Optimization and Application of High Quality and High Speed Drilling Technology for Gas Well in Fuxian Gasfield

Abstract:

The research is carried out on high quality and high speed drilling technology to solve low ROP, long drilling cycle and complex downhole instances of natural gas well in Fuxian block. The difficulties in drilling construction are summed up and analyzed; based on the study on rock drillability, by the cuttings rolling recovery experiment and agents screening experiment and combining with the field application, the drilling parameters are optimized. A group of bits are selected, which are applicable to the formation characteristics of this block with strong wear resistance and effective footage; bottom hole assembly is optimized with compound drilling of rotary table screw; potassium-ammonium polysufonate drilling fluid system are optimized to ensure downhole safety. Field practice shows that the average drilling cycle reduces 49.35% and the downhole accident reduces greatly, which provide the powerful technical support for high quality and high speed drilling in natural gas well of Fuxian block.