Great Wall Drilling's Dual-wheel Drive Creates A Benchmark Drilling Project in The Block

The pilot test well Zi 201H2-5 constructed by the Great Wall Drilling 70185 team in the new formation block of Zizhong, Neijiang City, Sichuan Province was successfully drilled. The drilling cycle was shortened by 29% compared with the design target. It was the first pilot test well to be completed in the same period, and the first time to achieve "drilling completion within 100 days" in this block, becoming a benchmark project.

In order to ensure that the well completes the three major tasks of "proven reserves, pilot tests, and new well production capacity" with high quality, Great Wall Drilling takes the "geology + engineering" dual-wheel drive as the core, carries out multi-dimensional technical research, and accurately identifies geological anomalies and engineering risks. At the same time, through the special team's front-line command and intelligent production organization guarantee, risk well section experts monitor the whole process to ensure the accurate execution of key links and achieve "zero failure and zero complexity" in the whole well.Faced with the problems of poor drillability, high bottom temperature, and poor well wall stability of the Ziliujing Group and Xujiahe Group, the company established a special technical team to carry out targeted drill bit selection and speed-up tool optimization, forming an efficient composite rock breaking technology system, refreshing the shortest construction record. In the horizontal section construction, the innovative application of the integrated guidance mode of "geological guidance modeling + special logging + geophysical drilling tracking prediction + engineering implementation difficulty simulation" ensures that the horizontal section box drilling rate reaches 100%. The high-quality completion of the well provides key support for the implementation of proven reserves of shale gas in the Qiongzhusi Group in central Sichuan and the promotion of pilot tests.