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机构地区:[1]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500
出 处:《油田化学》2008年第1期60-62,共3页Oilfield Chemistry
摘 要:根据形成的CDG黏度(60℃),M:1.0×10^6、HD=25%、疏水基含量0.25%的疏水缔合聚合物AP-P4与柠檬酸铝在矿化度44.8g/L的模拟地层盐水中在60℃下形成CEG的条件为:聚合物浓度100~300mg/L,聚交比20~150,最佳聚交比100,成胶时间2~7天;聚合物浓度≥400mg/L时发生分子间交联。在Kw为0.2~1.0μm^2的人造砂岩岩心中,聚合物浓度300mg/L的AP—P4型CDG产生的阻力系数为59.01~23.89,残余阻力系数为43.28~15.96,而相应的职AM型CDG则分别为41.67~18.63和30.58~9.03;在K。为0.20~0.23μm^2的人造岩心中,AP-P4型和HPAM型CDG的最高封堵率分别为94%和78%。在渗透率级差分别为12.72和4.65的两组并联双岩心组上,水驱后注入0.5PVAP-P4型CEG使采收率分别提高16.0%和13.8%。在高盐条件下疏水缔合聚合物CDG的调驱性能优于HPAM型CDG。图3表3参3。The conditions of colloidal dispersion gel, CDG, formed from a hydrophobically associating polymer, AP-P4, of M = 1.0×10^6, HD= 25%, and cationization degree= 0.25% and an aluminum citrate preparate in a simulation formation brine of TSD = 44. 8 g/L at 60℃ are investigated on the basis of gel viscosity determinations at 60℃ and following parameters are obtained: polymer concentration l(K)-300 mg/L, polymer to crosslinker ratio 20-150 and its optimal value 100, gelation time 2--7 days; intermolecular crosslinking takes place at polymer concentration ≥400 mg/L. In artificial sandstone cores of Kw 0.2--1.0 μm^2, the resistance factor, RF, and the residual resistance factor, RRF, creacted by AP-P4's CDG of polymer concentration 300 mg/L are of 59.01-- 23,89 and 43. 28--15. 86 and byHPAM's CI3G of 41. 67--18, 63 and 30 . 58--9. 03 , respectively; for cores of Kw0.20---0.23 μm^2, the maximal plugging rate of AP-P4's and HPAM's CDGs is of 94% and 78%, respectively. On two sets of parallel lower and higher permeability cores with permeability variation factor 12.72 and 4.65 after water flood completed, injecting 0.5 PV of AP-P4's CDG leads to an enhancement in oil recovery of 16.0 % and 13.8 %, respectively. In profiling/flooding capability the hydrophobically associating polymer CGD of higher salinity is superior to corresponding HPAM's CDG.
关 键 词:疏水缔合聚合物 柠檬酸铝 胶态分散凝胶(CDG) 应用性能 高盐度 调驱剂
分 类 号:TE39[石油与天然气工程—油气田开发工程] O648.17[理学—物理化学]
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