Application and effects of offshore horizontal well development in DF gas field

DF gas field is the first offshore self-operation giant gas field in China.The main difficulty in development of the gas field is large area of reservoir scale and congruent with gas but low reserve abundance.The reserve is of strong heterogeneity,and the reservoir property is medium pore,medium-low permeability or low-resistivity gas reservoir.The type of gas reservoir is gas reservoir with edge water and low water,mainly in medium and low productivity.Therefore,horizontal well development in DF gas field is put forward,the outstanding advantages and key technology needed in horizontal development are researched.By comprehensive research and strengthening analysis while drilling and production management,the advantage of horizontal well development in DF gas field is transformed into real effects by relevant key techniques.The real drilling data of 27 horizontal wells all in the gas field,commission test results and production data after production show that the design,implementation and production meet the requirement of ODP and long time high yield and stable gas supply for downstream users may be achieved.