed safe wellbore trajectory and minimum mud weight requirements to ensure stability in the deviated and horizontal wells required for field development. At the present stress state, none of the fracture orientations are critically stressed. We inferred the fracture reactivation potential during hydraulic stimulation required to bring the tight Turonian limestones into production. Additional pore pressure build-up required to reactivate optimally oriented natural fractures has also been inferred to ensure success of hydraulic fracturing. |
format |
Article in Journal/Newspaper |
author |
Rafik Baouche Souvik Sen Ahmed E. Radwan |
author_facet |
Rafik Baouche Souvik Sen Ahmed E. Radwan |
author_sort |
Rafik Baouche |
title |
Geomechanical and Petrophysical Assessment of the Lower Turonian Tight Carbonates, Southeastern Constantine Basin, Algeria: Implications for Unconventional Reservoir Development and Fracture Reactivation Potential |
title_short |
Geomechanical and Petrophysical Assessment of the Lower Turonian Tight Carbonates, Southeastern Constantine Basin, Algeria: Implications for Unconventional Reservoir Development and Fracture Reactivation Potential |
title_full |
Geomechanical and Petrophysical Assessment of the Lower Turonian Tight Carbonates, Southeastern Constantine Basin, Algeria: Implications for Unconventional Reservoir Development and Fracture Reactivation Potential |
title_fullStr |
Geomechanical and Petrophysical Assessment of the Lower Turonian Tight Carbonates, Southeastern Constantine Basin, Algeria: Implications for Unconventional Reservoir Development and Fracture Reactivation Potential |
title_full_unstemmed |
Geomechanical and Petrophysical Assessment of the Lower Turonian Tight Carbonates, Southeastern Constantine Basin, Algeria: Implications for Unconventional Reservoir Development and Fracture Reactivation Potential |
title_sort |
geomechanical and petrophysical assessment of the lower turonian tight carbonates, southeastern constantine basin, algeria: implications for unconventional reservoir development and fracture reactivation potential |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/en15217901 https://doaj.org/article/5f00eec1be6543de9cfd4784a4e3cb16 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Energies, Vol 15, Iss 7901, p 7901 (2022) |
op_relation |
https://www.mdpi.com/1996-1073/15/21/7901 https://doaj.org/toc/1996-1073 doi:10.3390/en15217901 1996-1073 https://doaj.org/article/5f00eec1be6543de9cfd4784a4e3cb16 |
op_doi |
https://doi.org/10.3390/en15217901 |
container_title |
Energies |
container_volume |
15 |
container_issue |
21 |
container_start_page |
7901 |
_version_ |
1766170269516300288 |