热固性树脂堵漏浆体系在长庆油田的应用

Application of Thermosetting Resin Plugging Fluid in Oil and Gas Wells

为提高桥塞堵漏材料之间的固结强度和堵漏材料在地层漏失通道的滞留能力,以非离子型环氧树脂和有机胺类热固结剂作为热固性树脂堵漏工作液基础,复配桥塞堵漏材料和悬浮增黏材料,建立了热固性树脂堵漏浆体系。室内研究了有机胺热固结剂加量和非离子型环氧树脂浓度对工作液固结状态、强度等固化效果的影响,确定了有机胺热固结剂和非离子型环氧树脂的加量范围,并对热固性树脂堵漏浆体系的固结时间、固结状态和固结强度进行了综合评价。实验表明,热固性树脂堵漏浆体系具有悬浮性高、漏层滞留性强、堵漏浆可固化、施工风险低等技术优势。在陇东致密油和苏里格致密气两口水平井治漏过程中,热固性树脂堵漏浆体系一次堵漏成功率高,表现出良好的堵漏效果。

In order to improve the consolidation strength of the bridge plug plugging materials and the retention capacity of the plugging materials in the formation leakage channel,the thermosetting resin plugging working fluid system was established by using the non-ionic epoxy resin and organic amine thermosetting agent as the basis of the thermosetting resin plugging working fluid,compounded with the bridge plug plugging materials and suspension viscosity increasing materials.The influence of the dosage of organic amine thermosetting agent and the concentration of non-ionic epoxy resin on the curing effect of the working fluid such as curing state and strength was studied in the laboratory,the dosage range of organic amine thermosetting agent and non-ionic epoxy resin was determined,and the consolidation time,consolidation state and consolidation strength of the thermosetting resin plugging system were comprehensively evaluated.The experimental results show that the thermosetting resin has the advantages of high suspension,strong retention of leakage layer,plugging slurry can be solidified and low construction risk.During the process of lost circulation control for two horizontal wells in Longdong tight oil and Sulige tight gas,with a high success rate of one-time plugging the thermosetting resin plugging shows good plugging effect.