Selecting Computer‐Aided Instructional Software

Interactive computing can address the needs of a variety of learning styles, and a broad range of educational objectives, while serving a number of pedagogical roles: Presentation, Assessment, Exploration, and Analysis. These three issues are discussed in detail, along with examples from chemical engineering educational software, to help faculty learn how to analyze educational software to ensure that it's meeting the needs of their students.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94748/1/j.2168-9830.1996.tb00208.x.pd

Interactive creative problem solving

A set creative problem‐solving tools for instructional purposes is discussed. The tools include a problem‐solving text which presents the heuristic, a set of slides in electronic form that can be used to enhance classroom presentations, and interactive computer modules that reinforce and develop the students' problem‐solving skills. © 1996 John Wiley & Sons, Inc.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/110731/1/4_ftp.pd

A fundamental wax deposition model for waterâ inâ oil dispersed flows in subsea pipelines

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/138353/1/aic15750.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/138353/2/aic15750_am.pd

Interactive computer modules for undergraduate chemical engineering instruction

Interactive computer modules have been developed for four of the core courses in the Chemical Engineering curriculum: Introduction to Chemical Engineering, Fluids/Transport, Separations, and Kinetics. These modules generally consist of a review of the material, followed by an interactive problem‐solving session, which may include a computer simulation of the processes involved. The problem is often presented as part of a scenario, to capture the student's interest, and hints are available to guide the student. This study examines the components of these modules, as well as considerations that educators should take into account when developing interactive computer modules.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/106870/1/6180010103_ftp.pd

Microemulsion Applications in Carbonate Reservoir Stimulation

Carbonate reservoir stimulation involves the injection of reactive fluids, most commonly hydrochloric acid (HCl), into the porous media to enhance the permeability and increase hydrocarbon production. This process results in the formation of highly conductive flow channels, or wormholes, and relies on the deep penetration of reactive fluids into the formation to maximize stimulation success. However, the rapid rate of reaction of HCl with the carbonate rock often limits the depth of live acid penetration. The reaction is mass transfer limited under typical reservoir conditions. As a result, the acid diffusion and convection rates significantly influence the success of the treatments. Microemulsions prepared with HCl as the dispersed phase offer a solution to significantly reduce the effective diffusivity and, hence, increase the depth of stimulation. This chapter presents the results of laboratory studies of carbonate dissolutions using acid microemulsions and highlights case histories of industry applications using macroemulsions for carbonate reservoir stimulation

Acidization--VI : On the equilibrium relationships and stoichiometry of reactions in mud acid

A method is presented for determining the distribution of reaction products and the stoichiometric coefficient for the reaction of mud acid (HF/HCl) with various minerals. To illustrate the techniques, the dissolution of two common alumino-silicates, potassium feldspar and kaolinite, in mud acid is investigated for various temperatures and acid concentrations. After determining the product distribution from the ionic equilibrium relationships involving the various fluoride ion complexes, the stoichiometric coefficient [moles HF consumed per mole mineral dissolved] is arrived at through a numerical solution of the coupled equilibrium and mole balance equations. The HF acid stoichiometric coefficient was found to decrease significantly with increasing temperature and HCl acid concentration. This information is of great importance in determining design conditions for the matrix acid stimulation of oil reservoirs.AbstractIn the above analysis we have found how the HF stoichiometric coefficient in the reaction between mud acid and two alumino-silicates varies with acid concentration and temperature. The HF stoichiometric coefficient is defined as the moles of HF acid consumed per mole of mineral dissolved. The information obtained in this study is of great importance in the design of the acid stimulation of well reservoirs. It was found that the same stoichiometric coefficient can result for two different sets of mud acid concentrations. Consequendy, one could evaluate which set of mud acid concentrations would be most economically feasible. In addition to the economical considerations, the prediction of the overall stoichiometric coefficient for the dissolution of a sandstone is of vital importance in determining the acid capacity number. From this number, one can calculate the penetration radius of the permeability front resulting from matrix acid stimulation of the reservoir.In calculating the stoichiometric coefficient we first determined the distribution of the aluminum-fluoride and silicon-fluoride complexes resulting from the dissolution of the mineral using the ionic equilibrium relationships. A numerical solution of the coupled mole balance and equilibrium equations was then carried out to determine the stoichiometric coefficient with respect to HF and HCl for the specified mineral dissolution. These results were found to agree satisfactorily with previously reported experimental values.The results of this analysis showed that the HF stoichiometric coefficient decreases with increasing temperature. In addition it was found to decrease during the course of the mud acid-mineral reaction. The most important results of this study are related to the variation of the HF stoichiometric coefficient with HCl concentration. This coefficient was found to be virtually independent of HCl concentration below concentrations of ca. 5 x 10-2 M HCl. Above this concentration it was found to decrease significantly with increasing HCl concentration.A technique for estimating the overall stoichiometric coefficient for a sandstone from the coefficients of the individual minerals has been found to be in satisfactory agreement with the numerical technique involving the ionic equilibria for the sum of all minerals present which had to be carried out on the computer, for each sandstone composition.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/23004/1/0000572.pd