G702-HZ固体缓蚀阻垢棒在油井中的应用

Application of Solid Corrosion and Scale Inhibition Rods in Oil Wells

在油田开发过程中,特别是油田进入中后开发期油井井筒腐蚀结垢日益严重,管杆腐蚀断裂、漏失,结垢使抽油泵、,严重影响了油井产能的正常发挥。在油井油套环加入缓蚀剂和阻垢剂作为一种抑制或减缓腐蚀结垢的有效手段,目前得到了广泛应用。但液体药剂普遍存在损耗量大、保护周期短、保护范围小、加药工艺复杂等缺点。探索试验了一种井下用固体缓蚀阻垢棒,检泵时直接投加到尾管下连接的花管内,使其成分随采出液缓慢、匀速释放,不伤害地层,有效期长,对减轻油井井筒腐蚀结垢有明显效果。

In the oil field development process, especially development mid and late stage, the wellbore corrosion of oil wells is increasingly serious, rod and tubing often form corrosion cracking and leakage, which can seriously affect normal fimctioning of well productivity. Adding corrosion inhibitor and scale inhibitor in the oil ring of oil wells as an effective means to restrain the corrosion and scaling has been widely applied. However, there are many shortcomings in above process, such as big consumption of the liquid reagent, short protection cycle, small protection scope, complex dosing process. In this paper, a downhole solid corrosion and scale inhibition rod was tested and explored. During pump inspection, the solid corrosion and scale inhibition rod was directly fixed in preforated tube connected to the tail pipe, so that corrosion and scale inhibitor released slowly and uniformly, which can not harm the strata, and can reduce oil corrosion and scaling of the well borehole.