Southeastern Chongqing is the first area to realize commercial development of shale gas in China. According to the main development progress of drilling and completion technologies in this area

10 key technologies are summarized

which are

casing program optimization

severe loss control in shallow layers

low-cost managed pressure drilling

well trajectory control based on geology-engineering integration

bit selection

oil-based drilling fluid with low oil-water ratio

ROP enhancement through drilling parameter optimization

cementing technology for leakage wells

completion technology for preventing trapped pressure in annulus

and factory-like drilling technology. In order to make up for the deficiency in drilling and completion technologies

six directions of further research are proposed

which are

drilling equipment automation

drilling parameter enhancement

water-based drilling fluid

complex situation treatment

small hole drilling and completion

and shale gas drilling with long horizontal section

which aim to improve the drilling and completion technologies and the exploration and development profits in southeastern Chongqing.