Calculations (SOC computer code) of shock pressure, position, velocity, and material displacement have been made for the Salmon detonation (design yield of 5 kt) based both on results from the Gnome event (3.1 kt in salt) and physical properties measurements of the material in the shot region. Comparison of the calculations with experimental data gives agreement for peak pressure and peak velocity within 20 to 50% over the range calculated (1 to 600 meters). Calculations and observations agreed to within 1 to 10% for shock wave arrival times, to 25% for displacement of the salt at 300 meters, and to within 10 to 50% for ground surface motion directly above the shot. The calculations based on physical properties measurements from the shot region generally gave better agreement with the data than those extrapolated from the Gnome event. The central cavity apparently grew to a radius of 24 m during the initial dynamic stage and then contracted back to a radius of 17 meters after the shot.
Several assessments of geopressured aquifers have been performed during the past several years. This paper reexamines an earlier SPE publication I in light of data available from recent research and geopressured aquifer well tests. What has been learned about geopressured aquifers in terms of reservoir parameters is incorporated to narrow the ranges of uncertainty in conducting parametric studies to predict production of natural gas. Economic sensitivity of the reservoir parameters is studied in terms of a reassessment of the capital investment and operating costs in constant (1980) dollars required for a complete geopressured aquifer production system. Test data from the U.S. DOE geopressured/geothermal well, Pleasant Bayou Well 2, are used in the analysis.
Field and laboratory work sponsored by t h e Cas Research Xnstituto (Cat) 8nd the Department of Energy (WE) have shown t h a t calcium-carbonate scale formation in waters produced with natural gas and o i l can be preventod by injection of phosphonate inhibitor i n t o t h e tomation, even i t h e fornration is sandstone without calcite binding material. c a r r i e d out on DOE'S geopressured-geothermal Gladys Hccall brine-gas well and CRI's to-production wells in the Hitchcock f i o l d .
An equation for compressibility (identical in form to the Tait equation) derived previously from the virial theorem and the Fermi—Thomas atomic model is modified on the assumption that one of its parameters (αβ0) is reciprocally related to the internal pressure when the cohesive energy density is assumed to be an essential part of the internal pressure. Pressure—volume data for about fifty homonuclear solids, two alloy systems, twenty ionic compounds, and five secondary bonded liquids are analyzed and the model found to fit with surprising accuracy when due consideration is given to pressure-induced phase or polymorphic changes and thermodynamic ``holes'' (most important near, and above, the melting point) that may contribute appreciably to specific volume. Data from static and shock methods of compression are considered and the differences noted. The model is apparently applicable to the compression of homonuclear solids and liquids, if indeed not all condensed materials in general.
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