焉耆盆地八道湾组储层复合酸酸化技术

针对焉耆盆地深层系八道湾组低渗透储层特征,提出了储层酸化改造的酸液体系的基本要求,按照石油天然气行业标准进行了大量的室内实验评价工作,确定了酸液类型和浓度,筛选了缓蚀剂、铁离子稳定剂、粘土稳定剂和助排剂等酸液添加剂,研究出一种具有缓速、对地层低伤害、增产效果明显的复合酸酸液配方。同时研究出多次冲压施工工艺,现场施工9井次,工艺成功率100%。T3井、T301井酸化后获得工业油气流,具有较大的经济效益和社会效益。

COMPOUND-ACID TREATMENT IN BODAOWAN FOR-MATION OF YANQI BASIN

Basic requirements of acid fluid for acidizing treatment were analyzed in this paper based on the Badaowan formation with low-permeability in Yanqi Basin. a lot of experimental evaluations were made according to the oil and gas industry standard of China, and the type and concentration of the acid liquidwere determine. A compound-acid with good retarded property,low damage for the formation and excellent stimulation effect was given though choosing corrosion inhibitor, iron-control agent, clay stabilizer and cleanup additive in laboratory. A new acidizing technique was introduced and improved. The com-pound acid fluid and technology was successfully practiced 9 wells, and the great economic and social benefit was got.