کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8914469 1640472 2018 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Directional semivariogram analysis to identify and rank controls on the spatial variability of fracture networks
ترجمه فارسی عنوان
تجزیه و تحلیل نیمواریوگرافی جهت جهت شناسایی و رتبه بندی کنترل تغییرات فضایی شبکه های شکستگی
کلمات کلیدی
سومیاریوگرام، شکستگی، عیب، تا کردن، آرچس پارک ملی،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی
In this study, the directional semivariogram is deployed to investigate the spatial variability of map-scale fracture network attributes in the Paradox Basin, Utah. The relative variability ratio (R) is introduced as the ratio of integrated anisotropic semivariogram models, and R is shown to be an effective metric for quantifying the magnitude of spatial variability for any two azimuthal directions. R is applied to a GIS-based data set comprising roughly 1200 fractures, in an area which is bounded by a map-scale anticline and a km-scale normal fault. This analysis reveals that proximity to the fault strongly influences the magnitude of spatial variability for both fracture intensity and intersection density within 1-2 km. Additionally, there is significant anisotropy in the spatial variability, which is correlated with trends of the anticline and fault. The direction of minimum spatial correlation is normal to the fault at proximal distances, and gradually rotates and becomes subparallel to the fold axis over the same 1-2 km distance away from the fault. We interpret these changes to reflect varying scales of influence of the fault and the fold on fracture network development: the fault locally influences the magnitude and variability of fracture network attributes, whereas the fold sets the background level and structure of directional variability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Structural Geology - Volume 108, March 2018, Pages 34-51
نویسندگان
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