Self-Assembling Sup-porosity: The Effect On Fluid Flow And Seismic Wave Propagation

doi:10.2172/1076813

GSTDTAP > 地球科学

DOI	10.2172/1076813
报告编号	DE-FG02-97ER14785
来源ID	OSTI ID: 1076813
	Self-Assembling Sup-porosity: The Effect On Fluid Flow And Seismic Wave Propagation
	Pyrak-Nolte, Laura J. [Purdue University]
	2013-04-27
出版年	2013
语种	英语
国家	美国
领域	地球科学
英文摘要	Fractures and joints in the field often contain debris within the void spaces. Debris originates from many different mechanisms: organic and/or inorganic chemical reactions/mineralization, sediment transport, formation of a fracture, mechanical weathering or combinations of these processes. In many cases, the presence of debris forms a sub-porosity within the fracture void space. This sub-porosity often is composed of material that differs from the fracture walls in mineralogy and morphology. The sub-porosity may partially fill voids that are on the order of hundreds of microns and thereby reduce the local porosity to lengths scales on the order of sub-microns to tens of microns. It is quite clear that a sub-porosity affects fracture porosity, permeability and storativity. What is not known is how the existence/formation of a sub-porosity affects seismic wave propagation and consequently our ability to probe changes in the subsurface caused by the formation or alteration of a sub-porosity. If seismic techniques are to be developed to monitor the injection and containment of phases in sequestration reservoirs or the propping of hydraulically induced fracture to enhance oil & gas production, it is important to understand how a sub-porosity within a fracture affects macroscopic seismic and hydraulic measurements. A sub-porosity will directly affect the interrelationship between the seismic and hydraulic properties of a fracture. This reports contains the results of the three main topics of research that were performed (1) to determine the effect of a sub-porosity composed of spherical grains on seismic wave propagation across fractures, (2) to determine the effect of biofilm growth in pores and between grains on seismic wave propagation in sediment, and (3) to determine the effect of the scale of observation (field-of-view) on monitoring alteration the pore space within a fracture caused by reactive flow. A brief summary of the results for each topic is contained in the report and the full details of the research and approach are contained in the publications found in the Attachment section of this report. A list of presentation and publications of all work associated with this grant is also provided.
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/6326
专题	地球科学
推荐引用方式 GB/T 7714	Pyrak-Nolte, Laura J. [Purdue University]. Self-Assembling Sup-porosity: The Effect On Fluid Flow And Seismic Wave Propagation,2013.