通过对中国石油所面临的形势进行分析，指出目前中国石油产量的70%仍然来自老油田，其剩余可采储量仍相当可观。

This paper analyzes current situation of Petro China and points out that 70% of PetroChina's oil production still comes from old fields where considerable residual recoverable reserves still exist.

youdao

通过对中国石油所面临的形势进行分析，指出目前中国石油产量的70%仍然来自老油田，其剩余可采储量仍相当可观。

This paper analyzes current situation of Petro China and points out that 70% of PetroChina's oil production still comes from old fields where considerable residual recoverable reserves still exist.

youdao