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尕斯E31油田通过注水开发,目前已进入中高含水开发阶段,随着油田注水开发的不断深入,油田含水不断升高,油水关系进一步复杂,油田层间、层内、平面矛盾加剧。高含水油井逐年增多,稳产难度加大。油田主力层水淹状况严重,次非主力层动用状况较差。目前解决油藏开发中的这些主要矛盾的措施施工主要为水井的调剖调驱以及高含水油井的堵水为主。尕斯油田E31油藏,地层平均温度126℃,地层水矿化度相对较高,常规聚合物凝胶调剖调驱剂在高温、高矿化度条件下,容易产生破胶、降解等现象,凝胶体系的稳定性较差,有效期短,控水增油效果不显著。因此研发适合尕斯E31油藏的可动凝胶调剖调驱剂配方体系,对于降低施工液体成本,提高弱凝胶成胶稳定性能,大规模推广调剖调驱技术,改善尕斯油田的注水开发效果,具有特别重要的意义。
As the E31 oilfield developed by injection, it has entered the development stage of high and medium water content. With the continuous development of oilfield waterflooding, the water content in the oilfield is continuously rising and the relationship between oil and water is further complicated. The contradiction between layers, layers and planes in the oilfield is exacerbated. High water cut wells increased year by year, steady production more difficult. The flooding of the main layer of the oilfield is serious, and the utilization of the non-main layer is inferior. At present, the measures to solve these major contradictions in reservoir development are mainly the profile control and flood control of water wells and the water blockage of high-water-cut oil wells. Gas field E31 reservoir, the average formation temperature of 126 ℃, formation water salinity is relatively high, conventional polymer gel profile control agent in the high temperature, high salinity conditions, prone to gel breaking, degradation and so on , The stability of the gel system is poor, the effective period is short, water control and oiling effect is not significant. Therefore, research and development of a movable gel profile control and drive system for the E3 reservoir of Gas is of great significance for reducing the liquid cost of the construction, improving the gelation stability of the weak gel, promoting large-scale profile control and flood control technologies, Water injection development effect, with special significance.