摘要
黏弹自调控剂分子更接近线性,其具有的黏弹特性,能实现优势通道增黏,低渗通道变稀,动用低渗透层剩余油。在低渗透层状油藏试验均表现出增油降水效果,进一步扩大了黏弹自调控技术的应用范围。黏弹可以有效治理水驱优势方向,动态改变地下微压力场,注入压力曲线呈现四种形态,反应出黏弹驱的渗流特点。注入速度越高,高、低渗采出端压力接近,提高初期注入排量,能够提高低渗层油流速度,提升驱油效果。不同含水率、产液阶段增油降水存在差异,含水率大于60%,液量大于2.5 m~3,增油降水效果好。
The viscoelastic self-regulating agent molecule is closer to linear,and its viscoelastic characteristics can achieve the viscosity of the dominant channel,the thinning of the low-permeability channel,and the use of the remaining oil in the low-permeability layer.In the low permeability layered reservoir test,the effect of increasing oil and precipitation was exhibited,which further expanded the application range of viscoelastic self-regulation technology.Viscoelastic can effectively control the dominant direction of water flooding,dynamically change the underground micro-pressure field,and the injection pressure curve presents four forms,reflecting the seepage characteristics of viscoelastic flooding.The higher the injection velocity,the pressure at the production end of high and low permeability is closer,and the initial injection displacement can be increased,which can increase the oil flow velocity of the low permeability layer and improve the oil displacement effect.There are differences in oil and precipitation in different rate of water content and liquid production stages,the water content is greater than 60%,the liquid volume is greater than 2.5 m3,and the precipitation and oil increase effect is good.
作者
刘军全
宁定华
万奇峰
王学峰
LIU Junquan;NING Dinghua;WAN Qifeng;WANG Xuefeng(Oil Production Plant 7 of PetroChina Changqing Oilfield Company,Xi'an Shaanxi 710200,China)
出处
《石油化工应用》
2025年第4期58-61,共4页
Petrochemical Industry Application
关键词
黏弹
注入速度
压力特征
差异
viscoelastic
injection speed
pressure characteristics
differences
