METHOD FOR SMALL OR MEDIUM-SIZE OIL OR GAS DEPOSIT DEVELOPMENT Russian patent published in 2007 - IPC E21B43/16 

FIELD: oil and gas production, particularly to develop oil or gas deposits united with common hydrodynamic basin within the boundaries of separate zones or license territories at any deposit development stage.

SUBSTANCE: method involves injecting working agent in water-bearing part of hydrodynamic basin and extracting product from fields. The fields are explored by seismic testing thereof. Then geological models are created and reflection horizons and raisings are marked. After that development test and production wells are drilled to said risings, core is recovered and petrophysical investigation is carried out. Then geophysical and hydrodynamic investigations are performed and geological-hydrodynamic field models are created. Oil and gas resources are calculated and oil and gas production characteristics are predicted on the base of created geological-hydrodynamic field models with different flooding systems. Then hydrodynamic investigations are carried out in transient regimes by creating disturbance pulses in some wells in separate fields and by monitoring well advancing to wells of other fields. After that elasto-capacitive and filtration characteristics of water-bearing horizon between fields are determined. Geological-hydrodynamic field model for hydrodynamic basin including separate fields is created. The fields are simulated as large wells within basin to be modeled. Individual product extraction volumes and reservoir pressure levels are set for each field by working agent injection via injection wells drilled in water-bearing basin sections between separate raisings. The raisings are then detailed by creation of geological-hydrodynamic models for each separate field along with production well system drilling therein.

EFFECT: increased development efficiency, namely intensified oil production and improved oil recovery factor for all fields (pools) and for separate field (pool) within imaginary boundary enveloping several fields (pools).

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