Abstract: Reasonable developing well spacing for condensate gas reservoir is usually determined by empirical value. During working out development project in Yakela condensate gas reservoir, two methods were used to determine it:①based on retrograde condensation characteristics of reservoirs, combining well spacing with oil recovery, reasonable developing well spacing of 1 200 m was determined with reservoir numerical simulation.② based on balance between gas and condensate oil price and oilfield construction and drilling cost, the least reasonable developing well spacing of 1 079 m was determined by calculating recoverable reserve of single well at economic limit.These methods are practical, simple and reliable.

Key words: Tarim basin, Yakela gasfield, Condensate gas reservoir, Well spacing, Reservoir numerical simulation, Reserve