裂缝性碳酸盐岩储层酸化评价模型及敏感性参数分析

Acidification evaluation model and sensitivity parameter analysis of fractured carbonate reservoir

本文引入蚓孔表征碳酸盐岩储层酸化后特征,基于采油工程及渗流理论建立了表皮系数-蚓孔长度-酸液用量的内在关系图版,研究结果表明:蚓孔越长,酸化效果越明显,当蚓孔突破污染区域后,注入的酸液对实际的油气井改善效果不明显,此研究为碳酸盐岩储层酸化酸液设计优化提供依据。

This paper introduced wormholes to characterize the acidized carbonate reservoir.Based on production engineering and percolation theory,the chart is established for skin factor-wormhole length-acidizing fluid volume.The results show that the longer wormholes are,the more obvious the acidizing effect is.Actually,when wormholes break through the contaminated zone,the injected fluid has no obvious improvement effect on the oil and gas wells.This study provides a basis for the optimization of acidizing fluid design for carbonate reservoirs.