Conferences, Lectures, & Seminars
Events for October
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New Vistas in Dispersion Science and Engineering
Thu, Oct 09, 2008 @ 12:45 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Lyman Handy Colloquium SeriesPresentsDarsh WasanProfessor, Dept. of Chemical Engineering Illinois Institute of Technology, Chicago, Illinois 60616Abstract:
Colloidal suspensions are used in a variety of technological contexts. For example, their spreading and adhesion behavior on solid surfaces can yield materials with desirable structural and optical properties. The structure and stability of colloidal dispersions depend highly on the interaction forces between colloidal particles and the confining geometries. This is especially the case in a concentrated colloidal dispersion when particles are more likely to come in close contact with one another and become more ordered in the confines of their restricted environment. In recent years, due to the advent of new instrumentation for measuring interaction forces in colloidal suspensions, novel forces, such as the structural force arising from the energy barrier caused by particle microstructuring and the attractive depletion force caused by the excluded volume effect, have been characterized. This lecture will highlight the role of structural forces in stabilizing dispersions and especially point out their importance in a variety of technological contexts, such as particle sedimentation, wetting, spreading and adhesion of such systems on solid surfaces and nanostructured material synthetics.Darsh T. Wasan is the Motorola Chair Professor of Chemical Engineering and Vice President for International Affairs at Illinois Institute of Technology (IIT).Location: Olin Hall of Engineering (OHE) - 122
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
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Efficient Ensemble-Based Closed-Loop Production Optimization
Thu, Oct 23, 2008 @ 12:45 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Mork Family Department of Chemical Engineering and Materials Science Distinguished Lecture SeriesPresentsProfessor Dean OliverMewbourne School of Petroleum and Geological Engineering,
University of Oklahoma, Norman, OK 73019Abstract:
With the advances in smart well technology, substantially higher oil recovery can be achieved by intelligently designing the operation scheme in a closed-loop optimization framework. The closed-loop optimization consists of two parts: geological model updating and production optimization. Both of these parts require gradient information to minimize or maximize an objective function: squared data mismatch or the net present value (or other quantities depending on different financial goals), respectively. Alternatively, an ensemble-based method can acquire the gradient information through the correlations provided by the ensemble. Computation in this way is nearly independent of the number of control variables, reservoir simulator and simulation solver. We propose a new method for closed-loop optimization, which combines an ensemble based optimization scheme (EnOpt) with the ensemble Kalman filter (EnKF). The EnKF adjusts the reservoir models to honor observations and propagates the uncertainty in time. EnOpt optimizes the expectation of the net present value based on the updated reservoir models. The combined method is robust, completely adjoint-free and can be readily used with any reservoir simulator. The proposed scheme is illustrated with the Brugge Field test example developed for the SPE-ATW on Closed-Loop Optimization. This test problem has 10 injectors, 20 producers and 3 completion intervals per well that can be controlled independently.Location: Olin Hall of Engineering (OHE) - 122
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir