Abstract
Daning-jixian area is the main distribution area of Carboniferous-Permian coal-bearing rock series in eastern Ordos basin. the enrichment of coalbed methane in the study area is not only controlled by the modern characteristics of the structure, but also closely related to the buried-palaeogeothermal-hydrocarbon history of coal reservoirs under the control of tectonic evolution, which is an important kinetic factor for coalbed methane enrichment. The characteristics, lithology, lithofacies and spatial assemblages of coal-bearing rocks are controlled by the sedimentary environment, and the multigenerational reservoir-cap assemblage increases the thickness and sealing property of the caprock, so the depositional action is very large It controls the coal reservoir gas material base, reservoir cover combination characteristic and reservoir property, and affects the coal bed methane preservation through the combination relation between coal seam and surrounding rock.
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