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Information Seminar Paper

Title

ANALYTICAL CALCULATION OF MINIMUM MISCIBILITY PRESSURE

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Abstract

 MISCIBLE GAS INJECTION INTO OIL RESERVOIR IS COMMONEST METHOD TO ENHANCED OIL RECOVERY (EOR). KEY PARAMETER IN MISCIBLE DISPLACEMENT IS “ MINIMUM MISCIBILITY PRESSURE”(MMP). ANALYTICAL CALCULATION IS ONE OF THE METHODS, WHICH DETERMINES THIS PARAMETER. THE ANALYTICAL THEORY OF ONE-DIMENSIONAL, DISPERSION-FREE DISPLACEMENT OF OIL BY INJECTION GAS WITH NC COMPONENTS HAS SHOWN THAT THE BEHAVIOR OF THE DISPLACEMENT IS COMPLETELY CONTROLLED BY A SEQUENCE OF KEY TIE LINES: THOSE THAT EXTEND THROUGH THE INITIAL OIL, INITIAL TIE LINE, AND INJECTION GAS COMPOSITIONS, INJECTION TIE LINE, AND NC-3 TIE LINES KNOWN AS CROSSOVER TIE LINES. THE THEORY ALSO DEMONSTRATES THAT IF ANY ONE OF THE KEY TIE LINES BECOMES A CRITICAL TIE LINE, THE DISPERSION-FREE DISPLACEMENT BECOMES PISTON-LIKE, AND MULTI-CONTACT MISCIBILITY DEVELOPS. THEREFORE, THE MINIMUM MISCIBILITY PRESSURE (MMP) IS CALCULATED AS THE LOWEST PRESSURE AT WHICH ANY ONE OF THE KEY TIE LINES BECOMES A CRITICAL TIE LINE. THIS PAPER CONTAINS RESULTS OF USING THIS METHOD FOR STUDY OF THE GEOMETRY OF THE KEY TIELINES IN TERNARY AND PSEUDO TERNARY SYSTEMS (INITIAL OIL AND INJECTION GAS TIELINES) AND MMP IS PRESENTED IN THIS DISSERTATION.

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