tweeter, page-24

From what the snippet below it says drilling througha hydrate zone has been looked into and can be safely done but will require a different choice of drilling fluid
Birchwood
et al. [17] concluded that by cooling drilling fluid and decreasing the
circulation rate, the influence of drilling through gas-hydrate-bearing sediments on petroleum
operations can be minimized. Therefore, it is important to take appropriate efforts to minimize
gas-hydrate dissociation or inhibit the formation of gas hydrate within the drill string or annulus to
ensure safe drilling operations. This matter depends on the rational drilling fluids system. The choice
of drilling fluids plays an important role in achieving the above-mentioned objectives.