Peer Review History

Original SubmissionSeptember 5, 2024
Decision Letter - Ajaya Bhattarai, Editor

PONE-D-24-39005Analysis of key parameters influencing the permeability of cement sheath based on multiphysical fieldsPLOS ONE

Dear Dr. xia,

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Kind regards,

Ajaya Bhattarai

Academic Editor

PLOS ONE

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Additional Editor Comments:

The academic editor would like to see the revised manuscript.

[Note: HTML markup is below. Please do not edit.]

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: I Don't Know

Reviewer #2: N/A

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3. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

Reviewer #2: Yes

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4. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

Reviewer #2: Yes

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5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: Report

Title: Analysis of key parameters influencing the permeability of cement sheath based on multiphysical fields

This paper investigates the seepage characteristics of cement sheaths, considering the flow properties of porous media, by utilising finite element analysis in Comsol Multiphysics software. The model described in the present paper seems to have some novelty in the area of fluid flow through porous media (cement sheaths), which may be applicable in diagnostic testing for any oil or gas well with cement sheath pressure. The manuscript is written well and seems suitable for publication in the esteemed journal, but it requires further minor revision to enhance its overall quality.

The following comments must be addressed before making a decision for this manuscript:

1. After the precise review of the paper, it is found that the basic introduction of cement sheath and other keywords are missing. Please incorporate it in the introduction section.

2. Improve the typos errors in whole manuscript. For now:

“CO2” in line 75; “..” in line 182; “(3.9 \\times 10{-9})” in line 190; Check line 206;

“1.54×10-2” in line 279; “from 1 mm to 1.19×10-1 m3/d” in line 417.

3. There are many abbreviations used in this paper. It is advised to include a table for all abbreviations used in the paper.

4. It is also advised to provide citations for all governing equations and utilised formulas. Also, use proper syntax (comma or full stop) at the end of displayed equations

5. Give the references for the chosen numerical range of parameter values of emerging parameters.

6. Try to exclude access use of indent in each paragraph.

7. For instance, address the following articles in context of flow through porous media:

a) https://doi.org/10.1016/j.chaos.2024.114961

b) https://doi.org/10.1002/zamm.202200047

c) https://doi.org/10.1016/j.chaos.2024.114726

d) https://doi.org/10.1016/j.cjph.2024.01.017

b) https://doi.org/10.1016/j.cjph.2024.03.046

Reviewer #2: This reviewer carefully read the manuscript and found it to be well-written. The study focused on the finite element methods to develop a simulation model for cement sheath seepage. It analyzes parameters influencing seepage flow, cement sheath length, permeability, gap structure, pressure difference, and fluid characteristics. However, before accepting the manuscript, the corresponding author/s should make some minor corrections pointed out in the manuscript, including typo errors.

Also, in some parts of the Results and Discussion section, sufficient discussion with recently published citations is not done; only results are described.

Could be accept after minor corrections.

**********

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Reviewer #1: No

Reviewer #2: Yes: Prof. Dr. Jagadeesh Bhattarai

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Attachments
Attachment
Submitted filename: PONE-D-24-39005-R.pdf
Attachment
Submitted filename: renamed_a2a8f.pdf
Revision 1

Reviewer #1: Report

Title: Analysis of key parameters influencing the permeability of cement sheath based on multiphysical fields

This paper investigates the seepage characteristics of cement sheaths, considering the flow properties of porous media, by utilising finite element analysis in Comsol Multiphysics software. The model described in the present paper seems to have some novelty in the area of fluid flow through porous media (cement sheaths), which may be applicable in diagnostic testing for any oil or gas well with cement sheath pressure. The manuscript is written well and seems suitable for publication in the esteemed journal, but it requires further minor revision to enhance its overall quality.

The following comments must be addressed before making a decision for this manuscript:

1. After the precise review of the paper, it is found that the basic introduction of cement sheath and other keywords are missing. Please incorporate it in the introduction section.

Dear reviewer

We has been added the basic introduction of cement sheath and other keywords.

The cement sheath is a crucial component in oil and gas well construction, filling the annular space between the borehole and casing. Its primary functions are to seal the wellbore, preventing fluids such as oil, gas, and water from migrating along the outside of the casing, protecting the reservoir and surrounding environment, and providing structural support to the wellbore. During drilling and completion operations, cement slurry is injected into the annular space between the borehole and casing, where it hardens to form a cement sheath. This sheath needs to exhibit good mechanical strength, adhesion, and low permeability to effectively withstand various factors like external pressure changes, temperature fluctuations, and chemical corrosion. Additionally, the cement sheath must maintain stable sealing performance throughout the well’s lifespan to prevent any fluid leakage. This stability is vital for protecting the subsurface reservoirs and ensuring long-term well productivity. In petroleum engineering, the permeability of the cement sheath is critically important, as it directly affects the sealing effectiveness of the well. If the cement sheath's permeability increases, fluids may penetrate through it, potentially leading to fluid migration between the reservoir and surrounding formations. This can result in contamination between formations and could even harm the surrounding ecological environment.[1-2].

2. Improve the typos errors in whole manuscript. For now:

“CO2” in line 75; “..” in line 182; “(3.9 \\times 10{-9})” in line 190; Check line 206;

“1.54×10-2” in line 279; “from 1 mm to 1.19×10-1 m3/d” in line 417.

Dear reviewer

I sincerely apologize for our oversight. We have carefully corrected these errors and conducted a thorough review of the entire paper.

3. There are many abbreviations used in this paper. It is advised to include a table for all abbreviations used in the paper.

Dear reviewer

There are only two abbreviations for the full text, we think it is not necessary to establish abbreviations, and please reconsider.

sustained casing pressure (SCP)

casing-cement interface (CCI)

4. It is also advised to provide citations for all governing equations and utilised formulas. Also, use proper syntax (comma or full stop) at the end of displayed equations

Dear reviewer

We have added references and added proper syntax.

5. Give the references for the chosen numerical range of parameter values of emerging parameters.

Dear reviewer

We have given the references for the chosen numerical range of parameter values of emerging parameters.

6. Try to exclude access use of indent in each paragraph.

Dear reviewer

We have reduced paragraph inentation.

7. For instance, address the following articles in context of flow through porous media:

a) https://doi.org/10.1016/j.chaos.2024.114961

b) https://doi.org/10.1002/zamm.202200047

c) https://doi.org/10.1016/j.chaos.2024.114726

d) https://doi.org/10.1016/j.cjph.2024.01.017

b) https://doi.org/10.1016/j.cjph.2024.03.046

Dear reviewer

We have added references to the following article.

a) https://doi.org/10.1016/j.chaos.2024.114961

28.Yadav P K, Yadav N. Impact of heat and mass transfer on the magnetohydrodynamic two-phase flow of couple stress fluids through a porous walled curved channel using Homotopy Analysis Method[J]. Chaos, Solitons & Fractals, 2024, 183: 114961.

b) https://doi.org/10.1002/zamm.202200047

29.Yadav P K, Verma A K. Analysis of two non‐miscible electrically conducting micropolar fluid flow through an inclined porous channel: Influence of magnetic field[J]. ZAMM‐Journal of Applied Mathematics and Mechanics/Zeitschrift für Angewandte Mathematik und Mechanik, 2023, 103(1): e202200047.

Reviewer #2: This reviewer carefully read the manuscript and found it to be well-written. The study focused on the finite element methods to develop a simulation model for cement sheath seepage. It analyzes parameters influencing seepage flow, cement sheath length, permeability, gap structure, pressure difference, and fluid characteristics. However, before accepting the manuscript, the corresponding author/s should make some minor corrections pointed out in the manuscript, including typo errors.

Dear reviewer

We have conducted a thorough review of the entire text, including checks for grammatical errors and typos.

Attachments
Attachment
Submitted filename: Respond to reviewer.doc
Decision Letter - Ajaya Bhattarai, Editor

Analysis of key parameters influencing the permeability of cement sheath based on multiphysical fields

PONE-D-24-39005R1

Dear Dr.chengyu xia,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

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If your institution or institutions have a press office, please notify them about your upcoming paper to help maximize its impact. If they’ll be preparing press materials, please inform our press team as soon as possible -- no later than 48 hours after receiving the formal acceptance. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information, please contact onepress@plos.org.

Kind regards,

Ajaya Bhattarai

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: All comments have been addressed

Reviewer #2: All comments have been addressed

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2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

**********

3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: N/A

**********

4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

Reviewer #2: Yes

**********

5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

Reviewer #2: Yes

**********

6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: Title: Analysis of key parameters influencing the permeability of cement sheath based

on multiphysical fields

Comments:

The authors have improved the manuscript. Now, it can be accepted

Reviewer #2: The revised manuscript incorporated the comments and typo corrections as pointed out in the first comments.

**********

7. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files.

If you choose “no”, your identity will remain anonymous but your review may still be made public.

Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy.

Reviewer #1: Yes: Dr. Pramod Kumar Yadav

Reviewer #2: No

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Formally Accepted
Acceptance Letter - Ajaya Bhattarai, Editor

PONE-D-24-39005R1

PLOS ONE

Dear Dr. xia,

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on behalf of

Dr. Ajaya Bhattarai

Academic Editor

PLOS ONE

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