新型综合增注剂LJ系列的研究与应用

APPLICATION OF NEW LJ SERIES OF COMPOSITE INJECTION INCREASE AGENT IN KERAMAYI OILFIELD

介绍了新型综合增注剂LJ系列的增注机理、性能、作用及其在克拉玛依油田、彩南油田等新老区块各类欠注井上的应用情况。现场施工57井次，有效率达98％以上。现场应用表明，LJ系列综合增注剂解除了吸水层堵塞，满足了地质配注要求，与压裂增注相比，具有解堵厚度大，适应于多个吸水层的特点。LJ系列综合增注剂有两大部分组成：预处理剂LJ—2具有很好的渗透分散作用；主处理剂LJ－3起到了防止粘土颗粒运移、膨胀及溶解水中微生物菌体、机械杂质的作用，达到疏通孔道之目的。

This paper introduces the injection increase mechanism, property and action of new LJ series of composite injection increase agent, introduces the application of them in the underinjected wells in both new and old blocks of Keramayi ollfield and Cainan Oilfield.The injection increase agent had been used for treating the underinjected wells for 57times,and the efficiency was more than 98%. The field application of the agent showed that it had removed the plug of the lnjection layers, satisfied the requirements of the injection allocation. Comparing with the method of fracturing and injection increase, it has the characteristics of removing plug of thicker layers and being suitable for several injection layers at the same time. The LJ series of composite injection increase agent is composed of 2 parts. Thepreconditioning agent LJ-2, which is with good permeableness and dispersion actions; andthe main conditioning agent LJ- 3, which can dredge the pores and throats by means of preventing the clay grains from migrating, swelling, and by means of dissolving themicroorganisms' body and injected particles in the water.