Development effect of low - permeability oil field is
getting worse than expectation result in the early days of
oilfield development , dve to the fact that permeability
decreases caused by formation pressure decreasing and
overburden static pressure relatively increasing ;and reservoir
flow state changes form pseudo - Darcy flow according to
actual conditions of low - permeability reservoirs of Pucheng
oil field , deflition on the conception of technical limit well
spacing was givenland in the light of folw rate and flow
verlocity equations of filtrate and experimental model (critical
displacement pressure gradient) established by lad test and in
- situdata , an equaition was used for calculating technical
licit well spacing of Unit 67 of Pucheng oil field ,Pucheng oil
complex ,and reasonable calculation results were obtained.
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