本文關(guān)鍵詞：聚合物微球油藏適應(yīng)性評(píng)價(jià)方法及調(diào)驅(qū)機(jī)理研究　出處：《石油化工》2017年07期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 大慶油藏 聚合物溶液 聚合物微球 粒徑分布 儲(chǔ)層適應(yīng)性 驅(qū)油效果 機(jī)理分析

【摘要】：以大慶油田儲(chǔ)層和流體物性為模擬對(duì)象,采用注入壓力、含水率和采收率等評(píng)價(jià)指標(biāo),對(duì)聚合物微球油藏適應(yīng)性評(píng)價(jià)方法及調(diào)驅(qū)機(jī)理進(jìn)行研究。實(shí)驗(yàn)結(jié)果表明,隨著水化時(shí)間的延長(zhǎng),微球吸水膨脹倍數(shù)(Q)增加,初期膨脹較快,之后膨脹減緩。與SMG_W相比,SMG_Y的Q增長(zhǎng)較慢,Q較小。與聚合物相分子聚集體尺寸相比,SMG_W和SMG_Y微球狀態(tài)粒徑分布范圍都較窄,具有更大的不可及孔隙體積。聚合物微球SMG_W和SMG_Y通過(guò)巖心時(shí),壓力達(dá)到穩(wěn)定時(shí)的巖心滲透率極限值為237×10~(-3)μm~2和712×10~(-3)μm~2。聚合物微球調(diào)驅(qū)的調(diào)驅(qū)機(jī)理與聚合物驅(qū)不同,微球進(jìn)入較大孔隙滯留和產(chǎn)生封堵作用,水進(jìn)入較小孔隙發(fā)揮驅(qū)油作用。微球恒壓實(shí)驗(yàn)的采收率增幅大于恒速實(shí)驗(yàn)的值,聚合物微球調(diào)驅(qū)(模型Ⅳ)的增油效果要優(yōu)于聚合物驅(qū)(模型Ⅱ)的增油效果。
[Abstract]:Taking the reservoir and fluid physical properties of Daqing Oilfield as simulation object, the adaptability evaluation method and mechanism of polymer microsphere reservoir are studied by using injection pressure, water cut and oil recovery. The experimental results show that. With the prolongation of hydration time, the water swelling multiple (Q) of microspheres increased, the initial expansion was faster, and then the expansion slowed down. Compared with SMG_W, the Q of SMGY increased more slowly. Compared with the size of polymer phase molecular aggregates, the particle size distribution of SMGW and SMG_Y microspheres is narrower than that of polymer phase molecular aggregates. Has a larger unreachable pore volume. Polymer microspheres SMG_W and SMG_Y pass through the core. When the pressure reaches stability, the core permeability limit values are 237 脳 10 ~ (-3) 渭 m ~ (-2) and 712 脳 10 ~ (10 ~ (-3)) 渭 m ~ (-2) 路m ~ (2) respectively. The mechanism of polymer microsphere modulation flooding is different from that of polymer flooding. Microspheres enter larger pores and produce plugging effect, while water enters smaller pores to play the role of oil displacement. The increase of recovery factor of microsphere constant pressure experiment is larger than the value of constant velocity experiment. The oil increasing effect of polymer microsphere controlled flooding (model 鈪，

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