Oil reservoir three-dimensional gas injection method and well pattern structure
A technology of gas injection wells and network structure, which is applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc., can solve the problem that thick oil reservoirs cannot replenish oil reservoir energy well, and can not well suppress bottom water coning , gas injection mode and insufficient recovery effect, etc., to achieve the effect of improving development effect, increasing microscopic sweep coefficient, and increasing oil production rate and recovery factor
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[0044] This embodiment provides a three-dimensional gas injection method and well pattern structure for a reservoir. Targeting at Block Xinggu 7, Xinggu Buried Hill Reservoir in Liaohe Oilfield. The reservoir has ancient strata, complex structure and diverse lithology. It is a massive fractured massive bottom water metamorphic buried hill reservoir. The experimental area is 9.77km 2 , The thickness of the reservoir is 2335m, and the geological reserve is 3537×10 4 t, matrix reserves accounted for 65%, macro-fracture reserves accounted for 12%, micro-fracture reserves accounted for 23%, reservoir matrix permeability was 0.47mD, fracture permeability was 140mD, formation crude oil viscosity was 0.527MPa·s.
[0045] A three-dimensional injection-production well pattern with four sections and seven-layer vertical stacking and staggered injection-production wells with a spacing of 300m on the plane and 200m in the vertical direction was selected. A total of 63 wells ...
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