Asia-focussed oil and gas explorer Tetragon Energy has upgraded the potential of its gas portfolio off the coast of the Philippines, more than tripling the mid-case prospective resource estimate for a key exploration prospect to 8 trillion cubic feet (tcf), a boost that could strengthen the value of the acreage ahead of potential farm-out talks. The post Three-fold resource surge sharpens focus on Tetragon’s gas play offshore Philippines appeared first on Offshore Energy .