کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5476568 1521418 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An experimental investigation of coupled chemico-mineralogical and mechanical changes in varyingly-cemented sandstones upon CO2 injection in deep saline aquifer environments
ترجمه فارسی عنوان
یک بررسی تجربی از ترکیب شیمیایی-کانی شناسی و مکانیکی در ماسه سنگهای مختلف سیمان پس از تزریق دی اکسید کربن در محیط آبهای عمیق شور
کلمات کلیدی
شیمیایی، مواد معدنی مکانیکی، ضبط کربنات، سیلیکات،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
According to the test results, compared to the silicate cement-dominant mineral structure (SS), the presence of a carbonate cement-dominant mineral structure (CS) in the aquifer rock formation creates more significant alterations in the formation's chemico-mineralogical structure upon CO2 injection. This is because calcite mineral reactions occur at much greater rates compared to quartz mineral reactions in CO2-exposed environments. In addition, although some minor precipitation of kaolinite minerals may also occur upon CO2 injection, the effect may not be significant. Overall, rock mineral changes in deep saline aquifers upon CO2 injection have a significant influence on the strength characteristics of the reservoir rock mass, depending on the aquifer mineral structure, and CS formations are subject to much greater strength property changes upon exposure to CO2 than SS formations. Interestingly, CO2 injection causes a strength gain in SS sandstone and a strength reduction in CS sandstone. These mechanical property alterations in aquifer rock formations are also dependent on the CO2 injection pressure and phase, and increasing the injecting CO2 pressure significantly enhances the changes, due to the highly acidic environment created by the enhanced CO2 solubility process. Changing the CO2 phase from sub- to super-critical condition also accelerates the reaction mechanisms, due to the greater chemical potential of super-critical CO2. However, overall SS sandstone exhibits more stable chemical-mineralogical and mechanical characteristics upon CO2 injection than CS sandstone, and exhibits more suitable characteristics for CO2 sequestration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 133, 15 August 2017, Pages 404-414
نویسندگان
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