Exploration of Super-Gravity Rapid Dissolution Method of Polymer for Offshore Oil Repellent
Round 1
Reviewer 1 Report
The article addresses the contradiction formed by the long dissolution time and large dispensing volume of oil repelling polymers in offshore oil fields, which leads to a significant increase in the volume and number of dissolution and maturation tanks in the polymer formulation system, and the limited space and load-bearing capacity of the offshore platform and the small space available for the dispensing system. The introduction of super-gravity technology into the rapid dissolution of polymers substantially reduces the dissolution time of polymers and largely reduces the footprint of the polymer dispensing system on offshore platforms, which is of great importance for the widespread application of polymer drives in offshore oil fields. The mechanism of super-gravity fast dissolution was investigated through mathematical modeling and indoor experiments, and the optimum process conditions for the application of super-gravity fast dissolution technology were selected to provide guidance for further research. However, there are still some shortcomings in the article, which need to be carefully revised by the author. It is recommended to publish after minor revision. Here are the comments and suggestions.
(1) Please add the necessary references to the derivation of the equations in Part III.
(2) The existing forced stretching rapid dissolution device has no details or citations of relevant research references.
(3) “The experimental results showed that the basic dissolution time of hydrophobic associative polymer AP-P4 was shortened from 75 min to 15 min”. Please add the results of the experimental data.
Author Response
(1) Please add the necessary references to the derivation of the equations in Part III.
The necessary references have been cited in the appropriate locations, e.g. 57-67.
(2) The existing forced stretching rapid dissolution device has no details or citations of relevant research references.
The necessary references have been cited in the appropriate locations, e.g. 68.
(3) “The experimental results showed that the basic dissolution time of hydrophobic associative polymer AP-P4 was shortened from 75 min to 15 min”. Please add the results of the experimental data.
Relevant experimental data have been added and the results are shown in Figure 14.
Reviewer 2 Report
The topic of the research is interesting, but the researcher mainly concentrated on the established theoretical aspects.
1. References are only cited in the introduction section. Most of the figures and some tables are already published. Author should cite the reference for the published data and established theory.
2. Navier-Stoke equation and mathematical model is already established. Author should used the model to validate the experimental result.
3. Polymer dissolution is mostly depend on temperature. The effect of temperature on dissolution should incorporate.
4. Along with figure 11, change in viscosity with respect to shear rate should incorporate. For reference you can refer
Hazarika K, Gogoi SB, Kumar A (2022) Polymer flooding and its effects on enhanced oil recovery special reference to Upper Assam Basin Petroleum Research, in press
5. Section 5.3, give justification for line 318 to 325
6. Novelty of the work should mention in the introduction.
Author Response
1. References are only cited in the introduction section. Most of the figures and some tables are already published. Author should cite the reference for the published data and established theory.
The necessary references have been cited in the appropriate locations, e.g. 57-67.
2. Navier-Stoke equation and mathematical model is already established. Author should used the model to validate the experimental result.
In response to the problem that polymer particles are difficult to dissolve leading to the application of polymer drives on offshore platforms, after studying the layered structure of polymer particles, the author conceptualized the use of copper metal foam combined with supergravity technology for rapid dissolution of polymer particles. The physical model of the core components was designed, and the combination of the Navier-Stokes equation and mathematical model verified that the device could generate sufficient kinetic energy to strip the polymer dissolved particles, and would generate a velocity difference to accelerate the polymer dissolution, which theoretically proved that the device could accelerate the polymer dissolution, and on this basis, the hypergravity fast dissolution device was designed and perfected, and through field application, the application of the device in the mine site was proved to be The feasibility and high efficiency of the device in mine application were proved through field application.
3. Polymer dissolution is mostly depend on temperature. The effect of temperature on dissolution should incorporate.
First of all, the reviewer is very familiar with the research area of the manuscript, and it is true that temperature is a very important factor affecting the dissolution rate of polymers, but the main objective of the manuscript is to significantly reduce the dissolution time of hydrophobic associative polymers by mechanical means. The study was conducted at a constant temperature to avoid errors caused by uncertainties, and therefore the effect of temperature on the dissolution time of the polymer was not studied. However, it is undeniable that this is a very good suggestion and will be considered in the subsequent deeper studies to make the research system more perfect.
4. Along with figure 11, change in viscosity with respect to shear rate should incorporate. For reference you can refer
Hazarika K, Gogoi SB, Kumar A (2022) Polymer flooding and its effects on enhanced oil recovery special reference to Upper Assam Basin Petroleum Research, in press
There is no doubt that the variation of polymer solution viscosity with shear rate is an important indicator for evaluating the performance of polymer solutions and is indispensable for the recovery enhancement process of polymer drives in oil fields, which I think is why the reviewer made this comment. However, this study aims to form a polymer fast dissolution device by introducing supergravity technology combined with a forced stretching device, with the ultimate goal of minimizing polymer dissolution time and thus significantly reducing the weight and footprint of the polymer dispensing system on the offshore platform. Although polymer solution viscosity is an important evaluation index for polymer solution performance, the main focus of this study is the degree of polymer dissolution time reduction within an acceptable viscosity loss rate.
5. Section 5.3, give justification for line 318 to 325
From Fig. 10, it can be seen that as the filler pores are smaller, the polymer dissolution time is shorter; the larger the supergravity factor the shorter the polymer dissolution time. When the supergravity factor is greater than the experimental condition of 1031, the degree of polymer dissolution time shortening begins to level off, there are experimental results can be seen again with the increase of supergravity factor, in the same filler pore size, polymer dissolution time basically remains the same, so the use of supergravity fast dissolution device to configure the polymer solution to make the maximum efficiency, then the supergravity factor needs to be greater than 1031. and the experimental condition of supergravity The gravity factor of 1298 is achieved under the condition that the motor speed of the device is 4000RPM, which is the highest limit for both the device and the offshore platform, and too high a speed will increase the danger of construction, and the diameter of the packing ring can be increased to achieve the required range of supergravity factor when the experiment is scaled up in the field. The above results are the results of a single supergravity quick dissolution device, in order to better achieve the effect of rapid dissolution, the forced stretching device was introduced in the subsequent field scaling experiments, so here said the packing pore size according to the actual situation needs to be selected.
6. Novelty of the work should mention in the introduction.
The novelty of the work has been added in lines 54-62.
