Pore Structure Characterization and Fractal Characteristics of Tight Limestone Based on Low-Temperature Nitrogen Adsorption and Nuclear Magnetic Resonance
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsThe subject of the research is fair, as well as the interest to the readers. The writing is clear and fluid. The manuscript is well structured.
Some minor questions shall be addressed
The second part of the abstract's last sentence is a bit obvious a may be omitted.
Ln 46 ssize
Ln 48 "They believes" instead of "He believed"
Ln 59 the same as for ln 48
Figure 1: a) and c) do not referred in the text, neither have legend/description label. Please check the label of b) and f) as it contains a typo.
Equation (2) please explain how A is found
Eq.s (5) and (7), please provide the meaning of rho
Figure 5: five samples are missing
Ln 216 Please check whether is Table 1 or Table 2
Ln 218 Please check whether is Figure 5 or 6
Figure 7: please improve the resolution/quality
Ln 255 Please check whether is figure 5c or 9
Ln 258 Figure 8d does not exist
Ln 261 Please check whether is Figure 9a or 10a
Ln 263 Please check whether is Figure 9b or 10b
Figure 10 : a) and b) are not identified
Figure 11: reference in text and discussion are missing
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsIn my opinion, this is an excellent paper providing some important new insights into the development of tight oil resources in China and elsewhere.
One general observation and suggestion is that adding some additional information on the tight oil reservoirs and their development in the introduction will benefit the readers and certainly will expand the appeal of this research to the wider audience.
Below are some additional minor comments and suggestions.
1. Line 36 - I think providing here some extended introduction into the typical lacustrine carbonate tight oil reserves will be an obvious benefit.
Also, some general comparisons (advantages versus possible drawbacks), I am sure, would be also quite welcomed by potential readers.
2. Line 50 - what these factors controlling the difference between porous and texturally tight lithological facies might be? Could the authors please expand on this issue.
3. Lines 55-56 - this is the range of 27-967 nm, not the average. Please modify your wording here.
4. Sub-section 2.1. Experimental samples - please provide some additional information on the experimental samples (cores), e.g. their macrotextures, mineral composition, presence of any heavy minerals (Fe-oxides, etc.)
Type of carbonate (calcite versus dolomote or siderite) will have substantial effects on the development of general (bulk) porosity as well as 3D geometry of nanoscale pore network.
5. Please identify the minerals (and other important features) with indices in SEM images.
Also, what is the scale in Figure 1f.
6. Line 85 - please define micropores, mesopores and macropores for a general reader.
7. I urge the authors to comment. even if very briefly, on possible relationships between the composition (mineralogy) and texture of tight limestone and its porosity and permeability.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
