Production Calculation Model of Thermal Recovery after Hydraulic Fracturing and Packing in Tight Reservoir

Round 1

Reviewer 1 Report

The formula derivation part of the writing and typesetting part are messy, should be based on clear thinking typesetting, highlighting the description of important parts. The research object of this paper is the calculation of thermal recovery output after fracturing and filling in tight reservoirs. The previous introduction of relevant fields should be more comprehensive and sufficient, and the characteristics of the model established in this paper should be described in detail to highlight the research value of this paper. The results are very important for natural gas hydrate. The paper can be accpeted in this form. However, it can be improve in the writing skills.

Author Response

I have modified and improved this article. See the red text for details.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments:

I recognize that scientific writing in a non-native language is a tremendously hard task, but the quality of this manuscript is below any acceptable threshold. The incorrect or inappropriate word choice allows for too much ambiguity in the interpretation. For instance, when discussing the model development, the porous media is described from line 61 as a - “single porosity filtration system”. There is no logical interpretation of this phrase.

Line 77 – what is the heating zone?

Line 79 and 82 – How can you ignore heat conduction in one direction, but then say it dominates results?

Section 2.1.1 – this presentation of variables quite difficult to follow and likely not formatted correctly for the journal.

Line 144 – I think “steam dryness of down hole” is steam quality?

Line 216 – How are do fractures have a lower porosity?

Line 218 – How do long flow pathways such as fractures not increase the radius of heating is the surface area is increased?

Line 228 – If the change in heating is so minimal, how is 300% more oil heated through the well treatment?

References:

This reference list does not seem sufficient in addressing previous work on steam flooding.

Author Response

Thanks a lot! According to the comments of the reviewers, first, I reorganize the second chapter of this paper. And second, I corrected professional words, such as steam dryness is steam quality. See the red text for details.

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Reviewer Comments:

I am pleasantly surprised by the improvement in the comprehension of the manuscript following your revisions. There are still a few lingering mistakes in grammar, but this does not impact the presentation of results.

Line 15  - Remove: Fracturing

Line 41 -  reservoirs

Line 50 – Fractures

Line 62 – A heat loss..

Line 256 – Is this based on the asymptotic behavior of the curves?

Can you calculate the thermal mass of the proppant to account for the loss in reservoir heating?

Line 274 - Change “thermal recovery” to “the heated reservoir volume”

Line 282 - Change “thermal recovery” to “the heated reservoir volume”

Author Response

Thanks a lot for your good work to find reviewers to help improve our manuscript. We have again revised our manuscript according to reviewers’ queries/comments and hope that our paper will meet with the requirements for publication this time!

Query1: I am pleasantly surprised by the improvement in the comprehension of the manuscript following your revisions. There are still a few lingering mistakes in grammar, but this does not impact the presentation of results.

Answer: I fully agree with your comments. See the red text for details.

Query2: Is this based on the asymptotic behavior of the curves? Can you calculate the thermal mass of the proppant to account for the loss in reservoir heating?

Answer: This is the result of calculation. Specifically:

Combined with the following two heating area calculation formulas.

 

 

Author Response File: Author Response.pdf