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焉耆油区低渗透油藏中存在低渗中阻高含水油层,其典型的生产模式是:前期生产过程中随着生产时间的增加,含水率逐渐降低并趋于稳定。这与常规的含水率随生产时间增加而逐渐升高的现象和理论相矛盾,对于这类储层在试采和生产初期易出现将油层误判为油水同层的问题。文中结合低渗中阻高含水油层的实际生产,从生产中存在的反常现象出发,以低渗高含水油层的成因入手,通过与中、高渗低阻油层的成因和产能等方面的对比,指出低渗高含水油层存在的条件是现今边水活跃、存在区域为构造的翼部,提出了低渗高含水油层的生产含水上升模式、低渗高含水油层的判别标准及最佳的生产模式,并在生产中得到了有效检验,为油田新增开采储量做出了积极贡献。
The low permeable and medium resistivity high water cut oil reservoirs are present in low permeability reservoirs in Yanqi oilfield. The typical production mode is as follows: the water cut gradually decreases and tends to be stable with the increase of production time in the early production process. This contradicts with the phenomenon that the conventional water cut gradually increases with the increase of production time and the theory is prone to misjudgment of the oil layer as the same layer of oil and water at the beginning of trial production and production. Based on the actual production of high water cut oil reservoirs with low permeability and medium permeability, starting from the anomalies existing in the production, taking the causes of low oil and high water cut oil reservoirs as a starting point, It is pointed out that the existing conditions of the low permeability and high water cut oil reservoirs are that the current edge water is active and the existing area is the structural wing. The water cut rising mode, the discriminant standard and the best production mode of low permeability and high water cut oil reservoirs are proposed , Which has been effectively tested in production and made a positive contribution to the newly increased reserves of the oilfield.