微观油水调控体系调驱性能研究
发布时间：2019-04-23 18:47
【摘要】：目前深部调驱技术注重于储层宏观非均质性的调整,但特高含水期剩余油的分布更加零散,赋存方式以多孔型(孔隙半径约在5~25μm之间)为主,本文从打破油水微观平衡、扩大微观波及体积的角度出发,研究了微观油水调控体系,取得多项有意义的研究成果:针对胜利油田胜二区地层地质条件,本文筛选优化出一种由B1(烷基酚聚氧乙烯醚羧酸盐型表面活性剂)和A2(酯盐型表面活性剂)组成的微观油水调控体系,当实验温度为80℃时,微观油水调控体系(2000mg·L-1B1+2000mg·L-1A2)渗透进入岩心孔隙能力强,在轻微外力作用下,就能从油砂表面剥离原油,使其分散进入水相,洗油效率可达81.05%;该体系在水驱至含水98%后,仍可大幅度提高采收率,采收率增值大于20%,含水率最低降至76%,具有较好的控水增油效果;该体系分散原油,得到粒径范围分布较广的液滴,粒径小于5μm、15~35μm两个范围内的液滴居多,液滴之间通过架桥聚并的形式形成更大油滴或油带;该体系能使油滴滞留在半径大于24.98μm左右的孔隙内,最为有效地驱替了半径在6.43~24.98μm孔隙区间的剩余油,同时具有“调”和“驱”的功能,达到控水增油的目的。
[Abstract]:At present, the deep control and flooding technology pays attention to the adjustment of macro-heterogeneity of reservoir, but the distribution of remaining oil in ultra-high water cut period is more scattered, and the main occurrence mode is porous type (pore radius is about 5 ~ 25 渭 m). This paper breaks the micro-balance of oil and water in this paper. From the angle of expanding the microcosmic sweep volume, the microscopic oil-water control system is studied, and many meaningful research results are obtained: in view of the formation geological conditions in Shenger area of Shengli Oilfield, A micro-oil-water control system consisting of B1 (alkyl phenol polyoxyethylene ether carboxylate type surfactant) and A2 (ester salt type surfactant) was selected and optimized in this paper. When the experimental temperature was 80 鈩，
本文编号：2463705
[Abstract]:At present, the deep control and flooding technology pays attention to the adjustment of macro-heterogeneity of reservoir, but the distribution of remaining oil in ultra-high water cut period is more scattered, and the main occurrence mode is porous type (pore radius is about 5 ~ 25 渭 m). This paper breaks the micro-balance of oil and water in this paper. From the angle of expanding the microcosmic sweep volume, the microscopic oil-water control system is studied, and many meaningful research results are obtained: in view of the formation geological conditions in Shenger area of Shengli Oilfield, A micro-oil-water control system consisting of B1 (alkyl phenol polyoxyethylene ether carboxylate type surfactant) and A2 (ester salt type surfactant) was selected and optimized in this paper. When the experimental temperature was 80 鈩，
本文编号：2463705
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