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随着开发的逐步深入,地层压力逐渐降低,油井作业次数增多,油层原有的物性和岩石基本结构在一定程度受到破坏,从而打破了油藏油、气、水原有的压力平衡条件,它带来的影响是渗透率降低、油层物性变差、原油赖以产出的条件变差。从短期行为来看,仅仅是产量的降低;从长期角度来看,油层会导致难以修补的伤害,不利于油田长期开发。同时,由于小断块油田、低渗油层较多,连通性不好,油层导油能力差,先天条件决定了开采难度势必要加大。
With the gradual deepening of development, formation pressure gradually decreases, the number of well operations increases, the original physical properties of the oil and the basic structure of the rock are destroyed to a certain extent, thus breaking the original pressure equilibrium conditions of oil, gas and water in the reservoir. The impact of this is that the permeability is reduced, the physical properties of the reservoirs deteriorate, and the conditions on which crude oil is produced are poorer. From a short-term behavior point of view, it is only a decrease in production; from a long-term perspective, the oil layer can cause hard-to-repair damage and is not conducive to the long-term development of the oilfield. At the same time, due to the small fault block oil field, low permeability reservoir, connectivity is not good, poor oil conductivity, natural conditions determine the difficulty of mining is bound to increase.