Exploration and Application of Early Profile Control in NH 201
NH201 block is a tipical beach-bar sand reservoir with high porosity and permeability.Now,it is in early development stage.After waterflooding,plane and interlayer reserves are uneven producted.The numerical simulation result shows that water will break through in may 2019 and then the water cut will rise very quickly.To solve this problem,we select NH2-16 and NH2-31 for early profile control test.On this basis,it is extended to the remaining 6 wells in the block.after profile control of 8 water injection wells,the injection pressure rose and intake profiles obtained obviously improved.The streamline start-up rate increased from 35.5%to 64.5%.to may 2020,the daily oil production level is stable at 232 t and the comprehensive water cut is controlled at 18%,which is obviously lower than the predicted value of numerical simulation.Early profile control has remarkable effect of water control and oil stabilization which provides a new idea for stable production and development of integrated heterogeneous reservoirs.
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