tight gas sands: permeability, pore structure and clay

gas permeability has been measured on a suite of cores from the spirit river tight gas sand of western alberta and on two samples from the cotton valley formation of east texas. using nitrogen as the mobile fluid, the author has measured permeability as a function of partial water saturation at pressure and confining pressure samples from..

fluid loading in low permeability gas wells in the cotton valley sands of east texas

in natural flow, the gas velocity governs whether the fluid produced into the wellbore will be conveyed to the surface of allowed to fall back on the formation. it is therefore of extreme importance that a method for predicting the minimum or critical velocity be established. a modified calculation procedure, based on actual flow data, fo..

sediment yield from a mississippi delta cotton field

sediment yield from flat (0. 2 slope) delta fields was measured during a 33-month study. annual erosion rates were higher than anticipated. highest sediment concentrations in runoff occured in the spring during the seedbed preparation and planting season when the soil was bare of vegetative cover, freshly plowed, and highly susceptible to..

wind assisted deep-well pumping

a 37-kw, vertical-axis wind turbine was successfully coupled to an existing irrigation pump by installing a combination gear drive between the pump and electric motor. the system operated as a wind-assisted system because the wind turbine reduced the load on the electric motor and saved energy. to synchronize the two power sources, an ove..

fluidized-bed combustion and gasification of biomass

fluidized-bed energy technology offers several unique characteristics for using biomass in small-scale energy conversion operations. this paper reports on a study undertaken to evaluate two fluidized-bed energy conversion methods using agricultural biomass - direct combustion and gasification. a 0. 61 meter diameter fluidized-bed combusti..

analysis of the structure of local wind systems in a broad mountain basin

the local wind systems in south park, a broad, flat basin in the colorado rockies, are discussed. a description is given of the evolution of these wind systems on a typical, dry day in south park, i. e. , a day in which thermal forcing by local terrain features is not disturbed by large-scale pressure gradients or by circulations accompan..

ce(iv)-induced polymerization of allyl methacrylate with cotton cellulose

in the reported experiments, ce(iv)-induced polymerization of allyl methacrylate (ama) with cotton cellulose was investigated under a variety of conditions. polymer add-on was directly related to ama concentration. the same holds good for ce(iv) ion concentration up to a certain concentration (30 mmol/l), after which it decreases polymer ..

interference of scopoletin with measurement of histamine content of cotton dust

scopoletin (7-hydroxy-6-methoxycoumarin) is a major extractable component of cotton plant parts. it exhibits a strong blue fluorescence peak when activated in the near uv region. further, histamine has been reported to be present in cotton plant parts. the results reported in this paper show that scopoletin is carried through the standard..

new method for flocking plastics

this paper is concerned with technology of the flocking process which involves giving a surface a textile character by first coating the substrate with adhesive and then applying short, monofilament staple fibers (flock). by far the most commonly used fiber materials are polyamide, cotton and viscose. the so-called handle of the surface d..

tillage influences monthly wind erodibility of dryland sandy soils

tillage will reduce the wind erodibility of sandy soils, but the extent of the reduction depends on the type of tillage and the weather conditions. moldboard plowing a fine sandy loam will increase the percentage of nonerodible aggregates 18 percent and listing will increase it 7. 8 percent. partitioning the estimated wind erosion by mont..