泡沫酸酸化在文明寨油田的应用

RESERVOIR ACIDIZATION WITH FOAMING ACID AT WENMINGZHAI OIL FIELDS IN ZHONGYUAN

本文针对文明寨油田井段长、渗透率高、层间矛盾突出、井况恶化、油井负压等特点，采用泡沫酸酸化工艺解除油层污染，实现泡沫暂堵高渗层，泡沫负压排酸，恢复油井产能，改善水驱开发效果。

The reservoirs at Wenmingzhai Oil Fields in Zhongyuan are characterized by higher permeability, severe inhomogeneity and very low pressure and is contaminated in course of water flooding and in various chemical operations. For acidizing the producing wells at Wenminzhai a foaming acid system is developed. The acidizing fluid used is composed of following slugs: preflush foam, pad foaming acid (12-15%HCl, compounded), basic foaming acid(10-12%HCl+2%HF+2%HAc,compounded), overdisplacing fluid, and backflow aid fluid. The field uses of the foaming acid system in 26 acidizing operations (in 22 wells) are described.