一种用于油田井口定位的仪器

随着我国经济的快速发展,油田开发技术在不断的创新。文章重点讲述了一种用于油田井口定位的仪器。

SZS变密度仪常见问题及对策

文章就变密度仪在实际使用中经常出现的问题 ,从理论上进行深入的分析 ,指出了变密度仪常见问题产生的原因 ,并提出了可行性的解决措施。这对各油田使用此类仪器具有一定的借鉴意义。

Effect of absorption boundary layer on nonlinear flow in low permeability porous media

Taking low permeability cores of Daqing oilfield for example,the flow characteristics at low velocity were studied with the self-designed micro-flux measuring instrument.Considering the throat distribution and capillary model,the thickness of fluid boundary layer under different pressure gradients was calculated,and the mechanism and influencing factors of nonlinear percolation were discussed.The results show that the percolation curve of ultra-low rocks is nonlinear,and apparent permeability is not a constant which increases with pressure gradient.The absorption boundary layer decreases with the increase of pressure gradient,and changes significantly especially in low pressure gradient,which is the essence of nonlinear percolation.The absorption boundary layer is also found to be impacted by the surface property of rocks.

在恶劣环境中工作的液压系统的某些特点

本文所介绍的液压系统是油田测井仪器的井径传感器的动力部分。该仪器工作在有严重腐蚀性介质(气体、液体或泥浆)的环境中,环境最高压力178MPa,最高温度175℃,液压装置的外型尺寸限制在φ86×1280毫米体积内。在这种恶劣环境中工作的液压系统具有许多与众不同的特点:结构要紧凑,工作要可靠,对环境变化的适应能力要强。