摘要
针对大庆外围低渗油田开发需要,开发应用了新型低伤害植物胶(苦苈胶KuLi)压裂液体系。压裂液流变学和静态悬砂实验结果表明,随着交联剂和低伤害植物胶浓度的增加,压裂液交联密度和交联强度逐渐增大,低伤害植物胶压裂液的剪切黏度η、平台模量Gp和零切黏度η0逐渐增加,悬砂效果越好。通过低伤害植物胶和羟丙基胍胶(HPG)压裂液的流变性能进行对比表明,低伤害植物胶压裂液的η、Gp和η0要优于羟丙基胍胶压裂液,这主要是由于低伤害植物胶的多侧基结构,使其交联性能更好。因此,利用流变参数Gp、η0并结合η可以对压裂液性能有更加深刻的认识,为压裂液的优化设计提供参考。
A new type low-damage vegetable gum-based(kuli gum)fracturing fluid system was developed and applied to meet the development needs of low permeability oilfield in Daqing.Fracturing fluid rheology and static solid-carrying experiment results showed that cross-linking density and strength rose gradually,shear viscosityη,plat-form modulus Gp,and zero shear viscosity170 increased gradually,and solid-carrying effect got better,as the density of cross-linking agent and low-damage vegetable♂im increased.This paper compared the rheological properties of low-damage vegetable gum-based fracturing fluid and the hydroxypropylguar gum-based fracturing fluid,which showed that theη,GP and 170 of the former were better than the latter.This was mainly due to the multi-side structure of low-damage vegetable gum that made the cross-linking property better.Therefore,more profound understanding of fracturing fluid property would be got by utilizing such rheological parameters as GP andη0 and combining them withη,which could be good reference for optimal design of fracturing fluid.
作者
肖丹凤
凌丽
Xiao Dan-feng;Ling Li(Oil Production Engineering Re-search institute of Daqing Oilfied Company Limited;No.5 Oil Production Plant of Daqing Oilfied Company Limited)
出处
《采油工程》
2012年第1期17-21,74,共6页
Oil Production Engineering
基金
国家自然科学基金项目“全三维水力裂缝在砂泥岩界面上扩展特性研究”(51004023)。
关键词
压裂液
平台模量
零切黏度
网络结构
沉降速度
fracturing fluid
platform modulus
zero shear viscosity
network structure
sedimentation velocity
