Two Sinopec pilot projects in Northwest Oilfield passed the acceptance test

On April 23, a significant milestone was achieved in Chengdu, Sichuan: the successful completion of an engineering pilot test and promotion project involving the application of the Torque Impactor in the Shajingzi Formation and the use of Turbines in the Paleozoic strata within the Yubei area. The project has passed the acceptance review by Sinopec Petroleum Engineering Company, marking a major breakthrough in drilling technology for this key exploration region. The Yubei area is located in the northwestern part of the Maigeti slope within the southwestern depression of the Tarim Basin. Yubei 1 well, which targets the Ordovician Yingshan Formation, produced over 30 tons of oil, and subsequent wells such as Yubei 6A, Yubei 8, and Yudong 4 have also shown promising oil and gas displays. This has highlighted the strong potential for exploration in the Yubei area, making it one of the priority zones for the Northwest Oilfield in recent years. However, the geological complexity of the region, caused by multiple tectonic movements and fault activity, has posed challenges in drilling through the Paleozoic strata. Drilling rates in the early Paleozoic Permian and Carboniferous formations were extremely low, averaging only 1.6 meters per hour, with an average drilling time of 99 days—accounting for 56.7% of total drilling time. This slow progress significantly hindered exploration efforts, making it crucial to develop advanced drilling technologies to improve efficiency. To address these challenges, the pilot projects focused on tailored solutions based on the specific characteristics of the formations. Through research on bit selection, new technologies such as the Torque Impactor and Turbine were introduced. Field tests were conducted to translate scientific findings into practical applications. In the Shajingzi Formation, the "PDC + Torque Impactor" drilling method was applied across five wells, resulting in a 176.85% year-on-year increase in mechanical drilling rate and a 28.68% reduction in overall costs. In the Zelek and Kupukuz groups, the "Diamond Bit + Turbine" method was tested on two wells, achieving a 98%-140% improvement in drilling speed. These results demonstrated significant improvements in both speed and efficiency, effectively solving the long-standing issue of slow drilling in the third-stage well section. By enhancing drilling performance, the project has laid a solid foundation for future engineering support and has become a new driving force for increasing drilling speed in the Yubei area. It has played a vital role in supporting the strategic development plans of the Northwest Oilfield, paving the way for more efficient and effective exploration and production activities in the region.

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