为了治理华北油田砂岩油藏油水井的窜漏,研制了一种高渗入性的可固化合成树脂基封窜堵漏剂,该剂基本配方如下:60%~80%改性酚醛树脂+5%~25%不饱和聚酯树脂+1%~3%固化剂+1%~5%促进剂+5%增塑剂+5%增强剂+其他添加剂。根据地层温度(40~110℃)配制的8个配方封窜堵漏剂,在各该温度下的固化反应开始时间(由粘时曲线测定)可延迟3~8小时,固化后的抗拉强度为12.5~10.8 MPa,抗压强度为13~87 MPa,抗剪切强度为20.0~9.2 MPa,在10%盐酸、10%NaOH溶液1、0%NaCl溶液中浸泡24 h的溶蚀率<1%,与砂混合固化后,射孔弹穿透深度远小于水泥石。自2001年以来使用该剂在华北油田3口油井实施封层、2口油井实施封窜,其中包括储层渗透性很低的井和套管补贴后失效的井,封堵率均为100%,施工后的井生产中承压14~19MPa,已正常生产1~3年。图8表2参3。 In order to control the blow-by of oil and gas wells in the sandstone reservoirs of Huabei Oilfield, a highly intrusive curable synthetic resin-based sealing channeling plugging agent was developed. The basic formulation of the agent is as follows: 60% -80% modified phenolic resin + 5% ~ 25% unsaturated polyester resin + 1% ~ 3% curing agent + 1% ~ 5% accelerator + 5% plasticizer + 5% enhancer + other additives. According to the formation temperature (40 ~ 110 ℃) prepared eight formulations sealing channeling plugging agent, the curing reaction at each temperature start time (measured by the adhesion curve) delay of 3 to 8 hours after curing tensile strength The compressive strength was 13 ~ 87 MPa and the shear strength was 20.0 ~ 9.2 MPa. The dissolution rate of the solution in 10% hydrochloric acid, 10% NaOH solution and 1% NaCl solution for 24 h was less than 1% After mixing with sand, the perforation penetration depth is much smaller than that of cement stone. Since 2001, this agent has been used to seal three oil wells in Huabei Oilfield and two oil wells have been sealed, including those wells that have low reservoir permeability and failed casing after casing subsidies. The plugging rates are both 100% After construction, the production pressure in the well is 14 ~ 19MPa, which has been normally produced for 1 ~ 3 years. Figure 8 Table 2 Reference 3.