摘要
定性研究了预交联凝胶颗粒对裂缝性低渗透油藏的封堵性能。通过裂缝岩心流动实验,明确了颗粒的强度、韧性、颗粒粒径与裂缝宽度的匹配关系、颗粒的悬浮性、粘弹性对裂缝性低渗透油藏封堵效率的影响,提出运移临界压力梯度和破裂临界压力梯度的大小是颗粒使深部液流转向的重要因素。
This article investigates the behavior of pre-crosslinked gel particles in sealing fractured and low-permeability oil reservoir,inspects the relationship between particle intensity,toughness,size and fracture width,and the impact of pellet aerosol and viscoelasticity on the seal-off behavior through fractured core flow test.It is puts forward that the size of critical pressure gradient of particle motion and particle burst is the important cause of in-depth fluid diversion.
出处
《特种油气藏》
CAS
CSCD
2006年第4期92-93,103,共3页
Special Oil & Gas Reservoirs
关键词
预交联凝胶颗粒
裂缝大孔道
封堵效率
运移临界压力梯度
破裂临界压力梯度
pre-crosslinked gel particle
large pore
seal-off effect
critical pressure gradient of particle motion
critical pressure gradient of particle burst
