發(fā)布時(shí)間：2019-04-23 18:47

【摘要】：目前深部調(diào)驅(qū)技術(shù)注重于儲(chǔ)層宏觀非均質(zhì)性的調(diào)整,但特高含水期剩余油的分布更加零散,賦存方式以多孔型(孔隙半徑約在5~25μm之間)為主,本文從打破油水微觀平衡、擴(kuò)大微觀波及體積的角度出發(fā),研究了微觀油水調(diào)控體系,取得多項(xiàng)有意義的研究成果:針對(duì)勝利油田勝二區(qū)地層地質(zhì)條件,本文篩選優(yōu)化出一種由B1(烷基酚聚氧乙烯醚羧酸鹽型表面活性劑)和A2(酯鹽型表面活性劑)組成的微觀油水調(diào)控體系,當(dāng)實(shí)驗(yàn)溫度為80℃時(shí),微觀油水調(diào)控體系(2000mg·L-1B1+2000mg·L-1A2)滲透進(jìn)入巖心孔隙能力強(qiáng),在輕微外力作用下,就能從油砂表面剝離原油,使其分散進(jìn)入水相,洗油效率可達(dá)81.05%;該體系在水驅(qū)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%,具有較好的控水增油效果;該體系分散原油,得到粒徑范圍分布較廣的液滴,粒徑小于5μm、15~35μm兩個(gè)范圍內(nèi)的液滴居多,液滴之間通過(guò)架橋聚并的形式形成更大油滴或油帶;該體系能使油滴滯留在半徑大于24.98μm左右的孔隙內(nèi),最為有效地驅(qū)替了半徑在6.43~24.98μm孔隙區(qū)間的剩余油,同時(shí)具有“調(diào)”和“驅(qū)”的功能,達(dá)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，

本文編號(hào)：2463705