摘要
液流转向剂SR-3是一种柔性的交联聚合物颗粒，在HPAM溶液中的悬浮体用于储层深部调剖。实验考察了SR-3的多项力学性能，结果如下。SR-3在单轴拉伸中发生屈服及延性断裂；在单轴压缩中不破裂；在动态剪切中特别是高温下（70--90℃）易发生屈服及塑性流动；G’值高，约在2200Pa上下，随温度变化辐度小，G”值低，约在200--400Pa范围，随温度变化幅度大，应力超过约600--800Pa时或温度高于70℃后G’急剧下降，G”急剧上升，发生塑性剪切流动；在拉伸蠕变和恢复测试中，瞬时弹性变形所占比例很大，可恢复的推迟弹性变形（黏弹性变形）所占比例较小，残余变形随拉伸应力增大而迅速增大。SR-3颗粒剂弹性大，强度高，变形能力强，易发生蠕变，在90℃高温下也可使用。图8表1参9。
Fluid diverting agent SR-3, or soft beads, is a particulated soft, tuber-like crosslinked polymer and is used in suspension in HPAM solution for indepth reservoir permeability profile modification. A lot of mechanical properties of SR-3 is investigated experimentally and fllowing results are obtained. SR-3 undergoes yielding and ductile rupture in uniaxial stretching, does not rupture in uniaxial compression, and is liable to yield and flow, in particular, at higher temperatures, 70---90℃, in dynamic shearing. Its G＂ value is high, being of about 2200 Pa, and its G＂ value is low, being in range 200----400 Pa; G＂ value varies in a small range and G＂ value in a larger range when the temperature rises from 30℃ to 90℃ ; G＇ value dramatically decreases and G＂ value increases when the applied stress exceeds a value of about 600---800 Pa or the temperature is higher than 70℃, which indicates plastic shear flow occured. For SR-3 in tensile creep-recovery, the instantaneous elastic deformation plays a principle role and the recoverable delayed elastic deformation, or time dependent viscoelastic deformation -- much less important role; the residual unrecovered deformation, or perrnanent set, becomes notable only when the applied stress is large. Particulated soft material SR-3 possesses high elasticity, strength, and deformability, is easy to creep and can also be used at higher temperature of 90℃.
出处
《油田化学》
CAS
CSCD
北大核心
2008年第1期67-70,共4页
Oilfield Chemistry
关键词
颗粒剂
柔性交联聚合物
液流转向剂(深部调剖剂)
力学性能
应力
应变关系
储能模量
损耗模量
蠕变
恢复性能
particulated material
soft crosslinked polymer
fluid diverting agent （ indepth profiling agent ）
mechanical properties
stress/strain relationships
storage moduls G＇
loss modulus G＇
creep-recovery
