{"title":"Comprehensive pore structure characterization and permeability prediction of carbonate reservoirs using high-pressure mercury intrusion and X-ray CT","authors":"","doi":"10.1007/s13146-024-00923-y","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>The heterogeneity of carbonate reservoirs, influenced by sedimentary environments and diagenetic processes, leads to the development of microfractures and vugs, posing significant challenges for reservoir evaluation. This study investigates the complex pore structures of Y-type carbonate reservoirs in the Middle East. We assess the performance of classical permeability prediction models and introduce a novel approach that incorporates a bimodal pore size distribution (PSD) derived from High-Pressure Mercury Injection (HPMI) measurements, accounting for gas slip flow effects. Our results, based on CT imaging, categorize carbonate rock core samples into matrix, fracture, and vuggy. Matrix-type carbonate rocks show a strong correlation between permeability and pore-throat radius, while fracture-type carbonate rock cores exhibit weaker correlations. Traditional model permeability predictions without core categorization yield suboptimal results, with the Winland model achieving the highest <em>R</em><sup>2</sup> of only 0.365. However, after categorization, classical model permeability predictions significantly improve in accuracy. Notably, the introduced bimodal Gaussian PSD model outperforms traditional permeability prediction models, with an <em>R</em><sup>2</sup> of 0.8138, providing a valuable tool for predicting the permeability of carbonate rocks characterized by complex pore structures.</p>","PeriodicalId":9612,"journal":{"name":"Carbonates and Evaporites","volume":"22 1","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbonates and Evaporites","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1007/s13146-024-00923-y","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The heterogeneity of carbonate reservoirs, influenced by sedimentary environments and diagenetic processes, leads to the development of microfractures and vugs, posing significant challenges for reservoir evaluation. This study investigates the complex pore structures of Y-type carbonate reservoirs in the Middle East. We assess the performance of classical permeability prediction models and introduce a novel approach that incorporates a bimodal pore size distribution (PSD) derived from High-Pressure Mercury Injection (HPMI) measurements, accounting for gas slip flow effects. Our results, based on CT imaging, categorize carbonate rock core samples into matrix, fracture, and vuggy. Matrix-type carbonate rocks show a strong correlation between permeability and pore-throat radius, while fracture-type carbonate rock cores exhibit weaker correlations. Traditional model permeability predictions without core categorization yield suboptimal results, with the Winland model achieving the highest R2 of only 0.365. However, after categorization, classical model permeability predictions significantly improve in accuracy. Notably, the introduced bimodal Gaussian PSD model outperforms traditional permeability prediction models, with an R2 of 0.8138, providing a valuable tool for predicting the permeability of carbonate rocks characterized by complex pore structures.
期刊介绍：
Established in 1979, the international journal Carbonates and Evaporites provides a forum for the exchange of concepts, research and applications on all aspects of carbonate and evaporite geology. This includes the origin and stratigraphy of carbonate and evaporite rocks and issues unique to these rock types: weathering phenomena, notably karst; engineering and environmental issues; mining and minerals extraction; and caves and permeability.
The journal publishes current information in the form of original peer-reviewed articles, invited papers, and reports from meetings, editorials, and book and software reviews. The target audience includes professional geologists, hydrogeologists, engineers, geochemists, and other researchers, libraries, and educational centers.
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