关键词: 中深层稠油, 油藏改造, 降黏, 过泵电加热, 掺液降黏

Abstract: It is difficult for conventional steam flooding heavy oil production technology to bring deep heavy oil reservoir under development thanks to its large buried depth, high viscosity and poor flowing ability in formation and wellbore. To solve the problems related to production of deep heavy oil reservoir, it is necessary to settle the issue of crude flowing ability. Take Ji-7 block of Xinjiang Oil Field for instance. A series of process technologies, such as reservoir transformation, hollow pump matching pump electric heating, screw pump lifting and addition and blending of liquid for viscosity reduction, was used in heavy oil development, with effective and economic results achieved. Based on integration of technology, deep heavy oil was made technologically recoverable. The single-well production was doubled as compared to that before experiment. Meanwhile, the production cost was lowered by one third, solving the problems of reservoir development.

Key words: deep heavy oil, reservoir transformation, viscosity reduction, pump electric heating, addition and blending of liquid for viscosity reduction, screw pump