Gravity factor corrects horizontal well PI calculation

Journal Article · Mon Aug 17 04:00:00 EDT 1992 · Oil and Gas Journal; (United States)

OSTI ID:7032971

Chang, M M; Pautz, J F ^[1]

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1. Natural Inst. for Petroleum and Energy Research, Bartlesville, OK (US)

This paper reports that when a reservoir fluid's viscous force is not significantly greater than the gravity force, a gravity correction factor must be included in the productivity index (PI or J) calculations for horizontal wells located vertically away from the middle of the pay zone. For both steady state and pseudosteady-state production stages, in simulations, the PI of horizontal wells increases as the horizontal lateral's distance from the top of the pay zone becomes greater. Several methods can quickly estimate a horizontal well's productivity under different production stages including steady state and pseudosteady state.

• OSTI ID: 7032971
• Journal Information: Oil and Gas Journal; (United States), Journal Name: Oil and Gas Journal; (United States) Vol. 90:33; ISSN OIGJA; ISSN 0030-1388
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
CALCULATION METHODS
DIRECTIONAL DRILLING
DRILLING
ENGINEERING
ENHANCED RECOVERY
FLUID FLOW
FLUIDS
OIL WELLS
PRODUCTIVITY
RESERVOIR ENGINEERING
RESERVOIR FLUIDS
SIMULATION
VISCOUS FLOW
WELLS