本文選題：部分水解聚丙烯酰胺(HPAM) + 低黏纖維素　； 參考：《油田化學》2017年03期

【摘要】：為獲得高濃度高分子量聚合物與低黏纖維素共混堵漏體系的性能特征,采用應力控制流變儀、黏度計、掃描電子顯微鏡和凍膠閥承壓測試裝置等研究了高濃度、高分子量部分水解聚丙烯酰胺(HPAM)與低黏纖維素、醋酸鉻交聯(lián)劑、pH調節(jié)劑(Na HCO3)共混堵漏體系的黏彈性和固化后的承壓強度。結果表明,HPAM溶液的儲能模量隨相對分子質量的增加而增大;添加低黏纖維素與交聯(lián)劑可大幅提高HPAM溶液的黏彈性,體系黏度和固化后承壓強度均隨低黏纖維素加量的增加而增大;NaHCO_3可延緩體系交聯(lián)的速度,隨NaHCO_3加量增大,體系黏度和承壓強度略有降低。25 g/L HPAM+1500 mg/L低黏纖維素+100 mg/L醋酸鉻交聯(lián)劑+20 mg/L NaHCO_3體系的泵注性能良好,泵注時間90 min內的黏度控制在2 Pa·s以內;該體系耐鹽性良好,在70℃油藏溫度條件下固化后的承壓強度為0.5 MPa/m,滿足堵漏作業(yè)封堵性能要求。在L-357井堵漏施工中,擠注壓力最高達11.9MPa,擠入量6 m3,施工完成后對漏失層段試壓15 MPa,30 min內壓力保持不變。
[Abstract]:In order to obtain the properties of high concentration high molecular weight polymer and low viscosity cellulose blend, the high concentration of high concentration was studied by means of stress controlled rheometer, viscometer, scanning electron microscope and pressure test device of gel valve. The viscoelasticity and pressure-bearing strength of high molecular weight partially hydrolyzed polyacrylamide (HPAM) / low viscosity cellulose (LSC) and chromium-acetate crosslinking agent (NaHCO3) were studied. The results show that the storage modulus of HPAM solution increases with the increase of relative molecular weight, and the viscoelasticity of HPAM solution can be greatly improved by adding low viscosity cellulose and crosslinking agent. The viscosity of the system and the compressive strength after curing increased with the increase of the amount of low viscosity cellulose. NaHCO3 delayed the crosslinking of the system, and increased with the addition of NaHCO3. The viscosity and pressure-bearing strength of the system decreased slightly by .25g / L HPAM 1500 mg / L low viscosity cellulose 100mg / L chromic acetate crosslinking agent 20mg / L NaHCO-3 system. The pump performance of the system was good, and the viscosity within 90 min of pump injection time was controlled within 2 Pa / s, and the salt tolerance of the system was good. The pressure-bearing strength of the solidified reservoir at 70 鈩，

本文編號：2022347