BZ34油田回注水合理水质控制指标设计

Design of reasonable water quality control indexes for BZ34 oilfield reinjection water

针对BZ34油田有效注水开发的水质控制要求,从设计指标和设计方法两方面对油田回注水控制指标进行了实验研究,并结合典型低渗油田的注水水质推荐指标及现行标准,建立了海上低渗透油田水质标准体系。研究结果表明,为实现BZ34油田有效注水,将伤害程度控制在20%～40%时,水质控制指标中悬浮颗粒粒径应〈3μm,悬浮颗粒质量浓度应〈5 mg/L,含油质量浓度应〈15 mg/L。

Aiming at the water quality control requirements for the effective injection water development of BZ34 oilfield ,in the aspects of design indexes and design methods, an experimental research on oilfield reinjection water control indexes have been conducted. Combined with the injection water quality recommended index of the typical low permeable oil_field and current standard, the systems of water quality standard for offshore low permeable oilfield are established. The research results show that in order to realize the effective injection in BZ34 oilfield ,when 20%- 40% of the damage degree is controlled ,according to the water quality control indexes ,the size of suspended particles should be〈3 μm, the mass concentration of suspended particles should be〈5 mg/L, and the mass concentra- tion of oil contained should be〈15 mg/L.