Key technology for optimal fast drilling of directional well in Xujiahe-2 Formation of Xinchang Structure,Western Sichuan
The tight sand formation reservoir of the Xujiahe-2 Formation in Xinchang Structure,Western Sichuan has failed to form large-scale commercial development for a long time due to the unbalance of drilling cost and development benefit.According to the geological characteristics of the working area,this paper optimized the well structure based on the optimization of setting positions,the hole size,the hole trajectory.The key technology with high speed combining the rotary hammer drilling tools,the low cost of the rotating guide tool,pre-bending drilling tools,and the optimization of the real-time drilling perameters based onf the minimum mechanical specific energy,which has been the key thech-nology for horizontal well driiling in tight gas reservoirs in Xujiahe-2 Formation of Xinchang Structure,Western Sich-uan.The comprehensive application of this technology in the block has achieved the breakthrough of shortening the shortest drilling cycle from 231.1d to 95.7d,which achieves good results,and realized the benefitial development of the block.
tight gas reservoirs in Xujiahe-2 Formation of Xinchang Structuredirectional welloptimal fast drillingrotary hammer drilling toossrotary guide tools
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