Report on the article on the topic «Effect of Well Completion Configuration and Tubing Sizes on Well Performance» The article entitled "The effect of the configuration of the well completion and the size of the tubing on well performance" was written on 10/13/2023 and published in the Journal of Earth Sciences and Technology. The author of the article examines the issue of the influence of various types of completion and sizes of tubing during mining. The article consists of 4 sections and subsections, namely: introduction, methodology, results and discussion, conclusion. The hypothesis of the study is that proper completion helps optimize production by minimizing pressure drop and predicting the longest possible service life. A stationary simulator (PIPESIM®) was used as research methods. The author built and completed a borehole model, including both the casing and the shank, taking into account the flow through the tubing and annulus. The article also conducts an experiment with measuring the sensitivity of various sizes of tubing for this type of completion and flow configuration, depending on the performance of the well. As a result, resizing tubing for optimization should only be considered when completing cased wells and a casing with a pipe flow configuration, since both completion methods - casing and casing using tubing and annular flow - give almost identical results when resizing pipes. The main research is devoted to the analysis of the influence of the size of the tubing on the well performance when filling a cased well with a flow of tubing. The author provides calculations of the flow rate of liquid in the reservoir and downhole pressure in the well when filling the cased well, the flow rate of tubing and flow in the annular space. The following are statistical data on the effect of the size of the tubing on well performance when filling a cased well with a flow of tubing, as well as the effect of the size of the tubing on well performance at the completion of the casing, the configuration of the tubing and the annular flow. Finally, data on the percentage of performance increase with a different flow configuration is provided. At the end of the paper the author concludes (draws the conclusions) that: • For a given completion method (cased hole and liner completion), both production mode (flow configuration) and tubing sizes has an effect on the well performance. • A comparison of cased hole and liner completion methods for tubing flow shows a percentage increase in production rate. • Cased hole and liner completion methods for tubing and annular flow shows a minimal percentage increase in production rate. • Changing the tubing sizes gave optimum well performance for cased hole and liner completion for tubing flow with annular isolation.
