Research and Practice of Acid Fracturing Technology for Offshore mixed Rock Reservoirs
BH oilfield is a low-per meability reservoir with a mixture of sandstone and carbonate rocks.Due to its co mplex lithological distribution,poor connectivity in the plane,and thin interbedded develop ment in the vertical direction,its production capacity decreases rapidly after production.On the one hand,conventional unblocking treat ment has a short radius,which cannot achieve effective production increase.On the other hand,due to the presence of screen pipes underground,sand fracturing is not econo mically feasible.To address the above two challenges,opti mize a multi-layer pitching sliding sleeve fracturing string and multi-stage alternating injection process.At present,the acid fracturing process has been successfully co mpleted in the mixed rock reservoir of BH oilfield,with a daily increase of over 70 cubic meters of oil after i mple mentation,effectively solving the proble m of poor connectivity and insufficient vertical utilization of mixed rock reservoirs.This provides technical support for the large-scale develop ment of mixed rock reservoirs in BH oilfield and provides reference for the effective utilization of si milar reservoirs.
mixed rock reservoirAcid pressing processA multi-layer pitching slide fracturing pipe stringmulti stage alternating injection process
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维普
