姬塬长8油藏泡沫酸酸化技术研究及应用

Research and Application of Foamed Acid Acidation for Jiyuan Chang8 Position

针对姬塬长8部分注水井呈现整体投注压力相对较高,正常注水后注水压力上升速度过快,注水系统压力大,提出了泡沫酸酸化工艺。该酸液具有液柱压力低、返排能力强、黏度高、滤失小、对地层损害小、酸液有效作用距离长等优点。在室内对泡沫酸配方、酸液体系进行评价试验研究,首次现场试验,根据实验结果对工艺进行了改进,目前已在现场成功试验5口井,取得了较好的增产效果。

Aimed at the overall betting pressure of Jiyuan Chang8 position for injection wells is relatively high, normal water pressure rises too fast after the injection, the pressure of water injection system is big, raised bubble acidifying process. The results indicated that the acid has a low pressure liquid column, flowback ability, high vis- cosity, filtration small, small formation damage, acid effective distance and long. Research on foamed acid formu- lations, acid system evaluation tests conducted research, the first field test, according to the results of the process has been improved, has been successfully tested at the scene five wells and achieved good yield.