一种驱油用高稳定性多糖类聚合物的物理性能

发布时间：2018-06-04 13:07

本文选题：多糖类聚合物 + 物理性能　；参考：《油田化学》2017年01期

【摘要】：针对高温高盐油藏化学驱的技术需要,研究了一种新型多糖类聚合物SH-1的物理性能,包括流变性、增稠效果、耐盐抗温性能、机械稳定性以及在多空介质中的流动性,并在此基础上评价了该聚合物在三次采油技术中的应用潜力。结果表明:SH-1相对于相对分子质量800万、水解度5%的部分水解聚丙烯酰胺(HPAM)具有更好的增稠效果,质量分数0.5%的HPAM溶液和质量分数0.1%的SH-1溶液的黏度(25℃,10 s~(-1))基本相同,约为100mPa·s。随着盐度的增加,HPAM溶液的黏度明显降低;而SH-1溶液的黏度基本不变,表现出良好的耐盐性。与HPAM溶液相比,SH-1溶液黏度随温度升高而下降的幅度较小,表现出较好的耐温性能。在高剪切速率下SH-1溶液的黏度损失明显小于HPAM溶液,注入速度为20 mL/min时,HPAM溶液黏度损失达65%,而SH-1溶液的黏度损失仅为12%。同时,SH-1还具有较好的注入性和流动控制能力,由于分子链硬度大,SH-1在多孔介质中(130×10~(-3)μm~2左右)的滞留量大于HPAM。SH-1在高温高盐高渗透率油藏驱油方面具有应用潜力。
[Abstract]:In order to meet the technical requirements of chemical flooding in high temperature and high salt reservoirs, the physical properties of a new type of polycarbohydrate polymer SH-1 are studied, including rheology, thickening effect, salt resistance and temperature resistance, mechanical stability and fluidity in porous media. On this basis, the application potential of the polymer in tertiary oil recovery technology was evaluated. The results showed that the viscosity of HPAM solution with 0.5% mass fraction and 0.1% SH-1 solution was almost the same as that of SH-1 solution with relative molecular weight of 8 million and hydrolysis degree of 5%, which was about 100mPa s. With the increase of salinity, the viscosity of HPAM solution decreases obviously, while the viscosity of SH-1 solution is basically unchanged, showing good salt tolerance. Compared with HPAM solution, the viscosity of SH-1 solution decreases slightly with the increase of temperature, and shows better temperature resistance. At high shear rate, the viscosity loss of SH-1 solution is obviously smaller than that of HPAM solution. The viscosity loss of SH-1 solution is 65 and that of SH-1 solution is only 12 at 20 mL/min injection rate. At the same time, SH-1 also has good injection and flow control ability. Because of its high molecular chain hardness, the retention of SH-1 in porous media is about 130 脳 10 ~ (-3) 渭 m ~ (-2), which is larger than that of HPAM.SH-1 in high temperature, high salt and high permeability reservoirs, and it has the potential to be applied to oil displacement in high temperature, high salt and high permeability reservoirs.
【作者单位】：西南石油大学油气藏地质及开发国家重点实验室;
【基金】：中石油创新基金“基于纳米纤维素活性驱油剂的制备及驱油机理研究”(项目编号2015D-5006-0212)
【分类号】：TE39

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