气井残酸返排规律研究——以普光气田为例

Regularity research of residual acid flowback of gas wells——Take the Puguang gasfield as an example

针对普光气田主体生产井,在分析储层岩性及酸化压裂液基础上,对返排液离子浓度变化规律和生产液气比变化情况进行分析,总结出了残酸返排规律,提出了判别残酸返排基本结束的判别值,这对掌握气井残酸返排情况,为分酸分离器的轮换使用提供了及时可靠的依据,加快了气田生产运行效率,同时可指导新区块气井生产。

Aiming at the main production wells of Puguang gasfield, based on the analysis of reservoir lithology and acidizing fracturing fluid, the ion concentration regularity of flowback liquid and production liquid-gas ratio variance have been analyzed. And then the residual liquid flowback regularity has been summarized and the discrimination value to judge whether the residual liquid flowback is over has been provided, which is good for mastering residual liquid flowback, providing reliable guidance for rotation using of acid separator, speeding up the gas production efficiency, and at the same time providing guidance for gas well production of new blocks.