Chap7(PI)Txt - Chapter 7...Well Performance Depletion...

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Unformatted text preview: Chapter 7...Well Performance Depletion history (Sec. 7-1) Microscopic continuity equation (Sec. 7-6) Solutions: infinite-acting (Sec. 7-7), steady state, semi-steady state Skin factors (Sec. 7-9) Chapter 7Learning Objectives Primary Secondary Tertiary Oil Rate P Ave. S o Lim EL Time P _ Prod. Inj. 0.10 0.25 0.10 Producing Phases... Depletion History. Flow rate Time Time Well pressure (b) (c) End of infinite-acting flow End of pseudo-steady-state flow Well 1 Well 2 Pressure t=1 2 3 4 5 6 7 Drainage boundary (a) t=5 Fig. 7-1 Primary Depletion History . ... Rate Time Primary Depletion History .... Economically limiting rate (economic rate).. Primary Depletion History .... Development period Extension of reservoir New wells being drilled Constant rate period Facilities limited Political issues Depletion period Idealized Depletion History . ... Rate Time Constant rate Depletion flow EL Economic life Chapter 7...Well Performance Depletion history (Sec. 7-1) Flow regimes (Sec. 7-2) Flow Regimes... Pressure Profiles... r r F l o w i n F l o w o u t h r=r w r=r e radius p(r,t) p skin p wf Steady-State Pressure Profiles... r=r w r=r e p(r,t) radius p i Pressure and Rates... r=r w r=r e p(r,t) radius t 1 t 2 t 3 p i t>t 4 r=r w r=r e rate Well rate Well Pressures r=r w r=r e p(r,t) radius t 1 t 2 t 3 p i t>t 4 time pressure Semi-Steady State Profiles... r=r w r=r e p(r,t) radius t>t 4 Semi-Steady State Profiles... t 1 t 2 t>t 4 r=r w r=r e p(r,t) radius t 3 p r = r=r w r=r e rate Well rate Semi-Steady State Profiles... t 1 t 2 t>t 4 r=r w r=r e p(r,t) radius t 3 p r = time pressure Chapter 7...Well Performance Depletion history (Sec. 7-1) Flow regimes (Sec. 7-2) Microscopic continuity equation (Sec. 7-6) Microscopic Continuity Equation... Undersaturated Oil... S o B o t + 1 r ru o B o r = Recall Microscopic Continuity Equation... Undersaturated Oil... c f + c o ( 29 S o p t + o S o t = k o 1 r r r o o p r Microscopic Continuity Equation... Undersaturated oil and small, constant compressibility... 1 p t = 1 r r r p r Sec. 7-6 Continuity Equation... = k o o c t Fluid diffusivity (storativity) [=]L 2 /t Chapter 7...Well Performance Depletion history (Sec. 7-1) Flow regimes (Sec. 7-2) Microscopic continuity equation (Sec. 7-6) Solutions: infinite-acting (Sec. 7-7), steady state, semi-steady state Stabilized flow (Sec. 7-8) Constant Terminal Rate......
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This note was uploaded on 01/30/2011 for the course PGE 323K taught by Professor Lake during the Spring '08 term at University of Texas at Austin.

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Chap7(PI)Txt - Chapter 7...Well Performance Depletion...

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