Abstract: Viscosity of crude oil in LD 27-2 oil field was different in different layers. Light oil mainly existed in Dongying formation and viscosity was 4.8~6.0 mPa·s, and it was produced by electric submersible production. Heavy crude oil existed in Minghuazhen formation and its viscosity was 1 052.0~5 369.2 mPa·s, surface oil density was 0.968~0.989 g/cm³, so it is difficult to use electric submersible pumps for oil extraction. Therefore, we try to use crude oil in Dongying formation as power fluid to extract oil from Minghuangzhen A14h well and A15h well using jet pump. After field application, oil production was stable and reached ODP production proration, and cost was reduced. This is the first application of jet pump production using light oil as power fluid in offshore heavy oil field and some proposals to improve this technology was also put forward in this paper.