{"title":"Experimental Study of Failure of a Porous Medium during a Pressure Drop","authors":"E. V. Zenchenko, S. B. Turuntaev","doi":"10.1134/S1069351325700594","DOIUrl":null,"url":null,"abstract":"<p><b>Abstract</b>—A number of negative consequences are associated with a pore pressure drop in permeable fluid-saturated rocks: sudden coal outbursts, destruction of the borehole surrounding rock in oil producing wells, methane emissions as a result of permafrost degradation, etc. The article discusses results of a series of model laboratory experiments to study the destruction of a porous fluid-saturated material of low strength during rapid pressure release at its boundary. The rate of pressure release, the strength properties of the material, the presence of gas, and the position of the boundary between the gas and fluid were varied. The conditions for the formation of microcracks and permeability increase during repeated cycles of pressure growth-release were found. It has been established that with an increase in the rate of pressure release, the number of cracks formed, and the depth of destruction increases. Numerical modeling of the formation of macrocracks during pressure release in gas-filled samples was carried out.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"61 4","pages":"650 - 660"},"PeriodicalIF":1.0000,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Izvestiya, Physics of the Solid Earth","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1134/S1069351325700594","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract—A number of negative consequences are associated with a pore pressure drop in permeable fluid-saturated rocks: sudden coal outbursts, destruction of the borehole surrounding rock in oil producing wells, methane emissions as a result of permafrost degradation, etc. The article discusses results of a series of model laboratory experiments to study the destruction of a porous fluid-saturated material of low strength during rapid pressure release at its boundary. The rate of pressure release, the strength properties of the material, the presence of gas, and the position of the boundary between the gas and fluid were varied. The conditions for the formation of microcracks and permeability increase during repeated cycles of pressure growth-release were found. It has been established that with an increase in the rate of pressure release, the number of cracks formed, and the depth of destruction increases. Numerical modeling of the formation of macrocracks during pressure release in gas-filled samples was carried out.
期刊介绍：
Izvestiya, Physics of the Solid Earth is an international peer reviewed journal that publishes results of original theoretical and experimental research in relevant areas of the physics of the Earth''s interior and applied geophysics. The journal welcomes manuscripts from all countries in the English or Russian language.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
