摘要
针对海上油气田酸化的特殊性进行了不动管柱酸化可行性研究和现场实践活动。考虑高孔高渗油气田伤害特点及增产机理,选用溶解力相对较弱、作用半径相对较大并且不损伤电潜泵系统的酸液体系,最终筛选出了以氟硼酸为主的酸液体系;提出了采用与不动管柱酸化工艺相配套的分流工艺。不动管柱酸化采用平台支撑酸化作业,无需动用钻井船、残酸使用电潜泵返排并直接进入生产流程处理。间隔注酸效果评价试验和电缆腐蚀试验证明不动管柱酸化工艺能够达到海上油气田酸化作业和不影响后续生产的要求,现场应用表明不动管柱酸化工艺完全能满足类似海上油气田的酸化作业需要,从而大大地简化了施工程序,缩短了作业周期,降低了作业成本,在渤海油气田得到广泛应用。
The feasibility study and field practice of original production string acidizing were carried out in light of the particularity of the acidizing in offshore oil fields. An acid fluid system being mainly composed of fluorboric acid, which is of relatively poor solvability, relatively great acting radium and no damage to ESP system, was finally selected in consideration of the damage characteristics and stimulation mechanism of the oil reservoir with high porosity and high permeability. The fluid diverting technology necessary for the original production string acidizing technology was applied; the acidizing operati on could be done on the platform without drilling ship; and the residual acid flowed back through ESP system and entered into the production process for treatment. Through discontinuous acid injection effect e-valuation and wireline corrosion test, it was proved that the original production string acidizing technology could meet the needs of the acidizing job in offshore oil field and of its follow-up production being not affected. The on-site application results indicated that the technology could completely meet the needs of the acidizing treatment in offshore oil field, thus greatly simplifying the operating process, shortening the job cycle and reducing the operation cost, and it has been widely applied to the oil fields in Bohai Sea.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2005年第4期95-97,共3页
Natural Gas Industry
基金
中国海洋石油总公司科技攻关项目"歧口17-2油田不动管柱酸化工艺技术研究"部分内容
