不动管柱酸化工艺在渤海油田的应用

由于海上油田开发的特殊性,渤海油田多采用基质酸化技术解除堵塞,加速回收投资。针对动管柱酸化作业施工工艺复杂、作业周期长、作业费用较高等缺点,阐述了不动管柱酸化工艺在渤海绥中36-1油田的应用情况。考虑高孔高渗油田伤害特点及增产机理,选用溶解力相对较弱、作用半径相对较大的酸液体系,通过室内试验,筛选出以氟硼酸为主的酸化液配方,并提出采用与不动管柱酸化工艺相配套的暂堵酸化工艺和残酸返排工艺。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洋酸化作业和不影响后续生产的要求,从而简化施工程序,节约作业成本。

Application of Acidizing Technology with Original Production String in Bohai Oilfield

Because of the specialties of offshore Oilfield development, matrix acidizing should be applied to get investment back quicker for BoHai Oilfield. Considering the shortcomings of using the other set of string, such as complexity, affecting production efficiency, high operating cost, the paper give a viewpoint of acidizing with original production string. It is important to selecting fluid system with big action radium and weak solvability for offshore oil field with high porosity, high permeability. By making experiments in laboratory, the formula fluorboric acid system is selected; moreover, corresponding fluid temporarily plug technology and acid flowback technology are discussed. The operation can be done on platform without drilling ship, the acid flowback is also be treated by original ESP. The effect of discontinuous injecting acid and wireline corrosion has been tested by experiment. Practice applying show these can completely meet the demand of similar of oil fileds of BoHai, and which can be economic and make the operation easier than bofore.