新疆油田准噶尔盆地复杂地质条件深井、超深井钻井技术

该课题针对准噶尔盆地的地质条件，形成了“地层孔隙压力检测预测综合应用”等十多项实用技术及相关软件，包括提高预探井地层孔隙压力、破裂压力和坍塌压力的预测、检测精度；提高地应力分布规律及对井壁稳定影响的机理及对策；钻头合理选型及钻进配套工艺；深井陡构造高效防斜技术；深井复杂情况及事故的预测及处理技术；高温、高压、高密度钻井液性能稳定性技术；提高低压易漏长封固段固井、高温高压气井固井技术；高扭距涡轮节、长寿命轴承组可靠性分析。该项目提高了新疆油田准噶尔盆地复杂地质条件深井、超深井钻井技术水平，促进了准噶尔盆地腹部和南缘山前构造带的勘探步伐，提高了综合经济效益

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^