注水井带压作业环氧树脂堵剂研究

Research on Epoxy Plugging Agent for Snubbing Service of Water Injection Well

为了探索适合于注水井带压作业的化学堵剂,理论分析了其环境因素及自身要求,提出了化学堵剂(CPA)的设计思路,并通过室内实验对设计的化学堵剂进行评价。结果表明,以环氧树脂E-44体系为主剂的化学堵剂CPA(E-44、活性稀释剂660 A、密度调节剂TJ-182的质量比为100∶5∶210)的适用期随着固化剂JZ-6加量或温度的增高而快速下降,尤其是温度较高时更显著;在井底温度为50℃率70℃时,CPA更适合于温度梯度较大的注水井。当固化剂加量为10%、封堵长度为3.0 m时,CPA适用期达到4.7 h(25℃),最大承压强度可达26.51 MPa。

In order to explore the chemical plugging agent(CPA)which was suitable for snubbing service of water injection wells,environment factors and their own requirements of CPA were analyzed theoretically. Then,the design of CPA was put forward and the evaluation of the designed CPA was carried out through laboratory experiment. The results indicated that the applicable time of CPA,containing epoxy resin E-44,reactive diluent 660 A and Density regulator at the mass ratio of 100∶5∶210,fell fast as the amount of curing agent or the temperature increased,especially in the condition of the higher temperature. The CPA was more suitable for the snubbing service of water injection well with larger temperature gradient when the temperature in bottom of well was between 50℃ and 70℃. When the adding amount of curing agent was of 10% and the length of CPA was of 3.0 m,the applicable time of CPA could reach 4.7 h(25℃)and the maximum of bearing strength almost reached 26.5 MPa.