注水系统节能技术的探讨

Energy-saving Technologies for Waterflood System

大庆油田第二采油厂注水系统由于耗电量大,进行节能改造。采用注水泵高压变频技术,单耗可降至5.6(kW·h)/m3,需3a收回成本,适用于单耗及泵管压差大的注水泵;采用注水泵减级技术,单耗可降至5.82(kW·h)/m3,需69d收回成本,适用于区块注入压力低、泵管压差大的注水泵;采用前置喂液泵技术,单耗可降至5.5(kW·h)/m3,需1.5a收回成本;采用注水泵涂膜技术应用于泵效低的注水泵,单耗可下降0.2(kW·h)/m3,需150d收回成本;应用液体黏性调速离合器,单耗可下降0.47(kW·h)/m3,需要2.2a收回成本。

The No.2 Oil Production Plant of Daqing Oilfield Co.,Ltd conducted an upgrade to its walerflood system to raise the system＇s power efficiency.If the waterflood pump high-voltage variable frequency technology is adopted,the system＇s unit energy consumption could drop to 5.6（kW·h）/m^3 and the investment could be recovered in 3 years.This option is suited to waterflood pumps with large unit energy consumption and pump-line pressure differentials.If the waterflood pump stage-reducing technique is used,the unit energy consumption could drop to 5.82（kW·h）/m^3 and the investment could be recovered in 69 days.This option is suited to the waterflood pumps which are used in low-injection pressure blocks and which have large pump-line pressure differentials.If the front-mounted liquid-feeding pump technology is used,the unit energy consumption could drop to 5.5（kW·h）/m^3 and the investment could be recovered in 18 months.If the waterflood pump film coating technology is used in a low-efficiency waterflood pump,the unit energy consumption could drop by 0.2（kW·h）/m^3 and the investment could be recovered in 150 days.If a hydraulic viscous coupling is used,the unit energy consumption could drop by 0.47（kW·h）/m^3 and the investment could be recovered in 2.2 years.