CAJ | 학술논문

石南油田属于低渗透砂岩储层,经过多年开采后储层堵塞严重,迫切需要进行深部解堵.根据储集层物性特征及敏感性分析,确定化学缓速酸为该地区的酸化体系.通过比较不同缓速酸的溶蚀能力,筛选出一种缓速酸体系SN12(10%盐酸+5%色胺酸+3%腐植酸),并对酸液添加剂配方进行了优选.岩心模拟酸化实验结果表明,注入SN12缓速酸后,随着酸岩反应时间的延长,岩心渗透率大幅度提高;且随着缓速酸注入量的增加,酸化效果大幅度提高;动态长岩心酸化效果评价结果表明,SN12缓速酸的深部酸化改造效果明显.
석남유전속우저삼투사암저층,경과다년개채후저층도새엄중,박절수요진행심부해도.근거저집층물성특정급민감성분석,학정화학완속산위해지구적산화체계.통과비교불동완속산적용식능력,사선출일충완속산체계SN12(10%염산+5%색알산+3%부식산),병대산액첨가제배방진행료우선.암심모의산화실험결과표명,주입SN12완속산후,수착산암반응시간적연장,암심삼투솔대폭도제고;차수착완속산주입량적증가,산화효과대폭도제고;동태장암심산화효과평개결과표명,SN12완속산적심부산화개조효과명현.
After many years of production, the permeability of the reservoir formation in block Shinan has been severely reduced. Physical properties and sensitivity of the reservoir formations were analyzed in an effort to find an approach to recover the formation permeability. It was decided to use retarded acids as a treatment. A retarded acid formulation SN12 (10% hydrochloric acid+5% tryptophan+3% humic acid)was designed for use in the acidification treatment. Core tests showed that after inieeting SN12 into the cores used, core permeability was greatly increased with time, and the more the acid used, the greater the recovery of the core permeability. Dynamic acidification test on lone cores showed that SN12 has an appar-ent effect on deep acidification.