塔中碳酸盐岩酸压压裂液体系优化

Optimization of Acid Fracturing Fluid System for Tazhong carbonate

塔中I号气田属于海相碳酸盐岩油气藏,地层非均质性极强,单井难以直接钻遇较大的缝洞系统,储层改造是建产的必要条件。该区域采用酸压技术进行改造,主要使用瓜胶压裂液和黄原胶非交联压裂液。通过对以上两种压裂液的伤害性、携砂能力、摩阻、滤失性、配伍性等方面进行对比性分析,得出塔中碳酸盐岩酸压压裂液的选择。

The gas field I in Tazhong area belongs to the marine carbonate reservoir, and the heterogeneity of formation is very strong. It is difficult for a single well to be drilled into a large fracture cavity system. The acid fracturing technology was used in this area, mainly using guar gum fracturing fluid and xanthan gum. Through the comparative analysis of two kinds of fracturing fluid, such as the damage, sand carrying capacity, friction and so on, the suitable acid fracturing fluid system was selected.