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<br /> <br /> <br /> <br />C3 -- outermost string, extends short distance below top of cavity <br />Cq -- protective string, cemented through cap rock <br />Pt -- surface pressure (psig @ wellhead), discharge pressure inside C1 <br />Py -- surface pressure Ct - Cz annulus <br />Pg -- surface pressure CZ - C3 annulus <br />Pq -- surface pressure C3 - Cq annulus <br />R -- radius of sphere (ft.) <br />h -- distance from top of cavity to blanket-water contac[ (ft.) <br />L -- distance from bottom of cavity to outlet, in effect length of Ct (ft.) <br />V„o -- volume of brine discharged from cavity <br />V ~.; -- volume of fresh water pumped into cavity <br />V ~ -- volume of insoluble ma[erial removed from cavity <br />V y -- volume of cavity space occupied by lilanket ma[erial <br />V ,;~ -- volume of cavity space occupied by water <br />S ,;o -- average specific gravity of V,,.o <br />S M.; -- average specific gravity of V,;; <br />S w~ -- average specific gravity of V,;~ <br />F„o -- salinity factor of V„o <br />F,,; -- salinity factor of Vw.; <br />F,,.~ -- salinity factor of V„~ <br />V -- veloci[y of outlet brine (ft. /sec.) <br />q -- acceleration of gravity (32. 2 ft. /sec. /sec.) <br />W -- specific weight of outlet brine (Ibs. /cu. ft.) <br />ff -- friction loss in (ft. head/ft. length) <br />V~ -- volume of cavity <br />M -- distance from the surface to the blanket-water contact <br />REFERENCES <br />1. Robert B. Bizal, "New Storage Caverns Hike Capacity by 15°/o," The Oil and Gas Journal, Octo- <br />ber 29, 1962, pp. 130-135. <br />2. "Underground Storage for Petroleum," a report of the Interstate Oil Compact Commission, Re- <br />search and Coordinating Commi[tee, Oklahoma City, April 1956. <br />3. O. 6. Dommers, "Feasibility of Creating Spherical Cavities in Underground Salt Domes," The- <br />sis, The University of Texas, Dept, of Petroleum Engineering, August 1961. <br />4. Donald R. Remson, "Model Studies of Techniques for Dissolving Spherical Cavities in Massive <br />Salt," Thesis, The University of Texas, Dept. of Petroleum Engineering, January 1963. <br />5. Hossein Kazemi, "Mechanism of Flow and Controlled Dissolution of Salt in Solution Mining," <br />Dissertation, The University of Texas, Dept. of Petroleum Engineering, August 1963. <br />310 <br /> <br />