大直径旋转井壁取心仪研制与应用

为解决传统液压驱动式旋转井壁取心仪存在的驱动钻头扭矩低、岩心收获率低等问题,研制一种基于直流电机驱动钻头、最大扭矩可达8N·m的大直径旋转井壁取心仪。阐述了仪器的结构、性能指标、工作原理,对取心探头作了重点介绍。仪器研制成功后在各油田地质区块得到应用,取心收获率达90%以上。

Defect-related visible luminescence of ZnO nanorods annealed in oxygen ambient

ZnO nanorods prepared by a solution-phase method are annealed at different temperatures in oxygen ambient.The luminescence properties of the samples are investigated.In the same excitation condition,the photoluminescence(PL) spectra of all samples show an ultraviolet(UV) emission and a broad strong visible emission band.The asymmetric visible emis-sion band of annealed samples has a red-shift as the annealing temperature increasing from 200 ℃ to 600 ℃ and it can be deconvoluted into two subband emissions centered at 535 nm(green emission) and 611 nm(orange-red emission) by Gaussian-fitting analysis.Analyses of PL excitation(PLE) spectra and PL spectra at different excitation wavelengths reveal that the green emission and the orange-red emission have a uniform initial state,which can be attributed to the electron transition from Zn interstitial(Zni) to oxygen vacancy(Vo) and oxygen interstitial(Oi),respectively.

SDZ-8000快测平台及其在大港油田的应用

石油工业钻井提速现状要求测井技术必须作出相应的技术升级,井下仪器的小型化、阵列化、集成化以及高时效性已成为重要发展方向。SDZ-8000快速测井平台在大幅度缩短仪器串长度的基础上,进一步提高了纵向分辨能力,且一次下井可以完成所有常规测井项目。文中介绍了该快测平台的结构以及在大港油田的现场应用情况,结果表明,SDZ-8000快速测井平台稳定可靠且能够有效提高测井时效,降低测井施工风险,可以进一步的推广应用。