缔合聚合物驱在鲁克沁中区油藏的可行性研究  

Feasibility Study of Associated Polymer Flooding in Lukeqin Reservoir District

作　　者：刘清栋 王晓燕[1] 曹少余 王崇先[1] 姚普勇[1] 

机构地区：[1]吐哈油田公司工程技术研究院,新疆鄯善838202 [2]吐哈油田公司鲁克沁采油厂,新疆鄯善838202

出　　处：《油田化学》2017年第1期108-112,142,共6页Oilfield Chemistry

基　　金：吐哈油田公司"鲁克沁中区缔合聚合物驱技术研究"(项目编号GCYHZC20131023061)

摘　　要：针对鲁克沁中区油藏非均质性严重、水油流度比大和地层水矿化度高的特点,研究了疏水缔合聚合物AP-P8在该油藏条件下的黏度、溶解性、抗剪切性和热稳定性,考察了AP-P8的驱油性能,并在现场进行了应用。研究结果表明,配液水为注入水(矿化度约80 g/L)、温度为78℃时,AP-P8的增黏性能明显好于常规聚合物,AP-P8溶液黏度随温度升高而降低,用注入水配制的2 g/L AP-P8溶液在100℃时的黏度为64.5 mPa·s;室温下AP-P8在注入水中的溶解性较好,溶解时间为2.8 h;AP-P8抗剪切性较好,2.5 g/L AP-P8溶液剪切后的黏度保留率为54.2%。随AP-P8浓度的增加,岩心阻力系数和残余阻力系数增加,有利于提高原油的采收率;AP-P8可在水驱基础上提高稠油采收率10.2%;现场试注试验结果表明,AP-P8的注入性良好,常温配液黏度为100 mPa·s,注聚稳定压力27.5 MPa。AP-P8满足鲁克沁中区油藏条件对聚合物驱性能的要求,应用时可以直接用注入水配液。Aiming at the characteristic of Lukeqin heavy oil reservoir, including serious geological heterogeneity, unfavorable water-oil mobility ratio, and high formation water salinity, the viscosity, solubility, shear resistance and thermal stability of the hydrophobic association polymer, AP-P8, was researched. The oil displacement performance of AP-P8 was studied, and field application was carded out. The results showed that the viscosity of AP-P8 was significantly better than that of conventional polymers when the preparing water was injection water with 80 g/L mineralization and the temperature was 78℃. The viscosity of AP-P8 solution decreased with the increase of temperature. The viscosity of 2 g/L AP-P8 solution was 64.5 mPa - s when the temperature was 100℃ and the preparing water was injection water. The solubility of AP-P8 was good at room temperature, and the dissolution time was 2.8 h. The retention rate of shear viscosity was 54.2% when the mass concentration of AP-P8 was 2.5 g/L, indicating good shear resistance. With increasing concentration of AP-P8, the core resistance coefficient and residual resistance coefficient increased, which was conducive to improve oil recovery. AP-P8 polymer could increase oil recovery by 10.2% on the basis of water flooding. Field test results showed that the injection of AP-P8 was good with 100 mPa-s solution viscosity at room temperature and 27.5 MPa polymer injection pressure. AP-P8 met the flooding performance requirements of Lukeqin central reservoir conditions, which could be directly prepared by injection water.

关 键 词：高盐稠油油藏 缔合聚合物驱 提高采收率 鲁克沁油藏 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]