摘要
在蒸汽吞吐过程中，加入溶剂是一种新的热力采油方法。通过对冷家堡油田稠油组分及元素分析，选出Ａ、Ｂ、Ｃ、Ｄ四种溶剂，其中Ｂ、Ｃ、Ｄ三种降粘效果较好，经室内试验，选用Ｃ、Ｄ两种复配使用，其最佳配比为２∶３。利用四因子水平正交试验确定基本配方为：２０％Ｓ＋１％Ｆ＋０．２％Ｈ。通过岩心流动试验，证实该配方的溶剂使渗透率损失很小，不会产生胶质、沥青沉淀；物模试验认为蒸汽加溶剂吞吐技术，可以提高稠油的蒸汽吞吐效果和采收率，并给稠油集输与储运也带来了很大方便。
Adding solvent is a new thermal recovery method during steam stimulation process.Through analysis of heavy oil component and its element in Lengjiapu oilfield,four kinds of solvent(A,B,C and D) are selected.Among which,B,C and D are better for viscosity reduction.After indoor testing ,C and D are selected to be used together,and their best formula ratio is 2∶3.According to experiment of horizontal quadrature of four factors ,the basic formula is defined as 20%S+1%F+0.2%H.Through flowing test in the core,it is confirmed that this solvent formula makes very little loss of permeability and wont generate precipitation of gum and asphaltine;physical modelling shows that steam stimulation with solvent adding can increase heavy oil steam stimulation efficiency and recovery efficiency,and make it much convenient for gathering ,transferring and storing of heavy oil.
出处
《特种油气藏》
CAS
CSCD
1995年第2期48-53,共6页
Special Oil & Gas Reservoirs
