塔河低幅大底水油藏中高含水期剩余油分布

为准确表征低幅大底水油藏高含水期剩余油富集特征,为油藏下一步调整指明方向。以塔河1区三叠系下油组为例开展精细数值模拟剩余油综合研究,目标油藏纵向上剩余油主要分布在油层顶部,平面上剩余油主要分布在构造高部位及井间。剩余油主要受构造、夹层、储层非均质、断层、井网、井型、沉积韵律等多种因素综合影响。针对低幅度大底水油藏剩余油的主要特点,氮气泡沫驱挖潜剩余油矿场试验取得了较好效果,未来可能成为此类油藏剩余油挖潜的主要方式。

Remaining oil distribution of low amplitude with great bottom water reservoir in high water cut stage in Tahe

In order to accurately characterize the residual oil features of large bottom water reservoir low amplitude high water period,to provide direction for the next step adjustment of reservoir. Use the lower oil position of Triassic 1 area of Tahe oilfield as an example to study the development of numerical simulation of remaining oil, target longitudinal remaining oil mainly distributes at the top of the reservoir, the plane of the remaining oil mainly distributes in the high position and well structure. The remaining oil mainly affected by structure, sandwich, reservoir heterogeneity, well pattern, well type, fault, sedimentary rhythm and other factors. Based on the main characters of residual oil in low amplitude large reservoir with bottom water, nitrogen foam flooding pilot test, and achieved good results, the future will become the main mode of this kind of reservoir potential of remaining oil in Tahe.