【作者】 滕学伟；

【导师】 张艳玉；

【作者基本信息】 中国石油大学 ， 油气田开发工程， 2009， 硕士

【摘要】 目前,我国强化采油主要依靠化学驱,其中聚合物驱所占比例较高。然而聚合物驱后仍有大量的剩余油存在。为了维持我国石油工业的持续发展,迫切需要研究聚合物驱后如何进一步提高采收率的技术和方法。本文通过建立聚合物驱的概念模型,研究了油藏参数(油层纵向非均质、大孔道、垂向渗透率、油层平均渗透率、油层厚度、油层韵律性、原油粘度、油层温度)、聚合物性质参数(残余阻力系数、可及孔隙体积系数、吸附)、注聚参数(注入时机、聚合物用量、聚合物浓度、注入速度)和井网井距对聚合物驱油效果的影响规律,并以产出投入比为依据,运用正交设计的方法对聚合物浓度、聚合物用量和注入速度三个因素进行正交优化,得到聚合物驱最优方案。然后在分析聚合物驱后的剩余油分布规律后,对聚合物驱后的二次注聚、交联聚合物驱和聚合物表面活性剂二元驱三种提高采收率技术分别进行影响因素分析和参数优化设计,最后通过比较二次注聚、注交联聚合物驱和聚合物表面活性剂二元驱三种技术的最优方案,优选聚合物驱后的提高采收率技术。结果表明,交联聚合物驱是聚合物驱后较优的提高采收率技术。更多还原

【Abstract】 At present, enhanced oil recovery mainly depend on chemical flooding in China, one of the higher proportion is polymer flooding. However there are still many remaining oil exist after polymer flooding. In order to maintain the sustainable development of the petroleum industry in China, there is an urgent need to study further enhanced oil recovery techniques and methods after polymer flooding.This paper researches the reservoir parameters (reservoir vertical heterogeneity, large pore, vertical permeability, average reservoir permeability, reservoir thickness, reservoir rhythmic, crude oil viscosity, oil temperature), polymer nature (residual resistance coefficient, accessible pore volume coefficient, absorption), polymer parameters (injection timing, polymer dosage, polymer concentration, injection rate), well pattern and well spacing on the effect of polymer flooding through the establishment of the polymer flooding concept model. And based on outputs than inputs, polymer concentration, polymer dosage and the injection rate of these three factors are orthogonal optimization by the use of orthogonal design method, thus, the best polymer flooding program has been got. Then, in the analysis of remaining oil distribution after the polymer flooding, the influencing factors and the parameter optimization of the second polymer, cross-linked polymer flooding and polymer surfactant flooding are studied after polymer flooding. At last,the enhanced oil recovery technology after polymer flooding are optimized by comparing the best programs of the second polymer, crosslinked polymer injection and polymer surfactant flooding technology. The results showed that crosslinking polymer flooding are better enhanced oil recovery technology after polymer flooding.更多还原