Abstract: A fluid stream has material selected from the group consisting of radioactive matter and metals removed from it. An example material to be removed is cesium ions. A silico-titanate composition have a mole ratio of Si:Ti of 0.01:1.7 is provided in the fluid stream. The material to be removed is them permitted to bind to the silico-titanate composition. The silico-titanate composition may include a metal dopant MD present in a mole ratio of MD:Ti up to 1.0. The silico-titanate may also be a cation M present in a mole ratio of M:Ti up to 2.0.

Abstract: Computer-implemented methods of processing seismic data are subjected to quantitative evaluation by a computerized testing procedure. The effect of the data processing software under evaluation on attributes of the seismic data is measured and statistically evaluated. The effect of various user-selectable processing parameters of the software under evaluation is also measured and statistically evaluated. To evaluate the software effect on attributes, an attribute of known content represented by seismic data is selected. The seismic data represented by that attribute is processed by the processing software under evaluation. A test measure of the attribute is recomputed as indicated by the results of the processing. A quantitative statistical analysis of the similarities of the two attributes is then performed. For quality control of parameter estimates, a parameter-sweep test is performed on original data containing known events.

Abstract: Features of subsurface earth reservoirs of interest are made available for analysis and evaluation by forming three-dimensional, geologic block models based on field data. The field data include geological observations, such as lithofacies and porosity values obtained from well data and other sources, as well as geophysical data, usually from seismic surveys. The geologic models representative of subsurface reservoirs so obtained are optimized to match as closely as feasible geologic constraints known or derived from observed geologic data. The models also conform to geophysically based constraints indicated by seismic survey data. The modeled geologic lithofacies and porosity are converted into acoustic velocity and bulk density values, which are then formulated as a seismic response which is then compared with actual seismic data.

Abstract: Computer-implemented methods of processing and imaging seismic data by migration and DMO (dip moveout) are subjected to quantitative evaluation. The evaluation is done by a computerized testing procedure. An impulse data set is formed containing a single "live" trace and zero amplitudes for other traces. A selected velocity function is also generated. The impulse data set is then processed by the processing method being evaluated. Estimates of the vertical traveltime, amplitude and phase along each of the impulse-response events are then generated. The estimates so formed are compared against exact values obtained from a model using an integral equation which accurately describes migration or DMO. Users thus are provided with indications of how the processing techniques may be expected to perform on real data.

Abstract: Mass, or changes in mass, of a rock specimen are measured to determine the changes in saturation of a rock specimen. Measurements can be obtained in test environments of high temperature or high pressure or both. The mass is rigidly attached beneath a stiff spring and made to vibrate or oscillate at a characteristic frequency. The frequency of oscillation is detected and the data then used to determine mass of the specimen.