改善稠油渗流流变性的试验  

Experimental study of improving rheological characteristics of heavy oil's percolation flow

作　　者：王步娥[1] 郑惠光[1] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083

出　　处：《石油与天然气地质》2005年第3期370-373,共4页Oil & Gas Geology

基　　金：中国石油化工集团公司油田开发先导试验项目(YTB1999)

摘　　要：稠油的非牛顿性质是造成稠油油藏采油速度低、采收率低的一个重要原因.ZHSS-01表面活性剂体系能在较宽的温度范围(30～71℃)、较高的矿化度(16×104mg/L)和较高硬度(1.1×104mg/L)条件下,与稠油形成水包油型乳状液,降粘效率达98％以上,有效地改善了稠油在井周地带的渗流流变性,降低了稠油在近井地带的渗流阻力,提高开采速度.试验表明,应用ZHSS-01表面活性剂进行驱油可提高采收率3%以上.Non-Newtonian flow characteristic of heavy oil is the main reason resulting in low oil recovery rate and low recovery factor in heavy oil reservoir.ZHSS-01 surfactant system can form reverse emulsion when it is mixed with heavy oil in the reservoir in a relatively wide range of temperature(30-71℃),relatively high salinity(16×10~4 mg/ L)and relatively high hardness of water (1.1×10~4 mg/L),which would lead to a viscosity breaking effectiveness of over 98%.As a result,the rheological characteristics of percolation flow of heavy oil around the wellbore can be im- proved,fihrational resistance of heavy oil in the vicinity of the wellbore is lowered,and oil production rate is in- creased.Experimental study shows that recovery factor can be enhanced over 3 % when heavy oil being displaced with ZHSS-01 surfactant system.

关 键 词：渗流力学 流变性 表面活性剂 稠油 

分 类 号：TE313.7[石油与天然气工程—油气田开发工程]