本文選題：聚合物　切入點(diǎn)：甘油　出處：《大慶石油地質(zhì)與開(kāi)發(fā)》2016年03期 　論文類(lèi)型：期刊論文

【摘要】：為了揭示聚合物驅(qū)油機(jī)理和驅(qū)油劑黏度大小與聚合物驅(qū)采收率增幅間關(guān)系,在"等黏"和"等濃"條件下測(cè)試了聚合物和甘油溶液增黏性、流變性、黏彈性和滲流特性,并在均質(zhì)和非均質(zhì)巖心上開(kāi)展了"等黏"甘油和聚合物溶液驅(qū)替效果以及它們注入先后順序?qū)︱?qū)替效果影響實(shí)驗(yàn)研究。結(jié)果表明,隨濃度增大,甘油和聚合物溶液黏度都增加,但聚合物增黏能力遠(yuǎn)強(qiáng)于甘油。隨剪切速率增加,甘油溶液視黏度保持恒定,聚合物溶液視黏度降低,表明前者為牛頓流體,后者為非牛頓流體。在"等黏"條件下,甘油和聚合物溶液阻力系數(shù)相差不大,但殘余阻力系數(shù)相差很大,表明甘油在多孔介質(zhì)內(nèi)滯留能力很差。在"等黏"條件下,"先聚合物后甘油"比"先甘油后聚合物"注入方式增油效果好,表明驅(qū)油劑在高滲透層內(nèi)滯留由此引起滲流阻力增加、全井注入壓力升高是促使液流轉(zhuǎn)向中低滲透層的動(dòng)力源泉,也是聚合物驅(qū)提高采收率的主要機(jī)理和聚驅(qū)過(guò)程中發(fā)生"剖面反轉(zhuǎn)"的根本原因。
[Abstract]:In order to reveal the relationship between polymer flooding mechanism and oil displacement viscosity and the increase of polymer flooding oil recovery, the viscosity enhancement, rheology, viscoelasticity and percolation characteristics of polymer and glycerol solution were tested under the condition of "equal viscosity" and "equal concentration". Experiments were carried out on homogeneous and heterogeneous cores to study the effect of "iso-viscosity" glycerol and polymer solution displacement and the sequence of their injection on the displacement effect. The results show that the viscosity of glycerol and polymer solution increases with the increase of concentration. With the increase of shear rate, the apparent viscosity of glycerol solution keeps constant, and the apparent viscosity of polymer solution decreases, indicating that the former is Newtonian fluid and the latter is non-Newtonian fluid. The resistance coefficient of glycerol and polymer solution is not different, but the residual resistance coefficient is very different. The results show that the retention ability of glycerol in porous media is very poor. Under the condition of "iso-viscosity", the injection of "first polymer then glycerol" is better than that of "glycerol after polymer" injection. The results show that the retention of oil displacement agent in high permeability layer will result in the increase of seepage resistance, and the increase of injection pressure in the whole well is the power source for the liquid flow to turn to the middle and low permeability zone. It is also the main mechanism of polymer flooding to improve oil recovery and the fundamental cause of profile reversal during polymer flooding.
【作者單位】： 東北石油大學(xué)提高油氣采收率教育部重點(diǎn)實(shí)驗(yàn)室;大慶頭臺(tái)油田開(kāi)發(fā)有限責(zé)任公司;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目“抗鹽型聚合物油藏適應(yīng)性及其改進(jìn)方法基礎(chǔ)研究”(51574086)資助
【分類(lèi)號(hào)】：TE357.46
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本文編號(hào)：1649542