摘要
长春岭油田埋藏浅、地层温度低、原油含蜡量高,表现出开采难度大的特征。本文在大量室内实验基础上,对比分析了不同温度下的油水相对渗透率特征,研究了高含蜡原油流变性和黏土矿物对流体渗透的影响,认为黏土微粒提供的晶核加快了原油中蜡的析出。储层内原油析蜡导致孔喉半径减小、渗透率大大降低,造成近井带地层析蜡冷伤害。该类油藏可以采取热水驱或蒸汽驱的开采方式,该认识对高含蜡油田制定合理开发方案提供了重要理论依据。
Due to the shallow burial depth, low temperature and high wax content, the Changchunling oilfield shows the characteristics of difficult development. On the basis of lab experiments, this article ana- lyse the phase permeability characteristics of high-temperature water flooding and steam flooding in differ- ent temperature conditions, and studies the influence of the rheological property of high wax crudes and day minerals on the fluid seepage characteristics. This study considers that the compositions of the clay minerals and clay particle provide crystal nucleus for the precipitation of the wax from crude oil. The pre- cipitation of wax reduces the radius of the pore throat, and results in greatly reducing of the reservoir per- meability. This further results in cold damage on wax in the near well bore. The reservoir can adopt water flooding or steam flooding exploitation method, this conclusion provided the important theoretical basis for making reasonable development scheme in high wax content oilfield.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第8期76-79,共4页
Periodical of Ocean University of China
基金
国家自然科学基金面上项目(多孔介质中原油析蜡机理及考虑岩石比表面的蜡沉积动力学模型)(41172109)
山东省自然科学基金面上项目(ZR2011DM009)资助
关键词
长春岭油田
原油析蜡
渗流
流变性
黏土微粒
Changchun oil field
wax deposit
percolation
rheological property
clay particles
