After the long-term development of a strong edge water-positive rhythms reservoir,the edge water gradually evolves into secondary bottom water by protruding along the bottom of the sandstone.Different from primary bottom water,the secondary bottom water flows in the horizontal direction.In order to study the pressure coning method of secondary bottom water reservoir,taking S1 Block as an example,the feasibility of different pressure coning methods is demonstrated for different positions in the plane,and the methods of water production pressure cone,separating production pressure cone,and shrinking pressure cone are applied in the field.The results show that the secondary bottom water in the high part of the reservoir has a slow flow rate in the horizontal direction,which can be regarded as the primary bottom water.The effect of the shrinking pressure coning and the shut-in pressure coning is not good,while the pressure-producing coning can help to guide the reverse movement of the water cone to realize the water cone falling back,and the production pressure coning can keep the water cone stable to ensure the oil production and the application effect is good.The secondary bottom water in the lower part of the reservoir flows fast in the horizontal direction,the pressure of the water body is relatively low,and the coning power is weak.Using the method of shrinking pressure coning for production can achieve good development results.
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