特种油气藏2012，Vol.19Issue(2)：101-103,3.
致密砂岩气藏混醇酸液体系研究
摘要
Abstract
The tight sandstone gas reservoirs in Baka oilfield has experienced formation damage problems such as water locking in a-cidizing treatment, therefore a mixed alcohol acidizing fluid system has been developed to improve gas permeability and acidizing result. Laboratory experiments have been conducted to screen the type and concentration of alcohol and acid, to evaluate the surface tension of the mixed alcohol acidizing fluid system and its compatibility with additives. The effect of the mixed alcohol acidizing fluid system has been evaluated through core flow experiments. The results show that alcohol is good at reducing surface tension; and the corrosion rate of tight sandstone reservoir cores by the acidizing fluid system of methanol mixed with 6% multi - hydracid can reach up to 14.08% ~ 15.45% ; the acidizing fluid system of 6% multi - hydracid + methanol/ethanol is well compatible with additives such as clay stabilizer, corrosion inhibitor and cleanup additive, with both surface tension and reacted acid surface tension less than 25.8 mN/m; after treated by the acidizing fluid system of multi -hydracid + alcohol, the ultimate core permeability is 14. 28 ~21 times of the base permeability, showing obvious effect of plug removal and fully satisfied the technical requirements of acidizing the tight sandstone gas reservoirs in Baka oilfield.关键词
混醇酸液/致密砂岩气藏/水锁/酸化/表面张力/甲醇Key words
mixed alcohol acidizing fluid system/ tight sandstone gas reservoir/ water locking/ acidizing/ surface tension/ methanol分类
能源科技引用本文复制引用
郭建设,卢红杰,吴迪,刘平礼,梁栩..致密砂岩气藏混醇酸液体系研究[J].特种油气藏,2012,19(2):101-103,3.基金项目
中油重点工程项目"吐哈油田低孔低渗(致密砂岩气)储层试油、试采产能评价技术研究"(2009D-2404-01) （致密砂岩气）
