Abstract:

By the adjustment of the global energy consumption structure, the progress of shale gas exploration technology and the clean feature of shale gas, the rational development of shale gas reservoir has been the popular research direction. Therefore, how to make efficient and stable development plan of gas reservoir is very important. Taking the shale gas reservoir in Pingqiao as the research target, we established the horizontal fracturing well models with duel media by the software CMG to simulate the influence of the production allocation and recovery time after shut in on the development effect. The analysis suggests that different fracturing effects need different rational production allocation. The worse the fracturing reconstruction effect is, the lower the rational production will be, along with that are lower final recovery ratio and shorter stable production time. After the stable production period, the wells could be shut in for 20 ~ 30 days in order to recover the pressure and daily production. It is concluded that the allocation system and fracture effects affect mostly on the overpressure shale gas development. The key of the high and stable production is to improve the seepage capacity and reasonable distribution in the fracturing reconstruction region.

Key words: shale gas, proration, shut-in time, stable yield, numerical simulation