Practice and Understanding of Well Control Technology in HTHP Gas Wells in Yinggehai Basin

It is rather difficult for the well control during drilling the offshore gas wells with HTHP (high temperature and high pressure). With the introduction of drilling operation by KANTAN 3, a semi-submersible drilling platform, which has performed the drilling of more than 30 gas wells with HTHP, including DF1-1-13, in Yinggehai Basin of South China Sea, this paper elaborates the difficulties in the well control of offshore gas wells with HTHP, summarizes the experience of the well control technology, which can be used as the reference to the future drilling operation in this basin and other areas with HTHP.