PROCEDURE OF FORMATION OF HYDRO-POWER FLOW IN DRILL WELL Russian patent published in 2009 - IPC E02B9/00 

FIELD: oil and gas production.

SUBSTANCE: procedure consists in drilling well to thief zone, in communicating well to surface reservoir with control of water consumption and/or to drilled by well water bearing intervals in upper part of well and to thief zone in its lower part, and in installing hydro-unit or imitator of its hydro-resistance corresponding to nominal mode of hydro-unit operation in lower part of well slightly above intersection of well with thief zone. Position of dynamic level in well H_dl (m) is determined at dynamic mode of well; also pressure level H_dp is determined from formula: H_dp (m)=L_heu-H_dl, where L_heu is distance from the wellhead to location of the hydro-unit in the well, m; then well flow metre survey is performed in interval from dynamic level to a place of hydro-unit installation, while hydraulic power of flow in the place of hydro-unit location N_r is determined from formula: N_r=p·q·H_dp·Q_heu, where N_r is hydraulic power of water flow in the well in the place of hydro-unit installation, m³/s (from well flow metre survey); p is water density, kg/m³; q is acceleration of free fall, m/s². Thief zone is artificial and formed with a collector or reservoir in rock made, for example by hydraulic break of the bed in a concerned interval with well drilled in them.

EFFECT: invention facilitates upgraded accuracy of determination of hydraulic power of flow in well under various mining-hydraulic-geologic-technical conditions; it also facilitates forecasting and justifying ways of upgraded formation of hydro-power flows in wells of energy purpose.

2 cl, 2 dwg