柔性深部液流转向剂SR-3的力学性能  

Mechanical Properties of Soft Crosslinked Polymer as Fluid Diverting Agent SR-3

作　　者：马红卫[1] 刘玉章[1] 熊春明[1] 李宜坤[1] 唐孝芬[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《油田化学》2008年第1期67-70,共4页Oilfield Chemistry

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℃.

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 

分 类 号：TE39[石油与天然气工程—油气田开发工程] O631.21[理学—高分子化学]